Annals of Occupational and Environmental Medicine

Original Article

Association between outdoor clothing use and serum perfluoroalkyl substances (PFAS): Korean National Environmental Health Survey cycle 4: Keon Woo Kim, Jisoo Kang, Seong-yong Cho, Seongyong Yoon, Daehwan Kim, Hyun Woo Park; Ann Occup Environ Med 2026;38:e4. Published online January 8, 2026; DOI: https://doi.org/10.35371/aoem.2026.38.e4

Abstract Abstract in Korean PDF Supplementary Material: Background
Perfluoroalkyl substances (PFAS) are used in various products, and PFAS have been detected in outdoor clothing. PFAS can be absorbed into the human body via oral ingestion, inhalation, and dermal contact. In this study, we examined the association between the frequency of using outdoor clothing and serum PFAS concentrations in the Korean population using data from cycle 4 (2018–2020) of the Korean National Environmental Health Survey.
Methods
Data from 2,993 adult participants were analyzed. The participants were classified into low-concentration and high-concentration groups based on the 75th percentile concentration of serum PFAS. The use of outdoor clothing was categorized into three groups: non-use, <4 times a week, and ≥4 times a week. The odds ratio (OR) for serum PFAS levels associated with use of outdoor clothing was determined through logistic regression analysis, adjusted for demographic characteristics, health-related factors, PFAS-treated items, dietary factors, and ventilation time.
Results
ORs for high serum PFAS were higher in groups using outdoor clothing compared to the non-user group. In males, the adjusted ORs for the < 4 times a week and ≥ 4 times a week outdoor clothing usage group were as follows: perfluorooctanoic acid (PFOA), 1.26 (95% confidence interval [CI]: 1.10–1.44) and 1.70 (1.40–2.07); perfluorohexanesulfonic acid (PFHxS), 1.49 (1.16–1.92) and 1.70 (1.22–2.37); and perfluorononanoic acid (PFNA), 1.34 (1.19–1.51) and 1.68 (1.38–2.05), respectively. In females, the respective ORs were as follows: PFOA 1.32 (95% CI: 1.19–1.46) and 1.53 (1.01–2.32); PFHxS, 1.46 (1.08–1.96) and 2.63 (2.10–3.29); PFNA, 1.38 (1.22–1.55) and 1.45 (1.07–1.96).
Conclusions
In adults, elevated serum PFAS levels were associated with increased frequency of using outdoor clothing.; 제4기(2018-2020) 국민환경보건 기초조사 자료를 이용한 아웃도어 의류 착용과 혈청 과불화화합물과의 관계
목적
과불화화합물(PFAS)은 방수 및 방유 효과를 가지고 있어 아웃도어 의류를 포함한 일회용 식품 포장, 조리 기구, 가구 등 다양한 제품에 사용된다. 선행 연구에 따르면 PFAS가 아웃도어 의류에서 검출되었다. PFAS는 경구섭취, 흡입, 피부접촉 등의 경로를 통해 인체에 흡수되며 체내에 장기간 잔류하면서 간기능, 신기능, 생식기능 등의 저하 증상을 유발할 수 있다. 본 연구에서는 한국 국민환경보건 기초조사(KoNEHS) 4주기(2018-2020)의 데이터를 사용하여 한국 인구의 아웃도어 의류 사용 빈도와 혈청 PFAS농도와의 연관성을 확인하고자 한다.
방법
KoNEHS 4주기의 데이터를 이용하여 2,993명의 성인 참가자를 분석하였다. 혈청 PFAS의 75 번째 백분위 수 농도를 기준으로 저농도군과 고농도군으로 나누었다. 아웃도어 의류 사용은 미사용, 주 당 4회 미만, 주 당 4회 이상으로 세 군으로 분류하였다. 아웃도어 의류 사용에 관한 혈청 PFAS의 오즈비는 인구통계학적 특성, 건강 관련 특성, PFAS 사용 물품, 식이요인 그리고 환기 시간을 보정한 후 로지스틱 회귀분석을 사용하여 구하였다
결과
본 연구에서는 아웃도어 의류를 사용하지 않는 군에 비해 주 4회 미만 사용군 및 주4회 이상 사용군에서 혈청 PFAS 고농도군에 속할 OR 값이 높게 나왔다. 남성에서 주 4회미만 사용군 및 주 4회이상 사용군에서 PFOA의 고농도군에 해당될 adjusted OR는 1.26(95% CI; 1.10-1.44) 및 1.70(95% CI; 1.40-2.07)이었다PFHxS는 1.49(95%CI; 1.16-1.92) 및 1.70(95%CI; 1.22-2.37), PFNA는 1.34(95% CI; 1.19-1.51) 및 1.68(95% CI; 1.38-2.05), 이었다. 여성의 경우 주 4회미만 사용군 및 주 4회이상 사용군에서 PFOA의 고농도군에 해당될 adjusted OR는 1.32(95% CI; 1.19-1.46) 및 1.53(95% CI; 1.01-2.32)이었다. PFHxS는 1.46(95%CI; 1.08-1.96) 및 2.63(95%CI; 2.10-3.29), PFNA는 1.38(95% CI; 1.22-1.55) 및 1.45(95% CI; 1.07-1.96) 이었다.
결론
성인에서 아웃도어 의류 착용 횟수가 많을수록 혈청 PFAS(PFOA, PFOS, PFHxS, PFNA, PFDeA) 농도가 증가하였다.

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Original Article

Association between sudden work recall and psychological health issues: a cross-sectional analysis of the 6th Korean Working Conditions Survey: Dong-Woo Kim, June-Hee Lee, In-Ho Lee, Kyung-Jae Lee; Ann Occup Environ Med 2025;37:e33. Published online September 8, 2025; DOI: https://doi.org/10.35371/aoem.2025.37.e33

Abstract Abstract in Korean PDF: Background
The impact of global integration has led to an increase in non-standard work patterns, threatening workers' health. Psychological health problems, such as anxiety and fatigue, negatively affect workers' health and safety. Sudden work recall, a situation where workers are asked to return to work under unpredictable circumstances, is associated with uncertainty. Research on the relationship between sudden work recall and anxiety and fatigue is limited, and this study aims to investigate this relationship among Korean workers.
Methods
The study used data from the 6th Korean Working Conditions Survey. To analyze the pure effects of sudden work recall, the final sample was limited to 15,702 non-shift workers with a ‘good’ subjective health status. The presence of sudden work recall was categorized into three frequency groups: “several times a month,” “rarely,” and “never.” Anxiety and fatigue were each categorized into "yes" or "no" responses. Multiple logistic regression analysis was performed.
Results
After adjusting for demographic and occupational characteristics, the odds ratio (OR) for anxiety in the 'several times a month' group was 4.066 (95% confidence interval [CI]: 2.787–5.931), indicating a significantly higher risk. Conversely, the OR for the 'rarely' group was 1.363 (95% CI: 0.921–2.017), which was not statistically significant. A similar pattern was observed for fatigue: the 'several times a month' group had a significantly higher risk (OR: 1.875; 95% CI: 1.490–2.359), but the 'rarely' group (OR: 0.955; 95% CI: 0.750–1.215) did not.
Conclusions
The relationship between sudden work recall and psychological health may not be a simple linear one. The results suggest that only a high frequency of sudden work recall is associated with an increased risk of anxiety and fatigue. Therefore, it is necessary to establish appropriate measures and to conduct additional research in this area.; 돌발적 업무 복귀 요청과 심리적 건강 문제의 연관성: 제 6차 근로환경조사를 이용한 단면 분석
목적
세계화로 인한 비정형적 근무 형태의 증가는 노동자의 건강을 위협하고 있다. 특히 불안과 피로와 같은 심리적 건강 문제는 삶의 질과 안전에 부정적인 영향을 미친다. 본 연구는 예측 불가능한 상황에서 갑자기 업무에 복귀하라는 요청을 받는 ‘돌발적 업무 복귀 요청’이 한국 노동자의 불안 및 피로와 어떤 연관성을 가지는지 조사하고자 한다.
방법
본 연구는 제6차 근로환경조사 자료를 활용했으며, 돌발적 업무 복귀 요청의 순수한 영향을 분석하기 위해 교대 근무자와 주관적 건강 상태가 ‘보통’ 이하인 근로자를 제외한 총 15,702명을 최종 분석 대상으로 선정했다. 돌발적 업무 복귀 요청의 빈도에 따라 ‘없음’, ‘드물게’, ‘한 달에 여러 번’으로 범주를 나누었으며, 다중 로지스틱 회귀분석을 통해 돌발적 업무 복귀 요청과 불안 및 피로 간의 연관성을 분석했다.
결과
인구통계학적 및 직업적 특성을 보정한 후, ‘한 달에 여러 번’ 돌발적 업무 복귀를 경험한 그룹은 불안(OR: 4.066, 95% CI: 2.787–5.931)과 피로(OR: 1.875, 95% CI: 1.490–2.359)의 위험이 유의미하게 높았다. 반면, ‘드물게’ 경험한 그룹은 불안(OR: 1.363, 95% CI: 0.921–2.017)과 피로(OR: 0.955, 95% CI: 0.750–1.215) 모두에서 통계적으로 유의미한 연관성이 나타나지 않았다.
결론
돌발적 업무 복귀 요구와 불안 및 피로의 관계는 단순히 선형적이지 않으며, 높은 빈도로 경험할 때만 유의미한 위험 증가와 관련이 있음을 시사한다. 돌발적인 업무 복귀 요청이 신체적 및 정신적 장애를 유발할 수 있는 가능성에 대한 연구는 제한적이며, 이러한 문제를 예방하기 위한 대책이 충분히 발전되지 않았다. 따라서 돌발적 업무 복귀와 관련된 근로자 건강 보호 및 예측 가능한 근무 환경 조성 분야에서 적절한 대책을 수립하고 추가적인 연구를 수행할 필요가 있다.

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Original Article

Association of weight and dietary habits with high blood mercury levels in Korean adolescents: data from the KoNEHS cycle 4, 2018-2020: Ji Hoon Kim, Minju Jung, Jaewon Mun, Dong-Jae Seo, Jong-Han Leem, Shin-Goo Park, Dong-Wook Lee, Hyung Doo Kim, Hwan-Cheol Kim; Ann Occup Environ Med 2025;37:e5. Published online February 21, 2025; DOI: https://doi.org/10.35371/aoem.2025.37.e5

Abstract Abstract in Korean PDF Supplementary Material

Background
Humans are exposed to mercury primarily in its highly toxic form, methyl mercury, which is known to have adverse effects on various organs and systems. The negative impact of mercury exposure on the growth, development, and mental health of children, from infancy to adolescence, is well-documented. However, there are no internationally standardized safe limits for mercury exposure. This study investigated the impact of dietary habits and higher body mass index (BMI) on blood mercury levels in adolescents.
Methods
This study analyzed the data from the 4th Korean National Environmental Health Survey (KoNEHS) 2018–2020. The focus was on 825 middle and high school students aged 13–18 years, whose blood mercury levels were measured. A survey on dietary and lifestyle habits was also conducted. Blood mercury levels were categorized by geometric median values, and associations with overweight status and seafood consumption were examined using a generalized linear model.
Results
The geometric mean blood mercury level for the entire sample was 1.37 μg/L, with levels of 1.31 μg/L in normal-weight individuals and 1.43 μg/L in overweight individuals, showing a statistically significant difference between the two groups. After adjusting for other variables, blood mercury levels were significantly associated with overweight status (estimate: 0.084; p = 0.018; 95% confidence interval [CI]: 0.015–0.153), consumption of large fish and tuna more than once a week (estimate: 0.18; p = 0.001; 95% CI: 0.077–0.284), and consumption of fish once a week or more (estimate: 0.147; p = 0.004; 95% CI: 0.043–0.250).
Conclusions
In adolescents, a higher BMI and an increased consumption of large fish, tuna, and fish were associated with higher blood mercury levels. Notably, a stronger association was found between large fish consumption and blood mercury levels in the overweight group. These findings suggest the need to moderate seafood consumption and establish more proactive mercury exposure standards for adolescents.

한국 청소년에서 체중 및 식습관과 높은 혈중 수은 농도의 연관: KNHANES 제4기 데이터, 2018-2020
목적
수은은 독성이 강한 형태인 메틸 수은의 상태로 인간에게 주로 노출된다. 메틸 수은은 발달 및 정신건강측면을 포함한 인체 전반에 독성 영향이 있지만 현재 국제적으로 표준화된 수은 노출 기준이 없다. 특히나 영유아나 청소년은 발달이 아직 이루어지지 않아 성인에 비해 더 수은 노출의 위험도가 높다. 본 연구에서는 청소년의 식습관이나 과체중 여부가 혈중 수은 노출에 미치는 영향을 조사하였다.
방법
본 연구는 국립환경과학원에서 발간하는 제4기 국민환경보건 기초조사(2018-2020)를 활용하였다. 제4기 대상 중 혈중 수은 농도가 측정 된 13-18세의 중, 고등학생 825명을 대상으로 하였고 식습관이나 생활 습관에 대한 개인 설문을 활용하였다. 혈중 수은 농도 중위 값을 기준으로 구분하여 과체중 여부를 구분하여 각종 해산물 식습관과 혈중 수은 농도와의 연관성을 로지스틱 회귀 모델을 사용하여 조사하였고, 이 후 전체 연구 대상자를 대상으로 연관성을 조사하였다.
결과
전체 표본의 기하평균 혈중 수은 농도는 1.37 µg/L로, 정상체중 군은 1.31 µg/L, 과체중 군은 1.43 µg/L로 나타났으며, 두 군 간에 통계적으로 유의미한 차이가 있었다. 다른 변수들을 조정한 후, 혈중 수은 농도는 과체중 상태(추정값: 0.084; p-value: 0.018; 95% 신뢰구간[CI]: 0.015-0.153), 주 1회 이상 대형어류와 참치 섭취(추정값: 0.18; p-value: 0.001; 95% CI: 0.077-0.284), 주 1회 이상 어류 섭취(추정값: 0.147; p-value: 0.004; 95% CI: 0.043-0.250)와 유의미한 관계가 있었다.
결론
청소년에서 높은 BMI와 대형어류, 참치, 어류 섭취가 높은 혈중 수은 농도와 관련이 있었다. 특히, 과체중 그룹에서는 대형어류 섭취와 혈중 수은 농도 간의 강한 연관성이 발견되었다. 이 결과는 청소년을 위한 해산물 섭취 절제와 더 적극적인 수은 노출 기준 설정이 필요함을 시사한다.

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Association between complex exposure to cadmium and mercury and atopic dermatitis in elementary school students: analysis using data from the Korean National Environmental Health Survey (KoNEHS) Cycle 4
Kiook Baek
Central European Journal of Public Health.2025; 33(1): 3. CrossRef

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Original Article

Relationship between the use of hair products and urine benzophenone-3: the Korean National Environmental Health Survey (KoNEHS) cycle 4: Siyoung Kim, Seong-yong Cho, Seongyong Yoon, Daehwan Kim, Hyun Woo Park, Jisoo Kang, Sung Woo Huh; Ann Occup Environ Med 2024;36:e20. Published online August 6, 2024; DOI: https://doi.org/10.35371/aoem.2024.36.e20

Abstract Abstract in Korean PDF Supplementary Material

Background

Benzophenone-3 is a type of ketone with 2 benzene rings attached to a carbonyl group (C=O) and one benzene ring attached to a hydroxyl group (-OH). As an endocrine-disrupting chemical, benzophenone-3 is known to be associated with reproductive, developmental, thyroid, and endocrine toxicities. Benzophenone-3 is commonly used in hair products, cosmetics, and ultraviolet (UV) filters because of its characteristic property to absorb UV light. This study aims to investigate the association between the use of hair products and urine benzophenone-3 using the data from the Korean National Environmental Health Survey (KoNEHS) cycle 4 (2018–2020), which represents the Korean population.

Methods

Using the KoNEHS cycle 4 survey, the data of 3,796 adults aged ≥ 19 years were analyzed. Based on the 75th percentile concentration of urine benzophenone-3, the participants were divided into the low- and high-concentration groups. Chi-square test was conducted to analyze the association of urine benzophenone-3 with distribution of general characteristics, use of personal care products, consumption of marine foods, and use of plastic products as the variable. Logistic regression analysis was conducted to calculate odds ratios (ORs) for the high-concentration group of urine benzophenone-3 based on the use of hair products.

Results

Women with < 6 times or ≥ 6 times of hair product usage had significantly higher adjusted ORs compared to those who did not use hair products. The calculated ORs were 1.24 (95% confidence interval [CI]: 1.12–1.38) for women with < 6 times of usage and 1.54 (95% CI: 1.33–1.79) for women with ≥ 6 times of usage.

Conclusions

This study revealed the association between the use of hair products and the concentration of urine benzophenone-3 in the general Korean population.

제4기 (2018-2020) 국민환경보건 기초조사를 이용한 헤어제품사용과 요중 벤조페논-3(benzophenone-3)과의 관계
목적
벤조페논-3은 2개의 벤젠고리가 카르보닐기(C=O)에 결합된 케톤 형태로 이루어져 있으며, 한개의 벤젠고리에 히드록시기(-OH)가 결합된 형태를 가지고 있다. 벤조페논-3은 내분비계교란화합물(Endocrine disrupting chemical)로서 생식독성, 발달독성, 갑상선 및 내분비계 독성 등을 가지고 있는 것으로 알려져 있다. 벤조페논-3은 자외선을 흡수하는 특성이 있어, 헤어제품(hair product), 화장품, 자외선차단제 등에 사용된다. 본 연구에서는 대한민국 인구집단를 대표하는 국민환경보건기초조사(KoNEHS) 4주기(2018-2020)의 데이터를 이용하여 헤어제품 사용과 요중 벤조페논-3과의 연관성을 확인하고자 한다.
방법
KoNEHS 4주기의 데이터에서 19세 이상 성인 3,796명의 참가자를 분석하였다. 요중 벤조페논-의 75번째 백분위 수 농도를 기준으로 저농도군과 고농도군으로 나누었다. 연구대상의 요중 벤조페논- 3농도와 일반적 특성, 개인 및 위생용품사용, 해양생물 섭취, 플라스틱용품사용 간의 분포 및 평균을 비교하기 위하여 독립 t-검정과 χ2 테스트를 실시하였다. 헤어제품에 대한 요중 벤조페논-3 대한 승산비(ORs)는 일반적 특성, 개인 및 위생용품사용, 해양생물 섭취, 그리고 플라스틱용품 사용을 보정한 후 로지스틱 회귀분석을 사용하여 계산하였다.
결과
본 연구에서는 여성에서 헤어제품 ‘주 6회 미만 사용군’과 ‘주 6회 이상 사용군’은 ‘사용안함군’에 비해 요중 벤조페논-3 고농도군에 속할 OR 값이 증가하였다. 계산된 OR값은 ‘주 6회 미만 사용군’ 1.24(95% CI: 1.12-1.38), ‘주 6회 이상 사용군’ 1.54 (95% CI: 1.33-1.79)이었다.
결론
본 연구를 통해서 헤어제품 사용과 요중 벤죠페논-3과의 연관성을 확인할 수 있었다.

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Original Article

Relationship between crustacean consumption and serum perfluoroalkyl substances (PFAS): the Korean National Environmental Health Survey (KoNEHS) cycle 4: Sung Woo Huh, Seong-yong Cho, Seongyong Yoon, Daehwan Kim, Hyun Woo Park, Jisoo Kang, Keon Woo Kim; Ann Occup Environ Med 2024;36:e12. Published online April 19, 2024; DOI: https://doi.org/10.35371/aoem.2024.36.e12

Abstract Abstract in Korean PDF

Background

Perfluoroalkyl substances (PFASs) are non-aromatic organic compounds, whose hydrogen atoms in the carbon chain substituted by fluorine atoms. PFASs exhibit developmental toxicity, carcinogenicity, hepatotoxicity, reproductive toxicity, immunotoxicity, and hormone toxicity. PFASs are used in the production of disposable food packages, aircraft and automobile devices, cooking utensils, outdoor gear, furniture and carpets, aqueous film forming foam (AFFF), cables and wires, electronics, and semiconductors. This study aimed to determine the association between crustacean consumption and serum PFASs.

Methods

Adult participants (2,993) aged ≥ 19 years were extracted from the 4th cycle data of the Korean National Environmental Health Survey (KoNEHS). Based on the 50th percentile concentrations of serum PFASs, participants were divided into the low-concentration group (LC) and the high-concentration group (HC). General characteristics, dietary factors, coated product usage, and personal care product usage, an independent t-test and χ² test were analyzed. The odds ratio (OR) of serum PFAS concentration against crustacean consumption was estimated via logistic regression analysis adjusting for general characteristics, dietary factors, coated product usage, and personal care product usage.

Results

The OR for the HC of serum PFASs was higher in individuals with ≥once a week crustacean consumption than in those with < once a week crustacean consumption. Estimated ORs were perfluorohexanesulfonic acid 2.15 (95% confidence interval [CI]: 1.53–3.02), perfluorononanoic acid (PFNA) 1.23 (95% CI: 1.07–1.41), and perfluorodecanoic acid (PFDeA) 1.42 (95% CI: 1.17–1.74) in males, and perfluorooctanoic acid 1.48 (95% CI: 1.19–1.84), perfluorooctanesulfonic acid 1.39 (95% CI: 1.27–1.52), PFNA 1.70 (95% CI: 1.29–2.26) and PFDeA 1.43 (95% CI: 1.32–1.54) in females.

Conclusions

This study revealed the association between the crustacean consumption and concentrations of serum PFASs in general Korean population.

제4기(2018-2020) 국민환경보건 기초조사 자료를 이용한 갑각률 섭취와 혈청 괍불화화합물(PFAS)과의 관계
목적
과불화화합물은 탄소 사슬에 결합 되어 있는 수소 원자가 불소 원자로 대체된 비방향족 유기 화합물이다. PFAS 는 발달 독성, 발암성, 간 독성, 생식 독성, 면역 독성, 신경 독성 및 호르몬 독성 등을 가진다. PFAS는 일회용 식품 포장, 항공, 자동차, 조리기구, 아웃도어 용품, 가구 및 카펫, 수성막포, 케이블 및 배선, 전자 및 반도체 생산에 사용된다. 본 연구에서는 국가를 대표하는 조사인 한국 국민환경보건 기초조사(KoNEHS) 4주기의 데이터를 사용하여 갑각류 섭취와 혈청 PFAS노출과의 연관성을 확인하려고 한다.
방법
KoNEHS 4주기의 데이터에서 19세 이상 성인 2,993명의 참가자를 분석하였다. 혈청 PFAS 의 50번째 백분위 수 농도를 기준으로 저농도군과 고농도군으로 나누었다. 연구대상의 혈청 PFAS 농도와 일반적 특성, 식이요인, 코팅용품 사용, 미용제품 사용간의 분포 및 평균을 비교하기 위하여 독립 t-검정과 χ2 테스트를 실시하였다. 갑각류 섭취에 대한 혈청 PFAS의 승산비는 일반적 특성, 식이요인, 코팅용품 사용, 미용제품 사용을 보정한 후 로지스틱 회귀분석을 사용하여 계산하였다.
결과
본 연구에서는 갑각류 주1회이상 섭취군은 주1회미만 섭취군에 비해 혈청 PFAS 고농도군에 속할 OR 값이 증가하였다. 남성에서는 PFHxS 2.15(95% confidence interval [CI]; 1.53-3.02), PFNA 1.23(95% CI; 1.07-1.41), PFDeA 1.42(95% CI; 1.17-1.74), 여성에서는 PFOA 1.48(95% CI; 1.19-1.84), PFOS 1.39(95% CI; 1.27-1.52), PFNA 1.70(95% CI; 1.29-2.26), PFDeA 1.43(95% CI; 1.32-1.54) 이었다.
결론
갑각류 섭취 횟수가 많을수록 혈청 PFAS (PFOA, PFOS, PFHxS, PFNA, PFDeA) 농도가 증가하였다.

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Original Article

Relationship between the use of plastics in refrigerator food storage and urine phthalate metabolites: the Korean National Environmental Health Survey (KoNEHS) cycle 3: Jisoo Kang, Seong-yong Cho, Seongyong Yoon; Ann Occup Environ Med 2023;35:e53. Published online December 27, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e53

Abstract Abstract in Korean PDF

Background

Plastics are high-molecular-weight materials composed of long carbon chains. They are prevalent in daily life, present in various items such as food containers and microwavable packaging. Phthalates, an additive used to enhance their flexibility, are endocrine-disrupting chemicals. We utilized the data from the Korean National Environmental Health Survey (KoNEHS) cycle 3, representing the general South Korean population, to investigate the relationship between the use of plastics in refrigerator food storage and phthalate exposure.

Methods

We assessed 3,333 adult participants (aged ≥ 19 years) including 1,526 men and 1,807 women, using data from KoNEHS cycle 3. Using the 75th percentile concentration, urine phthalate metabolites were categorized into high and low-concentration groups. χ² test was conducted to analyze variations in the distribution of each variable, considering sociodemographic factors, health-related factors, food intake, the use of plastics, and the concentration of urine phthalate metabolites as the variables. To calculate odds ratios (ORs) for the high-concentration group of urine phthalate metabolites based on the use of plastics in refrigerator food storage, logistic regression analysis was conducted.

Results

In men, the use of plastics in refrigerator food storage had significantly higher adjusted ORs compared to those using the others. The adjusted ORs were calculated as follows: mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) had an OR of 1.35 (95% confidence interval [CI]: 1.05–1.72), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP) had an OR of 1.48 (95% CI: 1.16–1.88), mono-(2-ethyl-5-carboxypentyl) phthalate (MECPP) had an OR of 1.32 (95% CI: 1.04–1.66), ∑di(2-ethylhexyl) phthalate (∑DEHP) had an OR of 1.37 (95% CI: 1.08–1.74) and mono-n-butyl phthalate (MnBP) had an OR of 1.44 (95% CI: 1.13–1.84).

Conclusion

The concentrations of urine phthalate metabolites (MEHHP, MEOHP, MECPP, ∑DEHP, and MnBP) were significantly higher in men who used plastics in refrigerator food storage compared to those using the others.

제3기(2015-2017) 국민환경보건 기초조사 자료를 이용한 냉장고 식품보관 시 플라스틱을 사용하는 경우와 요중 프탈레이트 대사체간의 관계
목적
플라스틱은 긴 탄소 사슬로 구성된 고분자 물질로 일상생활에서 식품용기, 전자레인지용 포장용기 등 다양한 곳에서 사용되고 있다. 프탈레이트는 플라스틱의 유연성을 증가시키는 가소제로 사용되는데, 이는 내분비계 장애물질로 알려져있다. 본 연구에서는 우리나라 인구를 대표하는 자료인 국민환경보건 기초조사 3기를 이용하여 가정내 냉장고 식품보관 시 플라스틱을 사용하는 경우와 요중 프탈레이트 대사체와의 연관성을 조사하였다.
방법
본 연구는 국민환경보건 기초조사 3기에서 3,333명의 19세 이상 성인을 연구 대상자로 선정하였다. (남자: 1,526명 여자: 1,807명) 요중 프탈레이트 대사체는 75th percentile값을 기준으로 요중 프탈레이트 대사체 고농도군과 저농도군으로 정의하였다. 사회인구학적 요인, 건강행태 요인, 식이요인과 플라스틱 사용, 요중 프탈레이트 대사체 농도간의 분포를 분석하기위해 χ2-test를 사용하였다. 또한 로지스틱 회귀분석을 사용하여 가정내 냉장고 식품보관 시 플라스틱을 사용하는 경우와 요중 프탈레이트 대사체 고농도군에 속할 OR값을 계산하였다.
결과
남성에서 가정내 냉장고 식품보관시 플라스틱을 사용하는 경우 플라스틱을 사용하지 않는 경우보다 요중 프탈레이트 대사체 농도가 높았다. 플라스틱을 사용하는 경우 MEHHP의 고농도군에 해당될 adjusted ORs은 1.35(95%CI: 1.05-1.72), MEOHP 1.48(95%CI: 1.16-1.88), MECPP 1.32(95%CI: 1.04-1.66), ∑DEHP 1.37(95%CI: 1.08-1.74), MnBP 1.44(95%CI: 1.13-1.84)으로 조사되었다.
결론
남성에서 가정내 냉장고 식품 보관 시 플라스틱을 사용하는 경우는 플라스틱을 사용하지 않는 경우보다 요중 프탈레이트 대사체(MEHHP, MEOHP, MECPP, ∑DEHP, MnBP) 농도가 높았다.

Citations

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Original Article

The relationship between fatigue and sickness absence from work: Minsun Kim, Jiho Kim, SeongCheol Yang, Dong-Wook Lee, Shin-Goo Park, Jong-Han Leem, Hwan-Cheol Kim; Ann Occup Environ Med 2023;35:e32. Published online August 10, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e32

Abstract Abstract in Korean PDF

Background

Although many studies have been conducted on worker fatigue and sickness absence, the association between fatigue and sickness absence is unclear in Korean workers. This study was conducted to investigate the effect of worker fatigue on future sickness absence.

Methods

The study was conducted on workers who received medical check-ups at a university hospital for two consecutive years (2014–2015). During check-ups in the first year, the Fatigue Severity Scale (FSS) was used to assess fatigue levels, and during check-ups in the second year, sickness absence was surveyed to determine whether they had been absent from work due to physical or mental illness during previous 12 months. The χ² test was used to analyze relationships between sociodemographic and occupational characteristics, fatigue levels, and sickness absence. Odds ratios (ORs) were calculated by logistic regression analysis controlled for confounding factors.

Results

A total of 12,250 workers were included in the study, and 396 (3.2%) workers experienced more than one day of sickness absence during the study period. Adjusted ORs for sickness absence were 3.35 (95% confidence interval [CI]: 2.64–4.28) in the moderate-fatigue group and 6.87 (95% CI: 4.93–9.57) in the high-fatigue group versus the low-fatigue group. For men in the moderate- and high-fatigue groups, adjusted ORs for sickness absence were 3.40 (95% CI: 2.58–4.48) and 8.94 (95% CI: 6.12–13.07), and for women in the moderate- and high-fatigue groups, adjusted ORs for sickness absence were 2.93 (95% CI: 1.68–5.10) and 3.71 (95% CI: 1.84–7.49), respectively.

Conclusions

Worker fatigue is associated with sickness absence during the following 12 months, and this association appears to be stronger for men than women. These results support the notion that sickness absence can be reduced by evaluating and managing work-related fatigue.

근로자의 피로와 질병 결근의 연관성
목적
근로자의 피로와 질병 결근에 관한 많은 연구가 이루어졌으나, 한국 근로자의 피로와 질병 결근의 연관성은 불분명하다. 본 연구는 근로자의 피로가 미래의 질병 결근에 미치는 영향을 조사하기 위해 수행되었다.
방법
본 연구는 2년 연속(2014년-2015년) 대학병원에서 건강검진을 받은 근로자들을 대상으로 실시되었다. 첫번째 2014년 건강검진에서는 피로 심각도 척도를 이용하여 피로도를 평가했고, 다음해인 2015년 건강검진에서는 같은 근로자를 대상으로 지난 12개월 간 신체적 질환 또는 정신적 질환으로 인한 결근한 적이 있는지를 조사했다. χ2 분석으로 사회인구학적 특성과 직업적 특성, 피로도와 질병 결근의 연관성을 분석하였다. 오즈비는 교란 요인들을 통제 후 로지스틱 회귀 분석을 통해 측정되었다.
결과
연구 대상에는 총 12,250명의 근로자가 포함되었으며, 12개월 동안 396명(3.2%)의 근로자가 하루 이상의 질병 결근을 하였다. 질병 결근에 대한 조정된 오즈비는 낮은 피로 그룹에 비해 중간 피로 그룹에서 3.35 (95% CI: 2.64-4.28), 고 피로 그룹에서 6.87 (95% CI: 4.93-9.57)였다. 남성의 질병 결근에 대한 조정된 오즈비는 중간 피로 그룹에서 3.40 (95% CI: 2.58-4.48), 고 피로 그룹에서 8.94 (95% CI: 6.12-13.07)였으며, 여성의 질병 결근에 대한 조정된 오즈비는 중간 피로 그룹에서 2.93 (95% CI: 1.68-5.10), 고 피로 그룹에서 3.71 (95% CI: 1.84-7.49)이었다.
결론
근로자의 피로는 이후 12개월 동안의 질병 결근과 관련이 있으며, 이 연관성은 여성보다 남성에게 더 강한 것으로 보인다. 이러한 결과는 업무 관련 피로를 평가하고 관리함으로써 질병 결근을 줄일 수 있다는 개념을 뒷받침한다.

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Crystal Lee, Jeong Su Oh
Nucleic Acids Research.2025;[Epub] CrossRef

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1 Web of Science
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Original Article

Incidence rates of injury, musculoskeletal, skin, pulmonary and chronic diseases among construction workers by classification of occupations in South Korea: a 1,027 subject-based cohort of the Korean Construction Worker’s Cohort (KCWC): Seungho Lee, Yoon-Ji Kim, Youngki Kim, Dongmug Kang, Seung Chan Kim, Se-Yeong Kim; Ann Occup Environ Med 2023;35:e26. Published online July 24, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e26

Abstract Abstract in Korean PDF Supplementary Material

Background

The objective of this study is to investigate the differences in incidence rates of targeted diseases by classification of occupations among construction workers in Korea.

Methods

In a subject-based cohort of the Korean Construction Worker’s Cohort, we surveyed a total of 1,027 construction workers. As occupational exposure, the classification of occupations was developed using two axes: construction business and job type. To analyze disease incidence, we linked survey data with National Health Insurance Service data. Eleven target disease categories with high prevalence or estimated work-relatedness among construction workers were evaluated in our study. The average incidence rates were calculated as cases per 1,000 person-years (PY).

Results

Injury, poisoning, and certain other consequences of external causes had the highest incidence rate of 344.08 per 1,000 PY, followed by disease of the musculoskeletal system and connective tissue for 208.64 and diseases of the skin and subcutaneous tissue for 197.87 in our cohort. We especially found that chronic obstructive pulmonary disease was more common in construction painters, civil engineering welders, and civil engineering frame mold carpenters, asthma in construction painters, landscape, and construction water proofers, interstitial lung diseases in construction water proofers.

Conclusions

This is the first study to systematically classify complex construction occupations in order to analyze occupational diseases in Korean construction workers. There were differences in disease incidences among construction workers based on the classification of occupations. It is necessary to develop customized occupational safety and health policies for high-risk occupations for each disease in the construction industry.

한국 건설업 종사자의 손상, 근골격계 질환, 피부, 호흡기 및 만성질환의 건설 직종에 따른 발생률: 한국 건설업 종사자 코호트(KCWC) 의 1027명 대상자 기반 세부 코호트 분석
목적
본 연구의 목적은 한국 건설업 종사자에 있어 주요 질환의 건설 직종별 발생률 차이를 알아보는 것이다.
방법
한국 건설업 종사자 코호트(KCWC)의 대상자 기반 세부 코호트로 총 1,027명의 건설업 종사자가 1:1면접설문조사를 통해 입적되었다. 직업적 노출요인으로 직종은 크게 건설산업환경과 직무 두 가지 축으로 분류되었다: 직업적 노출(설문조사) 자료와 국민건강보험공단 청구 맞춤형 자료를 연계하여 질환의 평균 발생률을 분석하였다. 주요 질환은 건설업 종사자에서 유병률이 높거나 업무 관련성이 있을 것으로 추정되는 11개의 대상 질환을 평가하였다. 질환별 평균 발생률은 1,000인년당 발병 사례수(명)으로 계산하였다.
결과
손상, 중독 및 외인에 의한 특정 기타 결과가 1,000인년당 344.08명으로 가장 높은 발생률을 보였고, 그 다음으로 근골격계 및 결체조직의 질환이 1,000인년당 208.64명, 피부 및 피하조직 질환이 1,000인녕당 197.87명 순으로 높았다. 특히, 만성 폐쇄성 폐질환이 건축 도장공, 토목 용접공, 토목 형틀목공에서 타 직종에 비해 상대적으로 높은 발생률을 보였고, 천식은 건축 도장공, 조경, 건축 방수공에서, 간질성 폐질환은 건축 방수공에서 상대적으로 높은 발생률을 보였다.
결론
본 연구는 한국 건설업 종사자의 주요 직업성 질환 및 호발 질환 등을 복잡한 건설산업의 직종을 체계적으로 분류하여 분석한 최초의 연구로 연구진들은 건설업 종사자의 질환별 발생률에 있어 직종별 차이를 확인하였다. 건설 산업에서 각 질환별 고위험 직종별로 맞춤형 산업안전보건정책 개발이 필요하다.

Citations

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Occupational disease monitoring by the Korea Occupational Disease Surveillance Center: a narrative review
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The Ewha Medical Journal.2025;[Epub] CrossRef
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Weiner Santos, Alejandro Lorente, Carmen Rojas, Rui Isidoro, Ana Dias, Gonzalo Mariscal, Ahmed Hamdy Zabady, Rafael Lorente
Frontiers in Public Health.2025;[Epub] CrossRef
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Original Article

Correlation of commute time with the risk of subjective mental health problems: 6^th Korean Working Conditions Survey (KWCS): Hyo Choon Lee, Eun Hye Yang, Soonsu Shin, Seoung Ho Moon, Nan Song, Jae-Hong Ryoo; Ann Occup Environ Med 2023;35:e9. Published online May 11, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e9

Abstract Abstract in Korean PDF

Background

Studies conducted so far on the link between commute time and mental health among Koreans remain insufficient. In this study, we attempted to identify the relationship between commute time and subjective mental health using the 6^th Korean Working Conditions Survey (KWCS).

Methods

Self-reported commute time was divided into four groups: ≤ 30 (group 1), 30–60 (group 2), 60–120 (group 3), and > 120 minutes (group 4). Subjective depression was defined as a score of 50 points or less on the WHO-5 well-being index. Subjective anxiety and fatigue were defined as answering ‘yes’ to the questionnaire on whether they had experienced it over the past year. The analysis of variance, t-test, and χ² test was used to analyze the differences among the characteristics of the study participants according to commute time, depression, anxiety, and fatigue. Odds ratios (ORs) and 95% confidence intervals (CIs) for depression, anxiety, and fatigue according to commute time were calculated using multivariate logistic regression models adjusted for sex, age, monthly income, occupation, company size, weekly working hours, and shift work status.

Results

Long commute times showed increased ORs and graded increasing trends for depression, anxiety, and fatigue. The ORs for depression increased significantly in group 2 (1.06 [1.01–1.11]), group 3 (1.23 [1.13–1.33]), and group 4 (1.31 [1.09–1.57]) compared to group 1 (reference). The ORs for anxiety increased significantly in group 2 (1.17 [1.06–1.29]), group 3 (1.43 [1.23–1.65]) and group 4 (1.89 [1.42–2.53]). The ORs for fatigue increased significantly in group 2 (1.09 [1.04–1.15]), group 3 (1.32 [1.21–1.43]), and group 4 (1.51 [1.25–1.82]).

Conclusions

This study highlights that the risk of depression, anxiety, and fatigue increases with commute time.

통근 시간과 주관적 정신건강문제 위험의 상관관계 : 제6차 한국근로환경조사
목적
한국인들의 통근 시간과 정신 건강의 관계에 대해 지금까지 수행된 연구는 매우 부족하다. 본 연구에서는 제6차 한국근로환경조사 자료를 이용하여 통근 시간과 주관적 정신건강의 관계를 규명하고자 하였다.
방법
자가 보고된 통근 시간은 30분 이하(1군), 30분-60분(2군), 60분-120분(3군), 120분 초과(4군)의 4개 그룹으로 분류하였다. 주관적 우울은 WHO-5 웰빙 지수 50점 이하인 경우로 정의하였다. 주관적 불안과 피로는 지난 1년간 이러한 증상을 경험한 적이 있는지에 대한 설문지에 '그렇다'고 대답한 경우로 정의하였다. 분산분석, T-검정 및 카이-제곱 검정을 사용하여 출퇴근 시간, 우울, 불안, 피로에 따른 연구 참여자들의 특성 차이를 분석하였다. 성별, 연령, 월 소득, 직업, 회사 규모, 주당 근로 시간, 교대근무 상태를 보정한 다변량 로지스틱 회귀모형을 이용하여, 통근 시간에 따른 우울, 불안, 피로에 대한 오즈비와 95% 신뢰구간을 산출하였다.
결과
긴 통근 시간은 우울, 불안, 피로에 대한 오즈비 증가 및 점진적인 상승 추세를 보여주었다. 우울에 대한 오즈비는 2군(1.06[1.01-1.11]), 3군(1.23[1.13-1.33])과 4군(1.31[1.09-1.57])에서 1군(참조군)에 비해 유의하게 증가하였다. 불안에 대한 오즈비는 2군(1.17[1.06-1.29]), 3군(1.43[1.23-1.65])과 4군(1.89[1.42-2.53])에서 유의하게 증가했다. 피로에 대한 오즈비는 2군(1.09[1.04-1.15]), 3군(1.32[1.21-1.43])과 4군(1.51[1.25-1.82])에서 유의하게 증가했다.
결론
본 연구는 출퇴근 시간이 증가함에 따라 우울증, 불안, 피로의 위험이 증가한다는 것을 강조한다.

Citations

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Study on the influence of commuting time on workers' health status and its mechanism
Yu Gan, Jing Zhang
Journal of Transport & Health.2025; 41: 102010. CrossRef
Association between commute time and loneliness: An analysis based on 2023 Seoul survey data
Baek-Yong Choi, Ji-Hyeon Lee, Seok-Yoon Son, Seung-Woo Ryoo, Jin-Young Min, Kyoung-Bok Min
Journal of Transport & Health.2025; 43: 102059. CrossRef
Six years of car driving experience: impact of psychological status, sleep, fatigue and quality of life in female drivers in Saudi Arabia: an online survey study
Thamir Al-khlaiwi, Dena S. Alsuhaibani, Hoor K. Aloraini, Jana I. Alhazmi, Razan A. Almohanna, Sara A. Alsheikh, Turkia A. Alsheik, Norah Alrashoud, Muhammad Iqbal
BMC Public Health.2025;[Epub] CrossRef
Association between sudden work recall and psychological health issues: a cross-sectional analysis of the 6th Korean Working Conditions Survey
Dong-Woo Kim, June-Hee Lee, In-Ho Lee, Kyung-Jae Lee
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How Does the Spatial Structure of the Furniture Industry Shape Urban Residents’ Health? Evidence from China Labor-Force Dynamics Survey and POI Data
Zigui Chen, Yuning Liu, Xiangdong Dai, Chao Chen, Zhenjun Wang, Andrew Wu
Sustainability.2025; 18(1): 345. CrossRef
Effects of Commuting Time of wage workers on Work-Family Conflict as a Living Environment Factor Using the 7th Working Environment Survey
In Ho Lee, Jeong Beom Lee
Journal of The Korean Society of Living Environmental System.2025; 32(6): 769. CrossRef

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Original Article

Relationship between visual display terminal working hours and headache/eyestrain in Korean wage workers during the COVID-19 pandemic: the sixth Korean Working Conditions Survey: Gayoung Kim, Seong-yong Cho, Jinseok Kim, Seongyong Yoon, Jisoo Kang, Si young Kim; Ann Occup Environ Med 2023;35:e8. Published online May 9, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e8

Abstract Abstract in Korean PDF

Background

Prolonged use of visual display terminal (VDT) can cause eyestrain, dry eyes, blurred vision, double vision, headache and musculoskeletal symptoms (neck, shoulder, and wrist pain). VDT working hours among workers have greatly increased during the coronavirus disease 2019 (COVID-19) pandemic. Therefore, this study aimed to investigate the relationship between VDT working hours and headache/eyestrain in wage workers using data from the sixth Korean Working Conditions Survey (KWCS) (2020–2021) conducted during the COVID-19 pandemic.

Methods

We analyzed the sixth KWCS data of 28,442 wage workers aged 15 years or older. The headache/eyestrain that occurred in the last year was assessed. The VDT work group included workers who use VDT always, almost always, and three-fourth of the working hours, while the non-VDT work group included workers who use VDT half of the working hours, one-fourth of the working hours, almost never, and never. To analyze the relationship between VDT working hours and headache/eyestrain, the odds ratios (ORs) and 95% confidence interval (CI) were calculated using logistic regression analysis.

Results

Among the non-VDT work group, 14.4% workers experienced headache/eyestrain, whereas 27.5% workers of the VDT work group experienced these symptoms. For headache/eyestrain, the VDT work group showed adjusted OR of 1.94 (95% CI: 1.80–2.09), compared with the non-VDT work group, and the group that always used VDT showed adjusted OR of 2.54 (95% CI: 2.26–2.86), compared with the group that never used VDT.

Conclusions

This study suggests that during the COVID-19 pandemic, as VDT working hours increased, the risk of headache/eyestrain increased for Korean wage workers.

코로나 19 유행 시기의 임금근로자에서 영상표시단말기(VDT) 작업시간과 두통/눈피로의 연관성: 제 6차 근로환경조사(KWCS)
목적
영상표시단말기(VDT)를 장시간 사용하면 눈의 피로, 안구 건조, 시야 흐림, 복시, 두통 및 근골격계 증상(목, 어깨 및 손목 통증)을 유발할 수 있다. 코로나19의 유행 동안 근로자들의 VDT 근로시간이 크게 증가했다. 본 연구는 코로나19 유행 시기에 실시된 제6차 KWCS(2020-2021) 자료를 활용하여 임금근로자의 VDT 근로시간과 두통/눈피로의 연관성을 조사하고자 하였다.
방법
본 연구는 15세 이상 임금근로자 28,442명을 대상으로 제6차 KWCS 자료를 분석하였다. 두통/눈피로는 지난 1년 동안 발생 여부로 확인하였다. 근무시간 내내, 거의 모든 근무시간, 근무시간 3/4 동안 VDT를 사용할 경우 VDT 작업군으로 분류하였고, 근무시간 절반, 근무시간 1/4, 거의 없음, 전혀 사용하지 않는 경우 VDT 비작업군으로 분류하였다. VDT 근무시간과 두통/눈피로의 관계를 분석하기 위해 로지스틱 회귀분석을 이용하여 승산비(OR)와 95% 신뢰구간(CI)을 계산하였다.
결과
본 연구는 15세 이상 임금근로자 28,442명을 대상으로 제6차 KWCS 자료를 분석하였다. 두통/눈피로는 지난 1년 동안 발생 여부로 확인하였다. 근무시간 내내, 거의 모든 근무시간, 근무시간 3/4 동안 VDT를 사용할 경우 VDT 작업군으로 분류하였고, 근무시간 절반, 근무시간 1/4, 거의 없음, 전혀 사용하지 않는 경우 VDT 비작업군으로 분류하였다. VDT 근무시간과 두통/눈피로의 관계를 분석하기 위해 로지스틱 회귀분석을 이용하여 승산비(OR)와 95% 신뢰구간(CI)을 계산하였다.
결론
본 연구는 코로나19 세계적 유행 기간 동안 VDT 근로시간이 증가함에 따라 한국 임금근로자의 두통/눈피로 위험이 증가함을 시사한다.

Citations

Citations to this article as recorded by

Occupational exposure to video display terminals: a systematic review of ocular and visual health effects and associated risk factors
Eva Artime-Ríos, Mar Seguí-Crespo, Begoña Doménech-Amigot, Mar Sánchez-Brau, Ana Suárez-Sánchez, José María Ramada-Rodilla
Journal of Occupational Health.2026;[Epub] CrossRef

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Original Article

Relationship between shellfish consumption and urinary phthalate metabolites: Korean National Environmental Health Survey (KoNEHS) cycle 3 (2015-2017): Jisoo Kang, Seong-yong Cho, Jinseok Kim, Seongyong Yoon, Jong-min An, Gayoung Kim, Si young Kim; Ann Occup Environ Med 2023;35:e2. Published online February 6, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e2

Abstract Abstract in Korean PDF

Background

Phthalates are endocrine disrupting chemicals that are widely used in the production of items of daily life such as in polyvinylchloride plastics, insecticides, and medical devices. This study aimed to determine the association between phthalate exposure and shellfish consumption using data from the Korean National Environmental Health Survey (KoNEHS) cycle 3 (2015–2017), which is a nationally representative survey.

Methods

In this study, we analyzed the KoNEHS cycle 3 data of 3,333 (1,526 men and 1,807 women) adults aged more than 19 years. Data related to the variables of sociodemographic factors, health-related behaviors, dietary factors, seafood consumption frequency, and urinary phthalate metabolites concentrations were collected. The concentrations of urinary phthalate metabolites of all the participants were divided into quartiles to define high and low concentration groups based on the 75th percentile concentration. A χ² test was conducted to analyze the distribution of independent variables. To analyze the relationship between shellfish consumption and phthalate exposure, the odds ratios (ORs) were calculated using logistic regression analysis.

Results

Total adults with shellfish consumption frequency of over once a week showed the following adjusted ORs for high concentrations of the following metabolites compared with the group that consumed shellfish once a week or less: 1.43 (95% confidence interval [CI]: 1.01–2.06) for mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP), 1.43 (95% CI: 1.01–2.03) for mono-(2-ethyl-5-carboxypentyl) phthalate (MECPP), 1.57 (95% CI: 1.10–2.24) for ∑di-2-ethylhexyl phthalate (∑DEHP), 2.01 (95% CI: 1.46–2.77) for mono-carboxyoctyl phthalate (MCOP), 1.56 (95% CI: 1.11–2.18) for mono-carboxy-isononly phthalate (MCNP), and 2.57 (95% CI: 1.85–3.56) for mono (3-carboxypropyl) phthalate (MCPP).

Conclusions

The concentrations of urinary phthalate metabolites (MEOHP, MECPP, ∑DEHP, MCOP, MCNP, and MCPP) were higher in adults with a higher frequency of shellfish consumption.

국민환경보건 기초조사 제3기(2015-2017) 자료를 이용한 조개류 섭취와 요중 프탈레이트 대사체간의 관계
목적
프탈레이트(phthalate)는 내분비계 장애물질(endocrine disrupting chemicals, EDCs)로서, 일상생활에서 가소제, 살충제, 의료기기 등으로 광범위하게 사용되고 있다. 프탈레이트는 해양 생태계에서 널리 발견되며, 조개류는 해양생태계오염의 대표적인 지표로 사용된다. 현재까지 해양 생태계의 프탈레이트의 오염에 대한 다양한 연구가 수행되고 있으나 국내에서 프탈레이트 노출과 조개류 섭취와 관련된 연구는 아직 이루어진 바가 없다. 따라서 본 연구에서는 우리나라 인구를 대표하는 자료인 국민환경보건 기초조사 제3기(2015-2017) 자료를 이용하여 요중 프탈레이트 대사체와 조개류 섭취와의 연관성을 분석하고자 했다.
방법
본 연구는 국민환경보건 기초조사 제3기(2015-2017) 자료를 이용하여 만 19세 이상 성인 3,333명(남자1,526명과 여자1,807명)을 대상으로 진행하였다. 사회인구학적 변수 및 건강행태 관련 변수 및 식이 요인과 해산물의 섭취 빈도, 요중 프탈레이트 대사체 농도를 변수로 두어 각 변수 간의 분포 차이를 분석하였다. 로지스틱 회귀분석을 사용하여 조개류 섭취빈도에 따라 요중 프탈레이트 대사체 고농도군에 속할 OR값을 계산하였다.
결과
조개류 섭취의 경우 주 1회 초과군에서 MEOHP의 고농도군에 해당될 adjusted ORs은 1.43(95%CI: 1.01-2.06), MECPP 1.43(95%CI: 1.01-2.03), ∑DEHP 1.57(95%CI: 1.10-2.24), MCOP 2.01(95%CI: 1.46-2.77), MCNP 1.56(95%CI: 1.11-2.18), MCPP 2.57(95%CI: 1.85-3.56)으로 조사되었다.
결론
성인에서 조개류 섭취 빈도가 많을수록 요중 프탈레이트 대사체(MEOHP, MECPP, ∑DEHP, MCOP, MCNP, MCPP) 농도가 높았다.

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Original Article

Relationship between workplace violence and work-related depression/anxiety, separating the types of perpetrators: a cross-sectional study using data from the fourth and fifth Korean Working Conditions Surveys (KWCS): Na-Rae Lee, Sang-Woo Kim, Jae-Han Joo, Jae-Han Lee, June-Hee Lee, Kyung-Jae Lee; Ann Occup Environ Med 2022;34:e13. Published online June 10, 2022; DOI: https://doi.org/10.35371/aoem.2022.34.e13

Abstract Abstract in Korean PDF Supplementary Material

Background

Work is an inseparable element of a person’s life, and violence in the workplace has various effects on individual workers and companies. While most studies have focused on specific industries, very few studies have investigated the influence of workplace violence by co-workers. Therefore, this study aimed to evaluate the association between workplace violence and work-related depression/anxiety in various occupations by differentiating the perpetrators of violence as co-workers and clients.

Methods

This study was conducted based on data from the 4th and 5th Korean Working Conditions Surveys (KWCS). The experience of workplace violence was classified in terms of the perpetrator: workplace violence by co-workers and that by clients. Work-related depression and anxiety were assessed using questions about health problems related to depression and anxiety and whether the problems were related to work. Descriptive statistics, χ² tests, and multiple logistic regression analyses were performed using the SPSS 26.0.

Results

After adjusting for sociodemographic characteristics (age, education, income, subjective health status) and occupational characteristics (occupation, weekly working hours, type of employment, size of workplace, and shift work), male workers with experience of workplace violence by co-workers were found to be at a higher risk of work-related depression/anxiety (odds ratio [OR], 11.52; 95% confidence interval [CI], 8.65–15.36). The same was confirmed for female workers (OR, 10.89; 95% CI, 7.90–15.02).

Conclusions

Employees who experienced workplace violence from co-workers were found to be more vulnerable to work-related depression/anxiety. Continuous contact between the victim and the perpetrator may occur, and the possibility of a secondary assault can frighten the victim. Appropriate prevention and intervention measures that focus on the perpetrators of violence are needed.

가해자 유형별 작업장 폭력과 업무 관련 우울/불안의 연관성
목적
작업장 폭력은 근로환경에서 타인에게 의도적으로 상해, 사망, 정신적 손상, 발달장애 또는 결핍을 일으키는 행위나 위협을 가하는 것으로, 근로자의 신체적·정신적 건강에 부정적 영향을 미치며 기업의 생산성을 저해한다. 작업장 폭력에 대한 대다수의 연구는 특정 직종에 초점을 맞추고 있어 직장 동료에 의해 내부에서 발생하는 작업장 폭력의 영향이 잘 반영되지 않을 수 있다. 본 연구를 통해 가해자 유형별 업무 관련 우울/불안의 연관성을 비교‧확인하고자 한다.
방법
제 4차 및 제 5차 근로환경조사를 바탕으로, 만 18세 이상 피고용자 55,201 명에서 작업장 폭력에 대한 경험과 그 가해자 및 업무 관련 우울/불안 유무를 분석하였다. SPSS 26.0을 통해 기술통계, 카이제곱검정 및 다중로짓회귀분석을 시행했고, 직장 동료 혹은 고객에 의해 작업장 폭력을 경험한 근로자에서 작업장 폭력을 경험하지 않은 근로자에 비해 업무 관련 우울/불안이 있을 위험에 대한 Odds ratio [OR]를 구하였다.
결과
성별을 막론하여 직장 동료 혹은 고객에 의해 작업장 폭력을 경험한 근로자의 경우 작업장 폭력을 경험하지 않은 근로자에 비해 업무 관련 우울/불안의 빈도가 유의하게 높았다. 작업장 폭력을 경험한 남성 근로자에서 업무 관련 우울/불안에 대한 OR은 가해자가 직장 동료일 경우 11.52 (95% Confidence interval [CI] 8.65-15.36), 고객일 경우 5.06 (95% CI 3.73-6.88)으로 나타났으며, 여성 근로자의 경우에도 마찬가지로 가해자가 직장 동료일 경우 OR 10.89 (95% CI 7.90-15.02), 고객일 경우 OR 4.94 (95% CI 3.77-6.47)로 나타났다.
결론
작업장 폭력을 경험한 근로자는 작업장 폭력 경험이 없는 근로자에 비해 업무 관련 우울/불안의 위험이 더 크다. 작업장 폭력의 가해자가 직장 동료일 경우, 피해자와 가해자가 동일 작업장 내에서 지속적으로 접촉하여 폭력에 대한 반복적인 회상 또는 2차 가해 등이 이루어지기 쉬운 환경이 조성되기 때문에 고객에 의한 작업장 폭력에 비해 업무 관련 우울/불안의 위험이 더 크게 나타날 수 있다. 작업장 폭력의 가해자를 고려한 적절한 예방 및 중재 조치가 필요하며, 해당 분야에 대해 후속 연구가 이루어져야 할 것으로 생각된다.

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Original Article

Analysis of self-reported mental health problems among the self-employed compared with paid workers in the Republic of Korea: Yongho Lee, Junhyeong Lee, Ui-Jin Kim, Eunseun Han, Seunghon Ham, Won-Jun Choi, Seong-Kyu Kang, Wanhyung Lee; Ann Occup Environ Med 2022;34:e8. Published online April 8, 2022; DOI: https://doi.org/10.35371/aoem.2022.34.e8

Abstract Abstract in Korean PDF

Background

As self-employed workers are vulnerable to health problems, this study aimed to analyze mental health problems and sleep disturbances among self-employed workers compared with paid workers in Korea.

Methods

A total of 34,750 workers (23,938 paid workers and 10,812 self-employed workers) were analyzed from the fifth Korean Working Condition Survey, which included 50,205 households collected by stratified sampling in 2017. To compare mental health problems and sleep disturbance among self-employed workers and paid workers, multivariate logistic regression analyses were performed.

Results

The odds ratio in self-employed workers compared with paid workers was 1.25 (95% confidence interval [CI]: 1.09–1.42) for anxiety, 1.11 (95% CI: 1.04–1.17) for overall fatigue, 1.11 (95% CI: 1.04–1.20) for difficulty falling asleep, 1.10 (95% CI: 1.02–1.18) for difficulty maintaining sleep and 1.24 (95% CI: 1.16–1.32) for extreme fatigue after waking up.

Conclusions

Self-employed workers in Korea have a higher risk of self-reported mental health problems and sleep disturbances than paid workers. Further studies with a longitudinal design and structured evaluation are required to investigate the causal relationship between health problems and self-employment.

한국 자영업자의 주관적 정신건강 문제 : 제 5차 근로환경조사를 이용하여
목적
자영업자는 고용, 사업체 운영 등에 대한 스트레스를 받고 있으며 자신들의 건강관리에 취약한 것으로 여겨지고 있다. 이 연구는 자영업자들에게 초점을 맞춰 유급근로자들과 비교하여 정신건강 문제와 수면 장애를 분석하는 것을 목표로 하였다.
방법
이 연구는 한국의 5차 근로환경조사 데이터를 바탕으로 23,938명의 유급근로자와 10,812명의 자영업자들을 선택하여 분석을 수행하였다. 정신건강 문제는 ‘우울감’, ‘불안감’, ‘전신 피로’에 대한 설문과 수면 장애는 ‘잠들기가 어려움’, ‘자는 동안 반복적으로 깨어남’, ‘기진맥진함 또는 극도의 피곤함을 느끼며 깨어남’ 설문의 답변을 이용하였다. 자영업자의 정신건강 문제와 수면 장애를 분석하기 위해 다변량 로지스틱 회귀 분석을 시행하였다.
결과
자영업자에서의 ‘불안감’에 대한 보정된 오즈비는 1.25 (95% CI=1.09-1.42), ‘전신피로’는 1.11 (95% CI=1.04-1.17), ‘잠들기가 어려움’은 1.11 (95% CI=1.04-1.20), ‘자는 동안 반복적으로 깨어남’은 1.10 (95% CI=1.02-1.18) 그리고 ‘기진맥진함 또는 극도의 피곤함을 느끼며 깨어남’은 1.24 (95% CI=1.16-1.32)이었다.
결론
본 연구는 유급근로자에 비해 자영업자들의 정신건강 문제와 수면 장애의 위험성이 높은 것을 확인할 수 있었다. 자영업자들의 건강 보호와 증진을 위해 구조화된 설문, 전향적 연구 등의 추가적인 연구와 사회의 관심이 필요하다.

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Original Article

Association between urinary trans,trans-muconic acid and diabetes: a cross-sectional analysis of data from Korean National Environmental Health Survey (KoNEHS) cycle 3 (2015–2017): Eun Hye Yang, Do Jin Nam, Hyo Choon Lee, Soon Su Shin, Jae-Hong Ryoo; Ann Occup Environ Med 2021;33:e35. Published online December 6, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e35

Abstract Abstract in Korean PDF Supplementary Material

Background

Benzene is a ubiquitous air pollutant that is well known to cause hematopoietic effects in humans including leukemia. Recently, several studies have discussed its non-carcinogenic effects such as diabetes. This study aimed to investigate the association between diabetes and urinary trans,trans-muconic acid (t,t-MA), one of benzene metabolite, using adult data from Korean National Environmental Health Survey (KoNEHS) cycle 3 (2015–2017).

Methods

This study analyzed 3,777 adults (1,645 men and 2,132 women) from the KoNEHS cycle 3 (2015–2017). The distribution and fraction of each independent variable were presented separately according to the urinary benzene metabolite levels (t,t-MA quartiles) and diabetes to determine the general characteristics of the subjects. Odds ratios (ORs) were calculated using logistic regression after stratification by gender and smoking status to identify the association between urinary t,t-MA and diabetes.

Results

Compared with the first quartile (reference), the risk of diabetes significantly increased above the 4th (1.834 [1.107–3.039]) quartile in men and above the 3rd (1.826 [1.095–3.044]) and 4th (2.243 [1.332–3.776]) quartiles in women after adjustment. Stratified analysis based on smoking revealed that the ORs for the 3rd (1.847 [1.146–2.976]) and 4th (1.862 [1.136–3.052]) quartiles in non-smokers and those for the 2nd (1.721 [1.046–2.832]), 3rd (1.797 [1.059–3.050]), and 4th (2.546 [1.509–4.293]) quartiles in smokers were significantly higher.

Conclusions

We confirmed that urinary t,t-MA is significantly associated with diabetes regardless of gender and smoking status. And further studies are necessary to access the clinical impacts of this findings.

소변 내 뮤콘산 농도와 당뇨의 연관성 : 제 3기 국민환경보건기초조사(2015-2017)를 이용한 단면연구
목적
본 연구는 일반인구집단을 대상으로 환경적인 벤젠 노출과 당뇨와의 연관성을 알아보기 위해 제 3기 국민환경보건기초조사 성인 데이터를 이용하여 벤젠 대사물질 중 하나인 소변 내 뮤콘산의 농도와 당뇨와의 관계를 알아보았다.
방법
제 3기 국민환경보건기초조사 성인 3,777명(남성 1,645명, 여성 2,132명)을 분석하였다. 대상자의 일반적인 특성을 확인하기 위해 각 독립변수의 분포 및 분율을 소변 내 뮤콘산 농도(사분위수)와 당뇨유무에 따라 제시하였다. 소변 내 뮤콘산 농도와 당뇨와의 연관성을 알아보기 위해 성별과 흡연으로 각각 층화 후 로지스틱 회귀분석을 사용하여 오즈비를 구하였다.
결과
보정 후, 남성은 제 4사분위 구간 1.834(1.106-3.039), 여성은 제 3사분위 구간 1.825(1.095-3.044), 제 4사분위 구간 2.241(1.331-3.773)에서 오즈비가 유의하게 증가하였으며, 소변 내 뮤콘산 농도가 증가할수록 당뇨위험이 증가하는 경향성을 보였다. 흡연으로 층화 후 분석한 결과 비흡연자의 경우 제 3분위수 1.847(1.146-2.976), 제 4분위수 1.861(1.135-3.050), 흡연자의 경우 제 2분위수 1.721(1.046-2.832), 제 3분위수 1.796(1.058-3.048), 제 4분위수 2.544(1.509-4.291)가 보정 후 통계적으로 유의하였다.
결론
본 연구에서 벤젠 대사체인 소변 내 뮤콘산 농도가 성별과 흡연 상태에 관계없이 당뇨와 유의하게 관련이 있다는 것을 확인하였으며, 추후 환경적인 벤젠 노출에 대한 당뇨 연관성에 대하여 연구가 필요하다.

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Original Article

The association between direct supervisor's behavior and employee presenteeism in Korean wage workers: findings from the fifth Korean Working Condition Survey: Sung Hee Lee, Joo Hyun Sung, Dae Hwan Kim, Chang Sun Sim; Ann Occup Environ Med 2021;33:e30. Published online September 24, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e30

Abstract PDF Supplementary Material

Background

Presenteeism is a phenomenon in which employees go to work, but physical or mental health problems make it impossible for them to properly demonstrate their abilities, and productivity decreases accordingly. Recent studies have considered the behavior of direct supervisors to be an important factor in the pathogenesis of various health-related outcomes. This study aimed to investigate the association between the direct supervisor's behaviors and presenteeism among wage workers in South Korea.

Methods

A total of 25,798 participants from the fifth Korean Working Condition Survey conducted in 2017 were included in the analysis. The behaviors of direct supervisor were assessed by 6 questionnaire items. In this study, the distribution of the scores was categorized into 4 categories (very good, good, bad, and very bad). To assess presenteeism, the corresponding questionnaire item was used. χ² tests and multiple logistic regression analyses adjusted for general, occupational, and psychosocial factors were performed to determine the association between the behaviors of direct supervisor and presenteeism.

Results

Direct supervisor's behavior were significantly associated with presenteeism. The adjusted odds ratios (aORs) of presenteeism in the good, bad, and very bad groups were 1.297 (95% confidence interval [CI]: 1.153–1.458), 1.191 (95% CI: 0.941–1.507), and 1.604 (95% CI: 1.184–2.175), compared with the very good group. Associations between presenteeism and the behaviors of direct supervisor were significant in male workers, but not in female workers. For male workers, the aORs of presenteeism in the good, bad, very bad groups were 1.661 (95% CI: 1.425–1.936), 1.445 (95% CI: 1.053–1.982), 2.340 (95% CI: 1.569–3.491), respectively.

Conclusions

This study suggests that the behavior of a direct supervisor can influence the occurrence of presenteeism, particularly in men. The proper management of senior employee's behaviors is necessary to reduce the risk of presenteeism in the workplace.

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Mohammad Soliman, Neveen A. Kohaf, Islam Elgammal, Francesca Dal Mas, Ali Mohsin Salim BaAwain
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Reasons behind sickness presenteeism: insights from four national surveys in Latvia
Svetlana Lakiša, Inese Gobina, Ivars Vanadziņš, Linda Matisāne
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Association Between Sickness Presenteeism and Depressive Symptoms by Occupation and Employment Type During the COVID-19 Pandemic
Minkoo Kang, Won-Tae Lee, Byungyoon Yun, Jin-Ha Yoon
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Ünal Saki, Mehmet Öztaş
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Original Article

Association between split shift work and work-related injury and disease absence: Kwon Ko, Jae Bum Park, Kyung-Jong Lee, Inchul Jeong; Ann Occup Environ Med 2021;33:e27. Published online August 19, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e27

Abstract PDF Supplementary Material

Background

Shift work (particularly split shifts) has been noted among the working conditions that hinder sustainable work. However, little is known regarding the effects of split shifts on health. This study aimed to investigate the association between split shift work and work-related injury and disease absence.

Methods

This study used data from the fifth Korean Working Conditions Survey and included 4,042 paid shift workers. Shift work type and self-reported work-related injury and disease absence were investigated using a questionnaire. Logistic regression analysis was performed to investigate the association between split shift work and work-related absence with rotating shift worker as the reference group.

Results

Of the 4,042 shift workers, 980 (24.3%) were split shift workers. The adjusted odds ratio (aOR) of split shift for absence due to work-related injury was high at 2.94 (95% confidence interval [CI]: 1.85–4.68) and the aOR of split shift for absence due to work-related disease was also high at 1.58 (95% CI: 1.09–2.29) compared to rotating shift.

Conclusions

Split shift work leads to an increased risk of absences due to work-related injury and disease.

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Research Article

Relationship between fatigue severity scale and occupational injury in Korean workers: Hyeonwoo Ju, Hwan-Cheol Kim, Sung Wook Jang, Youna Won, Shin-Goo Park, Jong-Han Leem; Ann Occup Environ Med 2021;33:e15. Published online May 4, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e15

Abstract PDF

Background

The aim of this study is to investigate the relationship between fatigue and occupational injury.

Methods

This study was conducted at a university hospital in 2014 and 2015. In 2014, the fatigue severity scale (FSS) was used to evaluate workers' fatigue levels. Later, when the same workers were examined in 2015, a questionnaire survey was conducted to determine whether they had experienced absences or treatment for work-related accidents. The χ² test was used to analyse the relationship between demographic characteristics, fatigue levels, and occupational injuries. After controlling for confounders, a logistic regression analysis was performed to calculate the odds ratios (ORs).

Results

In 2014, 19,218 workers were screened during health examination and their fatigue level were evaluated using FSS questionnaires. in 2015, workers' occupational injury was evaluated. In result, men in the moderate- and high-fatigue groups, after adjusting for age, smoking and drinking habits, chronic diseases, and occupational factors such as size of company industrial classification and type of work (shift or non-shift), adjusted ORs for hospital treatment due to occupational injury were 1.76 (95% confidence interval [CI]: 1.39–2.24) and 2.61 (95% CI:1.68–4.06), respectively. Among men in the medium- and high-fatigue groups, the adjusted ORs for absence due to occupational injury were 2.06 (95% CI: 1.52–2.80) and 3.65 (95% CI: 2.20–6.05), respectively. No significant association was observed between fatigue and occupational injury in women.

Conclusions

Male workers with high fatigue levels have a higher risk of experiencing work injuries. This study suggests that active intervention be considered to prevent injuries in workers with high scores on workplace fatigue evaluation scales.

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Research Article

Association between nicotine dependency with occupational injury in Korean men: Sung Wook Jang, Hwan-Cheol Kim, Ji Ho Kim, Min Sun Kim, Youna Won, Hyeonwoo Ju, Hyung Doo Kim, Go Choi, Shin-Goo Park, Jong-Han Leem; Ann Occup Environ Med 2021;33:e14. Published online May 4, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e14

Abstract PDF Supplementary Material

Background

The relationship between smoking status or second-hand smoking and occupational injuries has been the subject of considerable study, but few have studied the relationship between nicotine dependence and occupational injuries. The objective of this study was to investigate the relationship between nicotine dependence and occupational injury among employees at a range of Korean companies.

Methods

Initially, the personal and occupational characteristics and nicotine dependences of workers were measured, and 12 months later a survey was used to determine whether subjects had experienced any occupational injury. This study was conducted in several workplaces on 6,893 male workers in manufacturing and service industries that received health screening at Inha University Hospital in Incheon.

Results

The adjusted odds ratios (ORs) of occupational injury in the low, moderate, and high nicotine dependence groups were 1.38 (95% confidence interval [CI]: 1.04–1.84), 1.52 (95% CI: 1.10–2.10), and 1.71 (95% CI: 0.92–3.19), respectively. For smokers only, adjusted ORs tended to increase linearly (p for trend < 0.05). When only smokers were included, analysis of continuous FTND (Fagerstrom Test of Nicotine Dependence) scores showed that adjusted OR increased by 1.10 (95% CI: 1.03–1.19) per FTND point. After stratifying the data by working type and working hours per week, the non-shift work group maintained this relationship (OR: 1.13, 95% CI: 1.04–1.24) and OR was higher in the group that works more than 60 hours per week with FTND score as a continuous variable (OR: 1.24, 95% CI: 1.07–1.44).

Conclusions

The study shows nicotine dependency might affect occupational injury. From a short-term perspective, addressing worker's nicotine dependence by giving an adequate break time or smoking area might reduce work-related injuries.

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Changes in the Health Indicators of Hospital Medical Residents During the Four-Year Training Period in Korea
Ji-Sung Ahn, Seunghyeon Cho, Won-Ju Park
Journal of Korean Medical Science.2022;[Epub] CrossRef
Impacts of presenteeism on work-related injury absence and disease absence
Youna Won, Hwan-Cheol Kim, Jiho Kim, Minsun Kim, Seong-Cheol Yang, Shin-Goo Park, Jong-Han Leem
Annals of Occupational and Environmental Medicine.2022;[Epub] CrossRef

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Research Article

The association between non-regular work patterns and insomnia among Korean wage workers: the fifth Korean working condition survey: Ho-Yeon Kim, Juho Choi, Hyun-Mook Lim, Chamjin Park, Yun-Chul Hong; Ann Occup Environ Med 2021;33:e9. Published online March 29, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e9

Abstract PDF

Background

Non-regular workers are steadily increasing on account of improving corporate productivity. They are classified as non-permanent, part-time, or non-typical workers. Non-regular work has a negative impact on workers' physical and mental health. This study analyzed the relationship between non-permanent, part-time and non-typical work and insomnia among Korean wage workers, and investigated the differences and interactions between different work patterns.

Methods

The Fifth Korean Working Conditions Survey was used in this study. Non-regular work patterns were classified into 7 types: type 1, sole non-permanent; type 2, sole part-time; type 3, sole non-typical; type 4, part-time-non-typical; type 5, non-permanent-non-typical; type 6, non-permanent-part-time; type 7, all inclusive. Insomnia was measured on a scale from “normal sleep” to “insomnia” based on the 3-item Minimal Insomnia Symptom Scale. Multiple logistic regression was used to analyze the association between non-regular work patterns and insomnia among wage workers.

Results

After multivariate adjustment, a significantly increased odds ratio (OR) for insomnia was found in types 1, 2, 3, 4, 5, 6, and 7 of non-regular work patterns compared to regular work patterns. After stratification for shift and night work, the OR of the group with shift and night work was higher than that of the group without shift and night work.

Conclusions

Insomnia was significantly associated with non-regular work patterns. This association was prominent in workers with shifts and night work. This finding suggests that proper work patterns may be needed to reduce the risk of insomnia among Korean wage workers and workers who initially had insomnia should consider these results before placement.

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Association of precarious employment with depressive symptoms and insomnia: Findings from the Korean Working Conditions Survey
Seong-Uk Baek, Jin-Ha Yoon
Journal of Psychiatric Research.2025; 181: 7. CrossRef
Association between depressive symptoms and employment type of Korean workers: the Fifth Korean Working Conditions Survey
Yun-Jung Yang, Jihye Lee
BMC Public Health.2024;[Epub] CrossRef
Association between single-person household wage workers in South Korea and insomnia symptoms: the 6th Korean Working Conditions Survey (KWCS)
Yoon Ho Lee, Yong-Jin Lee, Eun-Chul Jang, Young-Sun Min, Soon-Chan Kwon
Ann Occup Environ Med.2024; 36: e25. CrossRef
Telecommuting-related health outcomes during the COVID-19 pandemic in South Korea: a national population-based cross-sectional study
Seung-Woo Ryoo, Jin-Young Min, Dong-Wook Lee, Baek-Yong Choi, Juho Choi, Ho-Yeon Kim, Kyoung-Bok Min
BMC Public Health.2023;[Epub] CrossRef
Association between Workers’ Anxiety over Technological Automation and Sleep Disturbance: Results from a Nationally Representative Survey
Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
International Journal of Environmental Research and Public Health.2022; 19(16): 10051. CrossRef
Health-Related Productivity Loss According to Health Conditions among Workers in South Korea
Dong-Wook Lee, Jongin Lee, Hyoung-Ryoul Kim, Mo-Yeol Kang
International Journal of Environmental Research and Public Health.2021; 18(14): 7589. CrossRef

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Research Article

Relationship between job rotation and work-related low back pain: a cross-sectional study using data from the fifth Korean working conditions survey: Ji-Su Shin, Kwanghyun Seo, Hyun-Jeong Oh, MyeongSeob Lim, Hee-Tae Kang, Kyeong-Sook Jeong, Sang-Baek Koh, Sung-Kyung Kim, Sung-Soo Oh; Ann Occup Environ Med 2021;33:e3. Published online January 28, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e3

Abstract PDF

Background

Job rotation was introduced in various industries as a strategic form of work for improving workers' job skills and health management. This study aims to examine the relationship between job rotation and work-related low back pain (LBP), one of the typical work-related musculoskeletal symptoms of Korean workers.

Methods

We conducted this study using the data of the 5th Korean Working Conditions Survey (KWCS). As the subject of this study, 27,163 wage workers were selected, and classified into three groups according to occupational type (white-collar, service and sales, and blue-collar). In this study, job rotation means to change the work-related activities with other colleagues periodically and work-related LBP was defined as whether there was work-related LBP in the last 12 months. Chi-square test and logistic regression were used to analyze the relationship between job rotation and work-related LBP.

Results

Out of 27,163 workers, 2,421 (8.9%) answered that they had job rotation and 2,281 (8.4%) answered that they experienced work-related LBP. According to the results from logistic regression, job rotation was significantly associated with low prevalence of work-related LBP among blue-collar workers (odds ratio [OR]: 0.71, 95% confidence interval [CI]: 0.58–0.88), whereas no significant relationship was observed among white-collar, service and sales groups. In addition, the negative association between job rotation and work-related LBP among blue-collar workers was more pronounced when exposed to ergonomic risk factors (uncomfortable posture OR: 0.79, 95% CI: 0.64–0.98; heavy work OR: 0.74, 95% CI: 0.57–0.96; repetitive work OR: 0.74, 95% CI: 0.60–0.92).

Conclusions

Job rotation was associated with low prevalence of work-related LBP among workers in the blue-collar occupational group in Korea. It is necessary to evaluate the effect of job rotation by occupational type and introduce an appropriate method of job rotation to reduce workers' work-related musculoskeletal symptoms.

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Kyungran Jung, Jae-Suk Yang
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Research Article

Combined effect of emotional labor and job insecurity on sleep disturbance among customer service workers: Sunguk Choi, Kwon Ko, Jae Bum Park, Kyung-Jong Lee, Seungho Lee, Inchul Jeong; Ann Occup Environ Med 2020;32:e33. Published online September 10, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e33

Abstract PDF

Background

Job insecurity and emotional labor are poor job-related factors that are known to cause sleep disturbances in customer service workers. This study investigates the combined effect of emotional labor and job insecurity on sleep disturbance.

Methods

This study used data from the Fifth Korean Working Condition Survey and included 15,147 paid workers who serve customers below 65 years. We re-classified into 6 groups based on whether the degree of emotional labor increased (Rarely/Sometimes/Always) or whether job insecurity (No/Yes) was present. We performed propensity score matching for several covariates and calculated odds ratio (OR) and 95% confidence intervals (CIs) for sleep disturbance by logistic regression models using only matched subjects.

Results

Workers exposed to emotional labor and job insecurity had significantly higher risk for 3 dimensions of sleep disturbance (difficulty falling asleep, waking up repeatedly during the sleep, and waking up with feeling of fatigue) (OR [95% CI]: 1.44 [1.22–1.69], 1.18 [0.99–1.40], 1.52 [1.30–1.79] for emotional labor; and 2.00 [1.75–2.29], 2.20 [1.91–2.53], 1.67 [1.45–1.92] for job insecurity). Compared to those who were exposed to both emotional labor rarely and without job insecurity, when workers had both poor job factors, the OR (95% CI) for sleep disturbance for difficulty falling asleep, waking up repeatedly during the sleep, and waking up with feeling of fatigue were 3.05 (2.42–3.86), 2.89 (2.26–3.69), and 2.60 (2.06–3.29), respectively. The relative excess risk due to Interaction of job insecurity and emotional labor was significant only for difficulty falling asleep, but not the other 2 sleep disturbance dimensions.

Conclusions

Customer service workers suffered from severe sleep disturbances according to the existing degree of emotional labor and job insecurity. The combined effect of both could have an additive influence on serious sleep disturbance among customer service workers.

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Maike E. Debus, Tahira M. Probst, Andrea Bazzoli, Hyun Jung Lee
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Zheng Ren, Chao Zhou, Xiumin Zhang, Aoqi Yang, Wenjun Li, Hongjian Liu
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Ji Sun Ha, Jin Ah Kim
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Research Article

Association between sleep duration and impaired fasting glucose according to work type in non-regular workers: data from the first and second year (2016, 2017) of the 7th Korean National Health and Nutrition Examination (KNHANE) (a cross-sectional study): JaeHan Joo, Jae-Gwang Lee, SangWoo Kim, JaeHan Lee, June-Hee Lee, Kyung-Jae Lee; Ann Occup Environ Med 2020;32:e29. Published online July 30, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e29

Abstract PDF

Background

We aimed to find the relationship between sleep duration and impaired fasting glucose according to working type in non-regular workers using the 2016 and 2017 Korean National Health And Nutrition Examination (KNHANE, 7th revision).

Method

In the 1st and 2nd year (2016, 2017) of the 7th KNHANE, 16,277 people participated. Minors were excluded because this study was intended for individuals aged 19 years and older. As this study was based on wage workers, unemployment, self-employed workers, employers, unpaid family workers, and those who have insufficient answers such as unknown or no response were excluded. Regular workers were excluded because this study was intended for non-regular workers. Finally, a total of 2,168 people were included in the survey, except those who had been diagnosed with diabetes, had a fasting blood glucose level of 126 mg/dL or higher, or taking hypoglycemic agents or receiving insulin injections. To find the relationship between sleep duration and impaired fasting glucose according to work type in non-regular workers, multiple logistic regression analysis was performed by adjusting the general and occupational characteristics after stratification according to work type. All statistical analyses were performed using the SPSS software (version 26.0; SPSS Inc., Chicago, IL, USA).

Results

In the case of insufficient sleep duration in irregular female workers, the odds ratio (OR) of impaired fasting glucose was statistically insignificant, but in the case of insufficient sleep duration in irregular male workers who have shift work, the odds ratio (OR) of impaired fasting glucose was significantly higher than that of sufficient sleep duration (Model 1, OR: 3.05, 95% confidence interval [CI]: 1.18–7.90; Model 2, OR: 2.81, 95% CI: 1.08–7.29).

Conclusions

Our findings demonstrate that insufficient sleep duration was associated with an increase in fasting blood glucose levels in non-regular male workers working shifts. This means that non-regular workers are in desperate need for adequate sleep and health care. We hope that our study will help improve the health of non-regular workers and more systematic and prospective follow-up studies will be conducted to further improve the health of non-regular workers.

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Research Article

Validation of the Work Engagement Scale-3, used in the 5th Korean Working Conditions Survey: Maro Choi, Chunhui Suh, Seong Pil Choi, Chae Kwan Lee, Byung Chul Son; Ann Occup Environ Med 2020;32:e27. Published online July 16, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e27

Abstract PDF

Background

The purpose of this study was to assess the reliability and validity of the 3-item version of the Work Engagement Scale (WES-3), which is based on the Job Demands-Resources (JD-R) model and was used in the 5^th Korean Working Conditions Survey (KWCS).

Methods

This study used data from the 5th KWCS (n = 50,205), which was conducted in 2017 with a sample of the Korean working population. The survey gathered comprehensive information on working conditions to define workforce changes and the quality of work and life. The reliability and internal consistency of the WES-3 were assessed using the corrected item-total correlation and Cronbach's alpha coefficient. Confirmatory factor analysis (CFA) was used to test the construct validity of work engagement. The convergent validity was assessed using the correlation with the WHO-5 well-being index. Correlations between work engagement and JD-R factors were also calculated.

Results

The Cronbach's alpha for work engagement was 0.776, indicating acceptable internal consistency. The model comprising 3 work engagement and 2 burnout items showed an excellent fit (χ²: 382.05, Tucker-Lewis index: 0.984, comparative fit index: 0.994, root mean square error of approximation: 0.043). The convergent validity was significant (correlation coefficient: 0.42). Correlations with burnout and job demands were negligible, whereas correlations with job resources and job satisfaction were weakly positive.

Conclusions

The results of our study confirm that the WES-3 has acceptable reliability and validity.

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Sojin Yoon, Na Yeon Lee, Yerim Lim, Sehee Hong
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Jae Rim Jeon, Seong-Sik Cho, Hyoung-Ryoul Kim, Sangjun Choi, Hye-Eun Lee, Mo-Yeol Kang
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Fatih Bilici
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Paula Maria Rattis Teixeira, Fernando Cesar Almada Santos
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Genevieve Southgate, John K. Aderibigbe, Tolulope V. Balogun, Bright Mahembe
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Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
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Validation of the ultra‐short scale for measuring work engagement among social workers in Chinese contexts
Xuebing Su, Victor Wong, Charlie Yip
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Nataliya Nerobkova, Yu Shin Park, Eun-Cheol Park, Suk-Yong Jang
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How Does the Involuntary Choice of Self-Employment Affect Subjective Well-Being in Small-Sized Business Workers? A Cross-Sectional Study from the Fifth Korean Working Conditions Survey
SangJin Park, Chulyong Park, Joo Hyun Sung
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Structural Equation Model of Work Situation and Work–Family Conflict on Depression and Work Engagement in Commercial Motor Vehicle (CMV) Drivers
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Research Article

Association between change in working time arrangements and sleep disturbance: Ryun Ha, Jae Bum Park, Kyung-Jong Lee, Sunguk Choi, Inchul Jeong; Ann Occup Environ Med 2020;32:e18. Published online June 18, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e18

Abstract PDF Supplementary Material

Background

Change in working time arrangement (WTA) can be harmful to workers' sleep and health. This study aimed to investigate the association between change in working time arrangement and sleep disturbance.

Methods

This study used data from the Fifth Korean Working Condition Survey and included 33,203 paid workers. We performed a stratified analysis by sex. After dividing the participants into 6 groups based on whether or not they experienced WTA changes, and their weekly working hours (≤40, 41–52, ≥53 hours), we calculated odds ratio (OR) using the weekly working hours ≤40 hours and with no WTA change as the reference group.

Results

Of the 33,203 paid workers, participants who experienced change in working time arrangement had higher prevalence of all three types of sleep disturbance symptoms (difficulty in falling asleep, waking up repeatedly during sleep, and waking up with a feeling of exhaustion and fatigue) in both sexes. Compared to the reference group at 95% confidence interval (CI), the group with change in WTA showed elevated OR values of 1.91 (95% CI: 1.73–2.11), 1.93 (95% CI: 1.74–2.14), 2.47 (95% CI: 2.26–2.71) for male workers; and 1.93 (95% CI: 1.73–2.16), 2.02 (95% CI: 1.80–2.27), 2.24 (95% CI: 2.01–2.50) for female workers, for difficulty in falling asleep, waking up repeatedly during the sleep, waking up with a feeling of exhaustion, and fatigue, respectively.

Conclusions

Workers who experience change in work time arrangement show a high risk of sleep disturbance in both sexes.

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Diversity of flexible working time arrangements and workers' health: An analysis of a workers’ panel and linked employer-employee data for France
Christine Erhel, Mathilde Guergoat-Larivière, Malo Mofakhami
Social Science & Medicine.2024; 356: 117129. CrossRef

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Research Article

Longitudinal associations between occupational stress and depressive symptoms: Hyung Doo Kim, Shin-Goo Park, Youna Won, Hyeonwoo Ju, Sung Wook Jang, Go Choi, Hyun-Suk Jang, Hwan-Cheol Kim, Jong-Han Leem; Ann Occup Environ Med 2020;32:e13. Published online May 7, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e13

Abstract PDF

Background

Most of the studies that have examined the association between the sub-factors of occupational stress and depressive symptoms have used cross-sectional data. However, our study has longitudinally measured the occupational stress and depressive symptoms of Korean workers of a semiconductor manufacturing company across six years to intending to investigate the associations between the sub-factors of occupational stress and depressive symptoms using longitudinal data.

Methods

Data collected from the workers of a semiconductor manufacturing company. Out of 1,013 recruited workers, 405 (40.0%) completed the survey questionnaires at 3 and 6-year follow-ups. Occupational stress was measured using a shorter version of the Korean Occupational Stress Scale (KOSS), whereas depressive symptoms were assessed using the Korean version of the Center for Epidemiological Studies-Depressive Symptoms Scale (CES-D). The data of male and female participants independently analyzed. Longitudinal associations were analyzed using panel data analysis with fixed effects.

Results

In panel data analysis with fixed effects, job insecurity (B = 0.048, p-value = 0.004) was associated with depressive symptoms among male workers. In female workers, inadequate social support (B = 0.080, p-value < 0.001), job insecurity (B = 0.039, p-value = 0.004), lack of reward (B = 0.059, p-value = 0.004) and discomfort in occupational climate (B = 0.074, p-value < 0.001) were associated with depressive symptoms among female workers.

Conclusions

Temporal changes in the sub-factors of occupational stress were associated with changes in depressive symptoms within the same period. There was a gender difference in occupational stress sub-factors related to depressive symptoms.

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Huimian Bian, He Jiang
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Xiaoyi Li, Huiqing Chen, Xiqing Liao, Manqi Huang, Xiaoman Liu, Yao Guo, Jiabin Chen, Shuang Li
WORK: A Journal of Prevention, Assessment & Rehabilitation.2025; 82(4): 1008. CrossRef
Exploring Subjective Well-Being in Human-Machine Interaction: Protocol for a Mixed Methods, Cross-Sectional Analysis in Manufacturing 5.0
Giulia Bassi, Valeria Orso, Silvia Salcuni, Luciano Gamberini
JMIR Research Protocols.2025; 14: e73896. CrossRef
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Naomichi Tani, Yoshihiro Takao, Sakihito Noro, Kazuki Sakai, Hisashi Eguchi, Takeshi Ebara
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Xiaoli Chen, Hao Zhang, Luying Zhong, Dongmei Diao, Ling Zhu, Lei Ye, Haibo Xu
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P. Padma Sri Lekha, E.P. Abdul Azeez, Arti Singh, C. V. Irshad
International Archives of Occupational and Environmental Health.2024; 97(8): 833. CrossRef
Job stress and chronic low back pain: incidence, number of episodes, and severity in a 4-year follow-up of the ELSA-Brasil Musculoskeletal cohort
Fernanda Corsino Lima Hubner, Rosa Weiss Telles, Luana Giatti, Luciana A. C. Machado, Rosane Harter Griep, Maria Carmen Viana, Sandhi Maria Barreto, Lidyane V. Camelo
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Syed Iqbal, Jennifer Howse, Sophia Banu, Aamir Lateef, Samiyah Khan, Zeshan Barlas, Sana Moon, Nidal Moukaddam, Asim A. Shah
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Peejay D. Bengwasan, Allan B. I. Bernardo, Sally I. Maximo
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Sohrab Amiri, Seyed Morteza Hosseini
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Research Article

Relationship between seafood consumption and bisphenol A exposure: the Second Korean National Environmental Health Survey (KoNEHS 2012–2014): Yeji Kim, Minkyu Park, Do Jin Nam, Eun Hye Yang, Jae-Hong Ryoo; Ann Occup Environ Med 2020;32:e10. Published online March 5, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e10

Abstract PDF

Background

This study aimed to identify the relationship between exposure to bisphenol A (BPA) and seafood consumption using a nationally representative data of the general Korean population.

Methods

This study was conducted on 5,402 adults aged 19 years and older (2,488 men, 2,914 women) based on the second Korean National Environmental Health Survey (2012–2014). We stratified the data according to gender and analyzed urinary BPA concentrations in terms of sociodemographic characteristics, health behavior, dietary factor, and seafood consumption. In the high and low BPA exposure groups, the odds ratios (ORs) were calculated using logistic regression analysis according to the top 75th percentile concentration.

Results

In men, large fish and tuna and other seafood categories had significantly higher ORs before and after adjustment in the group who consumed seafood more than once a week than in the group who rarely consumed seafood, with an adjusted value of 1.97 (95% confidence interval [CI]: 1.12–3.48) and 1.74 (95% CI: 1.10–2.75), respectively. In the shellfish category, the unadjusted OR was 1.61 (95% CI: 1.00–2.59), which was significantly higher in the group who consumed seafood more than once a week than in the group who rarely consumed seafood. However, the OR after adjusting for the variables was not statistically significant. In women, the frequency of seafood consumption and the concentration of urinary BPA were not significantly associated.

Conclusions

BPA concentration was higher in men who frequently consumed large fish and tuna, shellfish and other seafood in this study.

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Bisphenol A Biomonitoring after Sealant Placement: A Prospective Cohort Study in Schoolchildren
V. Supornsilchai, L. Sutthirat, I. Kaewkamnerdpong, C. Jantarat, N. Sakorn, W. Nosoongnoen, T. Chaiboonyarak, L. Samaranayake, S. Wacharasindhu, T. Porntaveetus
JDR Clinical & Translational Research.2026; 11(1): 53. CrossRef
Occurrence and profiles of bisphenol A and its analogues in marine shrimps from Tianjin and their implications for human exposure
Siyu Yang, Weiyi Jin, Chunhai Gao, Yeqing Jia, Xinghua Li, Jianping Li, Yi Zhang
Journal of Food Composition and Analysis.2025; 137: 106852. CrossRef
Relationship between the use of hair products and urine benzophenone-3: the Korean National Environmental Health Survey (KoNEHS) cycle 4
Siyoung Kim, Seong-yong Cho, Seongyong Yoon, Daehwan Kim, Hyun Woo Park, Jisoo Kang, Sung Woo Huh
Annals of Occupational and Environmental Medicine.2024;[Epub] CrossRef
Relationship between shellfish consumption and urinary phthalate metabolites: Korean National Environmental Health Survey (KoNEHS) cycle 3 (2015-2017)
Jisoo Kang, Seong-yong Cho, Jinseok Kim, Seongyong Yoon, Jong-min An, Gayoung Kim, Si young Kim
Annals of Occupational and Environmental Medicine.2023;[Epub] CrossRef
Endocrine disrupting chemicals: A promoter of non-alcoholic fatty liver disease
Yajie Chen, Yang Wang, Ziqiang Cui, Wenpeng Liu, Baowang Liu, Qiang Zeng, Xin Zhao, Jian Dou, Jinglin Cao
Frontiers in Public Health.2023;[Epub] CrossRef
Relationship between the use of plastics in refrigerator food storage and urine phthalate metabolites: the Korean National Environmental Health Survey (KoNEHS) cycle 3
Jisoo Kang, Seong-yong Cho, Seongyong Yoon
Annals of Occupational and Environmental Medicine.2023;[Epub] CrossRef
Bisphenol S Impairs Oestradiol Secretion during In Vitro Basal Folliculogenesis in a Mono-Ovulatory Species Model
Claire Vignault, Véronique Cadoret, Peggy Jarrier-Gaillard, Pascal Papillier, Ophélie Téteau, Alice Desmarchais, Svetlana Uzbekova, Aurélien Binet, Fabrice Guérif, Sebastien Elis, Virginie Maillard
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Jun Young Uhm, Hyoung-Ryoul Kim
International Journal of Environmental Research and Public Health.2022; 19(3): 1103. CrossRef

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Research Article

The exposure level of environmental harmful substances related to the secondhand smoke in Korean non-smoker adults: data from the second Korean National Environmental Health Survey (KoNEHS 2012–2014): a cross-sectional study: Sang Woo Kim, Sung Won Jung, Jae-Gwang Lee, Jae Han Joo, June-Hee Lee, Kyung-Jae Lee; Ann Occup Environ Med 2019;31:e30. Published online October 15, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e30

Abstract PDF

Background

We aimed to find the exposure level of environmental harmful substances related to the secondhand smoke (SHS) using a nationally representative data of the general population in Korea.

Methods

Total 3,533 people were included in this study. We compared the proportion exceeding 95 percentile of the concentrations of harmful substances by sex according to SHS exposure. 16 kinds of substances related to tobacco smoke were analyzed including heavy metals, polycyclic aromatic hydrocarbons, volatile organic compounds, and environmental phenol. For 16 kinds of substances, the odds ratios (ORs) for exceeding 95 percentile of each harmful substance were calculated by multiple logistic regression according to SHS exposure. Age, education level, marital status, body mass index, drinking, and exercise were adjusted as covariates. Cotinine level was additionally adjusted to increase reliability of our results.

Results

SHS was associated with high exposure of mercury, methylhippuric acid, fluorene, and cotinine. In women, SHS was associated with mercury, methylhippuric acid, fluorene, and cotinine, while in men, it was associated with cotinine. After adjusting covariates, ORs of blood mercury, methylhippuric acid and hydroxyfluorene in the exposed gruop were greater than that in the non-exposed group. Especially in female, methylhippuric acid and hydroxyfluorene showed consistent result.

Conclusions

Our finding demonstrates that SHS is related to several harmful substances. Therefore, to reduce the health effects of SHS, it is necessary to educate and publicize the risk of SHS. Future studies are necessary to more accurately analyze factors such as exposure frequency, time, and pathway of SHS.

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Exposure to Environmental Chemicals from Environmental Tobacco Smoking in Korean Adolescents
Jung-Eum Lee, Ah-Reum Jo, Sunho Lee, Wanhyung Lee
Toxics.2025; 13(7): 546. CrossRef
Sleep duration mediates the association between heavy metals and the prevalence of depression: an integrated approach from the NHANES (2005–2020)
Qingsong Mao, Xiaoyi Zhu, Yuzhe Kong
Frontiers in Psychiatry.2024;[Epub] CrossRef
Joint association of heavy metals and polycyclic aromatic hydrocarbons exposure with depression in adults
Miaomiao Jiang, Hui Zhao
Environmental Research.2024; 242: 117807. CrossRef
The Exposure Status of Environmental Chemicals in South Korea: The Korean National Environmental Health Survey 2018–2020
Sooyeon Hong, Ok-Jin Kim, Sun Kyoung Jung, Hye Li Jeon, Suejin Kim, Jihyon Kil
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Environmental tobacco smoke exposure is associated with increased levels of metals in children’s saliva
Lisa M. Gatzke-Kopp, Jenna L. Riis, Hedyeh Ahmadi, Hillary L. Piccerillo, Douglas A. Granger, Clancy B. Blair, Elizabeth A. Thomas
Journal of Exposure Science & Environmental Epidemiology.2023; 33(6): 903. CrossRef
Passive smoking exposure and the risk of hypertension among non-smoking adults: the 2015–2016 NHANES data
Onoja Matthew Akpa, Akinkunmi Paul Okekunle, Jeffery Osahon Asowata, Babatunde Adedokun
Clinical Hypertension.2021;[Epub] CrossRef

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Research Article

Emotional labor and job types of male firefighters in Daegu Metropolitan City: Sung Kyu Park, Han Cheol Heo, Joon Sakong, Man Joong Jeon; Ann Occup Environ Med 2019;31:e25. Published online September 26, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e25

Abstract PDF

Background

Research on the emotional labor of firefighters is actively being carried out, but studies that analyze emotional labor separately by job types, working departments, and other conditions of firefighters are insufficient. The purpose of this study is to investigate the difference in emotional labor level between departments and other conditions of firefighters.

Methods

A total of 287 Korean firefighters were included for analysis. The demands of emotional labor and emotional damage were measured using the Korean Emotional Labor Scale. To analyze the conditions and factors affecting the emotional labor level of the firefighters, logistic regression analysis was performed using the emotional labor high risk group as a dependent variable.

Results

The average score of overall emotional labor level of the firefighters was 47.2 ± 17.3, and the prevalence of high risk firefighters with emotional labor was 27.1%. It was found that the emergency medical service and administration departments showed a higher prevalence of high risk emotional labor firefighters than did other departments. The result of multiple logistic regression analysis for the high risk emotional labor firefighters showed that the adjusted odds ratio of emergency medical service department compared to the reference group (the rescue department) was 2.89 (95% confidence interval [CI]: 1.02–8.24).

Conclusions

Among the firefighters, the emergency medical service department is a high risk factor for emotional labor. Therefore, education and prevention training on emotional labor should be more thorough before work shifts.

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Global prevalence and associated factors of sleep disorders and poor sleep quality among firefighters: A systematic review and meta-analysis
Amir Hossein Khoshakhlagh, Saleh Al Sulaie, Saeid Yazdanirad, Robin Marc Orr, Hossein Dehdarirad, Alireza Milajerdi
Heliyon.2023; 9(2): e13250. CrossRef
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Xiao Chen, Xiongliang Xiao, Arpit Bhardwaj
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Research Article

Korean translation and validation of the Workplace Positive emotion, Engagement, Relationships, Meaning, and Accomplishment (PERMA)-Profiler: Seong Pil Choi, Chunhui Suh, Jae Won Yang, Byung Jin Ye, Chae Kwan Lee, Byung Chul Son, Maro Choi; Ann Occup Environ Med 2019;31:e17. Published online August 13, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e17; Correction in: Ann Occup Environ Med 2024;36(0):e26

Abstract PDF

Background

No tool is available for the multidimensional measurement of workplace well-being among Korean workers. In this study, the Workplace Positive emotion, Engagement, Relationships, Meaning, and Accomplishment (PERMA)-Profiler, a multidimensional workplace well-being measure, was translated into Korean, and its validity and reliability were assessed.

Methods

The Workplace PERMA-Profiler, including the positive emotion, engagement, relationships, meaning, and accomplishment domains, was translated according to international guidelines. The questionnaires included the Workplace PERMA-Profiler, Mental Health Continuum-Short Form, Utrecht Work Engagement Scale, Maslach Burnout Inventory-General Survey, Psychosocial Well-being Index-Short Form, and Korean Occupational Stress Scale-Short Form. A total of 316 Korean workers completed a web-based survey with adequate response. Cronbach's alpha values were calculated to assess scale reliability, and correlational and confirmatory factor analyses were used to assess validity.

Results

Cronbach's alpha values for the Korean Workplace PERMA-Profiler ranged from 0.70 to 0.95. Confirmatory factor analysis indicated that the 5-factor model had a marginally acceptable fit [χ²(80) = 383.04, comparative fit index = 0.909, Tucker-Lewis index = 0.881, root mean square error of approximation = 0.110, and standardized root mean square residual = 0.054]. The 5-factor PERMA domains were correlated positively with work engagement and mental well-being in life, and negatively with burnout, occupational stressors, and stress responses. These results showed that the Workplace PERMA-Profiler has good convergent and divergent validity.

Conclusions

The Korean version of the Workplace PERMA-Profiler had good reliability and validity. It might be used as an indicator or evaluation tool for positive mental health interventions in the workplace.

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Aynur Karabacak Çelik
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Freddy S. Kau, Aden-Paul Flotman
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Sadaf Basharat, Dieuwer ten Braak, Ingunn Størksen
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Adam Zeid
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Research Article

The association between dependent self-employment and self-reported depression/anxiety and sleep disorder in South Korea: Guyeon Won, Jae Bum Park, Kyung-Jong Lee, Ryun Ha, Seungho Lee, Inchul Jeong; Ann Occup Environ Med 2019;31:e13. Published online July 29, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e13

Abstract PDF

Background

Dependent self-employment is precarious employment, which can be vulnerable to mental health problems. This study aimed to investigate the association of dependent self-employment with depression, anxiety, and sleep disorder in South Korea.

Methods

This study used data from the Fourth Korean Working Conditions Survey and included 32,691 paid workers. Dependent self-employment and self-reported depression/anxiety, and sleep disorder were investigated using a questionnaire. Logistic regression analysis was performed to investigate the association between dependent self-employment and mental health problems.

Results

Of the 32,691 paid workers, 2,371 (7.3%) were dependent self-employed workers. The odds ratio (OR) of dependent self-employment for self-reported depression/anxiety was 1.78 (95% confidence interval [CI]: 1.29–2.45) and the OR of dependent self-employment for self-reported sleep disorder was 1.26 (95% CI: 1.01–1.59) compared to other paid workers.

Conclusions

Dependent self-employment is related to an increased risk of self-reported depression/anxiety and sleep disorder in South Korea.

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Research Article

The association between long working hours and marital status change: middle-aged and educated Korean in 2014–2015: Hyunil Kim, Byung-Seong Suh, Won-Cheol Lee, Han-Seur Jeong, Kyung-Hun Son, Min-Woo Nam, Hyeong-Cheol Kim; Ann Occup Environ Med 2019;31:e3. Published online May 1, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e3

Abstract PDF

Background

We investigated the association between long workhours and marital status change from married to divorced or separated status that might have bad health effects.

Methods

A total of 40,654 participants with married status in 2014 were followed up in 2015. Weekly workhours were categorized into four groups: ≤ 40, 41–52, 53–60, and > 60 hours per week. Univariate and multivariate logistic regression analyses were performed to determine the relationship between groups of workhours and marital status change after adjusting for age, total monthly household income, working type, and depression with sex stratification.

Results

The study populations consisted of 8,346 (20.5%) females and 32,308 (79.5%) males. Odd ratios (ORs) of marital status change for females working for more than 60 hours per week was 4.26 (95% confidence interval [CI]: 1.25–14.5), when working less than or equal to 40 hours per week was used as reference in the crude model. ORs of working more than 60 hours per week was 4.57 (95% CI: 1.02–20.5) in female workers when considering age, total household earning per month, working type of daytime, and depression in a dose-response manner. However, for male workers, long workhours were not significantly related to change of marriage status.

Conclusions

Long workhours for more than 60 hours per week had significantly higher risk of divorce or separation in females, but not in males. Further follow-up studies are needed to evaluate long term effects of long workhours on divorce risk.

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Research Article

Relationship between personal care products usage and triclosan exposure: the second Korean National Environmental Health Survey (KoNEHS 2012–2014): Minkyu Park, Seyoung Kim, Yeji Kim, Do Jin Nam, Jae-Hong Ryoo, Sinye Lim; Ann Occup Environ Med 2019;31:2. Published online January 28, 2019; DOI: https://doi.org/10.1186/s40557-019-0283-y

Abstract PDF Supplementary Material

Background

We aimed to find the exposure level of triclosan (TCS), a known endocrine disruptor, related to the use of personal care products using a nationally representative data of the general population in Korea.

Methods

This study included data of 6288 adults aged 19 years and older (2692 men, 3596 women), based on the Second Korean National Environmental Health Survey (KoNEHS 2012–2014). The data were divided according to gender. The frequency and proportion of each variable were determined by dividing participants into two groups based on the top 75th percentile concentration of urinary TCS (male: 1.096 μg/g creatinine, female: 1.329 μg/g creatinine). Odds ratios (ORs) were calculated using logistic regression analysis for the high TCS exposure and low TCS exposure groups.

Results

Overall, the proportion of participants using personal care products was higher in women than in men. There was a significantly higher proportion of participants in the high TCS exposure group with younger age, higher education and income levels and with more frequent use of fragrance products, hair care products, body cleansers, cosmetics, and antimicrobial agents. In both men and women, ORs tended to increase with increased frequency of use of hair care products, body cleansers, and cosmetics before and after adjustment.

Conclusions

Our findings demonstrate that as the frequency of use of personal care products increases, urine TCS concentration increases. Because TCS is a well-known endocrine disruptor, further studies are needed and explore other health effects with exposure to TCS in general population in Korea.

Electronic supplementary material

The online version of this article (10.1186/s40557-019-0283-y) contains supplementary material, which is available to authorized users.

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Research Article

The association between long working hours and work-related musculoskeletal symptoms of Korean wage workers: data from the fourth Korean working conditions survey (a cross-sectional study): Jae-Gwang Lee, Guang Hwi Kim, Sung Won Jung, Sang Woo Kim, June-Hee Lee, Kyung-Jae Lee; Ann Occup Environ Med 2018;30:67. Published online December 3, 2018; DOI: https://doi.org/10.1186/s40557-018-0278-0

Abstract PDF

Background

It has been reported that long working hours are hazardous to the workers’ health. Especially, work-related musculoskeletal disorders (WMSDs) have been considered as one of the significant health issues in workplace. The objective of this study was to identify the association between long working hours and work-related musculoskeletal symptoms.

Methods

The analysis was conducted using data from the Fourth Korean Working Conditions Survey (KWCS). Subjects of this study were 24,783 wage workers and divided into three groups according to the weekly working hours, which were ≤ 40, 41–52 and > 52 h. The relationship between long working hours and work-related musculoskeletal symptoms was analyzed by multivariate logistic regression method after adjusting for general, occupational characteristics including specific working motions or postures and psychosocial factors.

Results

Approximately 18.4% of subjects worked more than 52 h per week and 26.4 and 16.4% of male subjects and 33.0 and 23.4% of female subjects experienced work-related upper and lower limb pains, respectively, over the last 12 months. Moreover, the prevalence of upper and lower limb pain was increased in both genders as the weekly working hours increased. The odds ratios (ORs) of upper limb pain for those working 41–52 h and more than 52 h per week when adjusted for general, occupational characteristics including specific motions or postures and psychosocial factors were 1.36 and 1.40 for male workers and 1.26 and 1.66 for female workers compared to the reference group, respectively. Furthermore, ORs of lower limb pain for the same weekly working hour groups were 1.26 and 1.47 for male workers and 1.20 and 1.47 for female workers, respectively.

Conclusions

Long working hours were significantly related to work-related musculoskeletal symptoms in Korean wage workers and appropriate interventions should be implemented to reduce long working hours that can negatively affect workers’ health.

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Research Article

Relationship between simultaneous exposure to ergonomic risk factors and work-related lower back pain: a cross-sectional study based on the fourth Korean working conditions survey: Jae-Yeop Kim, Ji-Su Shin, Myeong-Seob Lim, Hyeon-Gyeong Choi, Sung-Kyeong Kim, Hee-Tae Kang, Sang-Baek Koh, Sung-Soo Oh; Ann Occup Environ Med 2018;30:58. Published online September 5, 2018; DOI: https://doi.org/10.1186/s40557-018-0269-1

Abstract PDF

Background

It is well known that ergonomic risk factors and back pain are related. However, few studies have examined the relationship between simultaneous exposure to these risk factors and back pain in a Korean population. We aimed to investigate the relationship between simultaneous exposure to ergonomic risk factors and work-related lower back pain (LBP) based on the fourth Korean Working Conditions Survey (KWCS).

Method

The fourth KWCS (2014) was used for this study. Chi-square tests and logistic regression were used to assess relationship between 5 ergonomic risk factors and work-related LBP. We also analyzed the relationship between simultaneous exposure to 2 risk factors and work-related LBP.

Results

All 5 ergonomic risk factors (fatigue-inducing and painful posture; lifting or moving people; dragging, pushing, or moving heavy objects; standing posture; and repetitive hand or arm movements) were significantly correlated with work-related LBP in the severe exposure group (adjusted odd ratios [aOR] 5.09, 95% confidence interval [CI] 4.46–5.83; aOR 1.98, 95% CI 1.62–2.42; aOR 2.09, 95% CI 1.82–2.40; aOR 1.79, 95% CI 1.60–2.01; aOR 2.04, 95% CI 1.82–2.30, respectively). When exposed to 2 risk factors simultaneously, the relationship between exposure and work-related LBP was not greater than exposure to only 1 risk factor in our study (usually exposed to ‘fatigue-inducing or painful posture’ aOR 2.17, 95% CI 2.02–2.34; high exposure to both ‘fatigue-inducing or painful posture’ and ‘dragging, pushing, or moving heavy objects’ aOR 2.00, 95% CI 1.82–2.20).

Conclusions

There was a strong relationship between severe exposure to each ergonomic risk factor and work-related LBP. However, when exposed to 2 ergonomic risk factors simultaneously, the relationship between exposure and work-related LBP was not stronger than when exposed to only 1 risk factor in our study.

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Research Article

An overview of compensated work-related injuries among Korean firefighters from 2010 to 2015: Hyung Doo Kim, Yon Soo An, Dong Hyun Kim, Kyung Sook Jeong, Yeon Soon Ahn; Ann Occup Environ Med 2018;30:57. Published online September 3, 2018; DOI: https://doi.org/10.1186/s40557-018-0268-2

Abstract PDF

Background

Although one in two firefighters in South Korea have experienced work-related injuries, there are few studies which show the overview description on work-related injuries and its analysis regarding such causes. Therefore, we aimed to show the overview of compensated work-related injuries in order to serve fundamental data for establishing prevention policies on work-related injuries for Korean firefighters.

Methods

We requested the all claimed work-related injury data of Korean firefighters from 2010 to 2015 to the Korean National Fire Agency (NFA). The data from NFA including 2457 claimed cases was analyzed and we confirmed, 2154 approved work-related injuries for the kinds of job activities, cause of accident and type of injuries. Among 2154 approved cases, we analyzed more variables for the sex, age, and job duration of 1344 compensated cases through served text file on summary of accident.

Results

The Government Employees Pension Service (GEPS) recognized 2154 (87.7%) approved work-related injuries among 2457 claimed cases. The incidence of work-related injuries per 1000 firefighters was 9.8 persons. By region, the incidence of work-related injuries per 1000 firefighters ranged from a maximum of 14.5 to a minimum of 4.0. The most common job activity caused the accident was fire suppression (18.0%), followed by Emergency medical services (EMS) (17.5%) and training (10.7%). The most common cause of these accident was movement imbalance (30.3%), followed by falls (18.9%) and traffic accident (13.4%). In these work-related injuries, sprains and bruises were the most common type of injury (27.2%), and the most commonly injured body site was the upper and lower back (25.3%). Data from identified 1344 firefighters showed that 1264 (94.0%) were male and 80 (6.0%) were female. Age group was the highest in the 40s with 623 cases (46.4%), and job duration was the highest with 650 cases in 5–10 years (48.4%).

Conclusion

In this study, we could obtain the preliminary data necessary to establish preventive measures, including the cause of accident and region with high accident rates. However, the number of applications for compensated injuries was very small compared to the frequency of injuries found in previous studies. The lack of appropriate treatment suggested that many firefighter injuries can become chronic. In this study, we suggest that it is necessary to introduce an injury monitoring system and improve the accessibility of compensated injuries.

Trial registration

CR318031. Registered 20 June 2018.

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Research Article

Performance assessment on the Korean Computerized Neurobehavioral Test using a mobile device and a conventional computer: an experimental study: Young Seok Byun, Sung Kyu Park, Joon Sakong, Man Joong Jeon; Ann Occup Environ Med 2018;30:55. Published online August 29, 2018; DOI: https://doi.org/10.1186/s40557-018-0264-6

Abstract PDF

Background

The Korean Computerized Neurobehavioral Test (KCNT) is a psychological assessment tool used as part of Workers’ Special Health Examinations in Korea. Due to the spread of mobile technology, this study aimed to compare results of the KCNT administered on a tablet PC versus a desktop computer, and, therefore, assess the clinical applicability of mobile devices.

Methods

A total of 72 participants enrolled in this study. Their age, sex, and years of formal education were collected during an interview, as well as their typing speed. The test battery comprised five subtests: Simple Reaction Time test, Choice Reaction Time test, Digit Addition test, Symbol-Digit Substitution test, and Finger Tapping Speed test. Participants repeated the KCNT test battery in a randomly assigned order using four different testing systems: a desktop computer equipped with a conventional 106-key keyboard (System 1), a desktop computer equipped with a simplified keyboard (System 2), a tablet PC with a simplified 17-key on-screen keyboard (System 3), and a tablet PC equipped with a simplified keyboard (System 4).

Results

Results of the Digit Addition test did not differ significantly for different testing systems. In contrast, results of the Simple Reaction Time test, Choice Reaction Time test, Symbol-Digit Substitution test, and Finger Tapping test were lower for the tablet PC (Systems 3 and 4) compared to the desktop computer (Systems 1 and 2). Systems 1 and 2 did not show significantly different results. Performance on System 3 was inferior to that on System 4, only for the Choice Reaction Time test and Finger Tapping Speed test. There were also significant differences in performance by computer familiarity when adjusted for age and education; however, the performance of each group on the test systems showed similar patterns.

Conclusions

It is not recommended to use a tablet PC to administer the KCNT to evaluate neurobehavioral performance for the Simple Reaction Time test and Choice Reaction Time test; however, tablet PCs with an on-screen keyboard may be used to perform the Digit Addition test, and the Symbol-Digit Substitution test and Finger Tapping Speed test to a limited degree.

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R J Elbin, Nathan R D’Amico, Matthew McCarthy, Melissa N Womble, Sydne O’Connor, Philip Schatz
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Research Article

Effects of changes in occupational stress on the depressive symptoms of Korean workers in a large company: a longitudinal survey: Jaehyuk Jung, Inchul Jeong, Kyung-Jong Lee, Guyeon Won, Jae Bum Park; Ann Occup Environ Med 2018;30:39. Published online June 8, 2018; DOI: https://doi.org/10.1186/s40557-018-0249-5

Abstract PDF

Background

Prospective studies on occupational stress and depression among Korean workers are scarce. This study aimed to investigate the causal relationship between changes in occupational stress and the presence of depression.

Methods

This study analyzed data from a survey conducted with workers in a large Korean company (2015–2016). Occupational stress was measured using the Korean Occupational Stress Scale, and depression was screened using the WHO-5 Well-being Index. The levels of occupational stress were grouped in quartiles based on subjects’ occupational stress scores in 2015, and changes in occupational stress were measured using the score changes between the 2015 and 2016 surveys. Subjects were divided into four groups according to the presence or absence of depression in 2015 and 2016: a non-depressed group whose mental health did not change, a non-depressed group whose mental health deteriorated, a depressed group that continued to be depressed, and a depressed group whose symptoms of depression were alleviated. Logistic regression analysis was used to calculate the odds ratios (ORs) and confidence intervals (CIs) of the subjects’ deterioration in mood or alleviation of depression by occupational stress levels and changes.

Results

The OR for developing depressive symptoms was 2.51 (95% CI 1.46–4.33) and 2.73 (95% CI 1.39–5.36) in the third and the fourth quartiles of occupational stress, respectively, compared to the first quartile. When the occupational stress score increased by 1 point, the OR for increasing depressive symptoms was 1.07 (95% CI 1.04–1.10). There was no significant difference in the alleviation of depressive symptoms between the groups by level of occupational stress. However, when the occupational stress score decreased by 1 point, the OR for alleviating depressive symptoms was 1.08 (95% CI 1.05–1.11).

Conclusion

The results showed that increased occupational stress increased the presence of depressive symptoms, and that reduced occupational stress suppressed the development of depressive symptoms. More attention should be paid to stress management among workers.

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Research Article

Female non-smokers’ environmental tobacco smoking exposure by public transportation mode: Seyoung Kim, Jin-Soo Park, Minkyu Park, Yeji Kim, Sinye Lim, Hye-Eun Lee; Ann Occup Environ Med 2018;30:24. Published online April 19, 2018; DOI: https://doi.org/10.1186/s40557-018-0239-7

Abstract PDF

Background

This study aimed to analyze environmental tobacco smoking exposure in female nonsmokers by public transportation mode using representative data of Koreans.

Methods

Data from the Second Korean National Environmental Health Survey (2012–2014) were analyzed. Urine cotinine was analyzed by public transport behavior, secondhand smoke exposure, socioeconomic factors, and health-related factors. Participants were 1322 adult females; those with the top 75% urine cotinine concentrations were assigned to the high exposure group. A logistic regression analysis was performed considering appropriate weights and stratification according to the sample design of the Second Korean National Environmental Health Survey.

Results

The geometric mean of urine cotinine concentrations differed according to public transportation modes: subway (1.66 μg/g creatinine) bus (1.77 μg/g creatinine), and taxi (1.94 μg/g creatinine). The odds ratio [OR] was calculated for the high exposure group. The OR of the taxi (2.39; 95% confidence interval, 1.00–5.69) was statistically significantly higher than the subway value (reference), and marginally significant after adjusted with life style, sociodemographic factors and involuntary smoking frequency (2.42, 95% confidence interval, 0.97–6.04).

Conclusions

The odds ratio of passengers who mainly used taxis was marginally significantly higher than those of passengers who used subways and buses after adjusted with life style and sociodemographic factors. Implementation of supplementary measures and further studies on exposure to environmental tobacco smoking in taxis are warranted.

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Jeonghoon Kim, Kiyoung Lee
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Research Article

The association between Korean employed workers’ on-call work and health problems, injuries: Chulin Baek, Jae Bum Park, Kyungjong Lee, Jaehyuk Jung; Ann Occup Environ Med 2018;30:19. Published online March 20, 2018; DOI: https://doi.org/10.1186/s40557-018-0225-0

Abstract PDF

Background

On-call work is a form of work that requires the person to work at any time during the on-call period. Thus, on-call work is often regarded as one of the most severe stress factors. This study investigates the associations between on-call work and health problems, injuries.

Methods

This study was based on the 3rd Korean Working Conditions Survey. Total of 29,246 employed workers who had been working for at least 1 year were included. Logistic regression analysis was performed to investigate the association between on-call work and health problems, injuries.

Results

The odds ratios for on-call workers in terms of physical health problems, psychological health problems, and injuries were 1.33 (95% confidence interval [CI] 1.22-1.44), 1.31 (95% CI 1.08-1.60), and 2.76 (95% CI 2.26-3.37), respectively. Analysis of the detailed symptoms revealed odds ratios in on-call workers of 2.06 for hearing problems (95% CI 1.63-2.62); 1.71 for skin problems (95% CI 1.38-2.12); 1.22 for back pain (95% CI 1.08-1.38); 1.23 for muscular pains in upper limbs (95% CI 1.12-1.34); 1.27 for muscular pains in lower limbs (95% CI 1.15-1.40); 1.46 for headache, eye fatigue (95% CI 1.32-1.60); 1.37 for abdominal pain (95% CI 1.02-1.85); 1.43 for depression or anxiety disorders (95% CI 1.07-1.93); 1.36 for fatigue (95% CI 1.24-1.49); and 1.41 for insomnia and general sleep difficulties (95% CI 1.13-1.76).

Conclusions

The present study found that on-call work results in an increased risk of health problems and injuries. This study is the result of analyses of broad range of the job spectrum in Korean employed workers; thus, future studies are necessary to determine the effects of on-call work in various job groups.

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Research Article

Association between exposure to ambient air pollution and renal function in Korean adults: Hyun-Jin Kim, Jin-young Min, Yong-Seok Seo, Kyoung-bok Min; Ann Occup Environ Med 2018;30:14. Published online February 28, 2018; DOI: https://doi.org/10.1186/s40557-018-0226-z

Abstract PDF

Background

Ambient air pollution has a negative effect on many diseases, such as cardiovascular and respiratory diseases. Recent studies have reported a relationship between air pollution and renal function, but the results were limited to exposure to particulate matter (PM). This study was to identify associations between various air pollutants and renal function among Korean adults.

Methods

Nationwide survey data for a total of 24,407 adults were analyzed. We calculated the estimated glomerular filtration rate (eGFR) for each individual to assess their renal function and used this to categorize those with chronic kidney disease (CKD). To evaluate exposure to ambient air pollution, we used the annual mean concentrations of four ambient air pollutants: PM with an aerodynamic diameter ≤ 10 μm (PM₁₀), nitrogen dioxide (NO₂), sulfur dioxide (SO₂), and carbon monoxide (CO).

Results

We identified significant inverse relationships between the air pollutants PM₁₀ and NO₂ and eGFR in all statistical adjustment models (all p < 0.05). In the full covariate model, interquartile range increases in the annual mean concentrations of PM₁₀ and NO₂ were associated with decreases in eGFR levels of 0.46 (95% CI = − 0.87, − 0.04) and 0.85 (95% CI = − 1.40, − 0.30), respectively. Three of the ambient air pollutants were significantly related to an increased risk of CKD in the unadjusted model (p < 0.0001), but all significant associations disappeared after adjusting for covariates (all p > 0.05).

Conclusions

Exposures to PM₁₀ and NO₂ were significantly associated with decreases in eGFR levels, but not CKD, in Korean adults.

Citations

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Research Article

Relationship between dietary factors and bisphenol a exposure: the second Korean National Environmental Health Survey (KoNEHS 2012–2014): Jin-Soo Park, Seyoung Kim, Minkyu Park, Yeji Kim, Hyeeun Lee, Hyunrim Choi, Sinye Lim; Ann Occup Environ Med 2017;29:42. Published online October 18, 2017; DOI: https://doi.org/10.1186/s40557-017-0200-1

Abstract PDF

Background

This study was aimed at finding out the exposure level of bisphenol A (BPA), a well-known endocrine disruptor, in relation to dietary factors using a data representing the Korean general population.

Methods

This study was performed on 5402 adults aged 19 years and older based on the Second Korean National Environmental Health Survey (KoNEHS 2012–2014). The data analyzed urinary BPA concentration in relation to socio-demographic variables, health behavior-related variables, and dietary factor-related variables. Odds ratio (OR) was calculated through a logistic regression analysis after dividing the participants into high BPA exposure group and low BPA exposure group based on the top 75 percentile concentration. The logistic regression analysis was carried out considering the appropriate sample weight, stratification, and clustering of the second KoNEHS sample design.

Results

The group drinking bottled water at home and the group using zip-top bags/plastic bags showed significantly higher urinary BPA concentration in female. OR tends to increase as the intake frequency of frozen food increased and OR of frozen food consumption of more than once a week was 1.48 (95% confidence interval (CI) 1.02–2.24) for male and the group drinking bottled water showed significantly higher OR of 1.45 (95% CI 1.06–2.17) after adjusting the related factors for female.

Conclusions

BPA levels were high in female using bottled water and in male consuming frozen food, and therefore bottled water and frozen food need to be avoided to reduce BPA levels.

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Research Article

Association between supervisors’ behavior and wage workers’ job stress in Korea: analysis of the fourth Korean working conditions survey: Shin Uk Kang, Byeong Jin Ye, ByoungGwon Kim, Jung Il Kim, Jung Woo Kim; Ann Occup Environ Med 2017;29:43. Published online October 11, 2017; DOI: https://doi.org/10.1186/s40557-017-0199-3

Abstract PDF

Background

In modern society, many workers are stressed. Supervisors’ support or behavior can affect the emotional or psychological part of the worker. The purpose of this study is to investigate the effect of supervisor’s behavior on worker’s stress.

Methods

The study included 19,272 subjects following the assignment of weighted values to workers other than soldiers using data from the Fourth Korean Working Condition Survey. Supervisors’ behavior was measured using 5 items: “supervisor feedback regarding work,” “respectful attitude,” “good conflict-resolution ability,” “good work-related planning and organizational ability,” and the encouragement of participation in important decision making. Job stress was measured using 1 item: “I experience stress at work.” Multiple logistic regression analysis was performed to examine the effects of supervisors’ behavioral, general, occupational, and psychosocial characteristics on job stress in workers. Organizational characteristics associated with supervisors’ behavior were also analyzed.

Results

The results showed that supervisors’ provision of feedback regarding work increased workers’ job stress (OR = 1.329, 95% CI = 1.203 ~ 1.468). When a supervisor respect workers (OR = 0.812, 95% CI = 0.722 ~ 0.913) or good at planning and organizing works (OR = 0.816, 95% CI: 0.732 ~ 0.910), workers’ job stress decreased. In particular, the two types of supervisor behaviors, other than feedback regarding work, were high in private-sector organizations employing less than 300 employees.

Conclusion

Supervisors’ behavior influenced job stress levels in workers. Therefore, it is necessary to increase education regarding the effects of supervisors’ behavior on job stress, which should initially be provided in private-sector organizations with up to 300 employees.

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Research

The association between perceived discriminations and well-being in Korean employed workers: the 4th Korean working conditions survey: Hee Sung Lee, Guang Hwi Kim, Sung Won Jung, June-Hee Lee, Kyung-Jae Lee, Joo Ja Kim; Ann Occup Environ Med 2017;29:46. Published online October 2, 2017; DOI: https://doi.org/10.1186/s40557-017-0205-9

Abstract PDF

Background

Around the globe, discrimination has emerged as a social issue requiring serious consideration. From the perspective of public health, the impact of discrimination on the health of affected individuals is a subject of great importance. On the other hand, subjective well-being is a key indicator of an individual’s physical, mental, and social health. The present study aims to analyze the relationship between Korean employed workers’ subjective health and their exposure to perceived discrimination.

Methods

The Fourth Korean Working Conditions Survey (KWCS, 2014) was conducted on a representative sample of the economically active population aged 15 years or older, who were either employees or self-employed at the time of interview. After removing inconsistent data, 32,984 employed workers were examined in this study. The data included general and occupational characteristics, perceived discrimination, and well-being. Well-being was measured through the WHO-Five index (1998 version). Multiple logistic regression analysis was used to examine the association between perceived discrimination and well-being.

Result

As a group, employed workers who were exposed to discrimination had a significantly higher likelihood of “poor well-being” than their counterparts who were not exposed to discrimination. More specifically, the workers exposed to age discrimination had an odds ratio(OR) of 1.51 (95% CI: 1.36–1.68), workers exposed to discrimination based on educational attainment had an OR of 1.43 (95% CI: 1.26–1.61), and workers exposed to discrimination based on employment type had an OR of 1.68 (95% CI: 1.48–1.91) with respect to poor well-being.

Furthermore, workers exposed to a greater number of discriminatory incidents were also at a higher risk of “poor well-being” than their counterparts who were exposed to fewer such incidents. More specifically, the workers with three exposures to discrimination had an OR of 2.60 (95% CI: 1.92–3.53), the workers with two such exposures had an OR of 1.69 (95% CI: 1.44–1.99), and the workers with one such exposure had an OR of 1.32 (95% CI: 1.20–1.45).

Conclusion

The present study found that discrimination based on age, educational attainment, or employment type put workers at a higher risk of “poor well-being,” and that the greater the exposure to discrimination, the higher the risk of poor well-being.

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Research Article

The effect of long working hours on 10-year risk of coronary heart disease and stroke in the Korean population: the Korea National Health and Nutrition Examination Survey (KNHANES), 2007 to 2013: Dong-Wook Lee, Yun-Chul Hong, Kyoung-Bok Min, Tae-Shik Kim, Min-Seok Kim, Mo-Yeol Kang; Ann Occup Environ Med 2016;28:64. Published online November 15, 2016; DOI: https://doi.org/10.1186/s40557-016-0149-5

Abstract PDF

Background

Recently, the emergence of long working hours and the associated conditions such as coronary heart disease (CHD) and stroke have gained attention. The aim of this study was to investigate the association between long working hours and the 10-year-risk of CHD and stroke, estimated by Jee’s health risk-appraisal model for ischemic heart disease.

Methods

We analyzed data from Koreans who randomly enrolled in Korean National Health and Nutrition Examination Survey 2008–2012 and finally included 13,799 participants. The participants were classified as per their working hours: 0–30 h/week, 31–39 h/week, 40 h/week, 41–50 h/week, 51–60 h/week, 61–70 h/week, 71–80 h/week, and >80 h/week. The risks for CHD and stroke were determined using Jee’s health risk-appraisal model. Multiple logistic regression was used to analyze the association between working hours and 10-year risk for CHD.

Results

The 10-year risks for CHD and stroke were significantly and positively associated with working hours in both men and women. Furthermore, higher risks for CHD and stroke were associated with longer working hours in women.

Conclusion

Long working hours are significantly associated with the risks of CHD and stroke, estimated by Jee’s health risk-appraisal model. This study suggests the need for proper management of working hours to reduce CHD risk and stroke risk in the Korean population.

Electronic supplementary material

The online version of this article (doi:10.1186/s40557-016-0149-5) contains supplementary material, which is available to authorized users.

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Research Article

Relationship of workplace violence and perpetrators on sleep disturbance-data from the 4th Korean working conditions survey: Taejun Yoo, Byeongjin Ye, Jung-Il Kim, Siwoo Park; Ann Occup Environ Med 2016;28:59. Published online October 19, 2016; DOI: https://doi.org/10.1186/s40557-016-0142-z

Abstract PDF

Objective

The present study analyzed relationship of workplace violence and perpetrators of violence on sleep disturbance among wage workers in Korea.

Methods

The present study used data from the 4th Korean Working Conditions Survey (KWCS) of 2014 in selecting a total of 25,138wage workers as the study population, which excluded those who failed or refused to respond to questions required for the present study. The workplace violence experience group included people who satisfied at least one of six relevant criteria (verbal abuse, unwanted sexual attention, threatening or humiliating behavior, physical violence, bullying/harassment, and sexual harassment) and the group was divided according to whether the perpetrator of violence was a client or colleague. Presence of sleep disturbance was determined based on subjective symptoms felt within the past 12 months by each individual. A multiple logistic regression analysis was performed to identify the effects on sleep distance according to general, occupational, and psychosocial characteristics, as well as the types of workplace violence and perpetrators of violence.

Results

Workplace violence was found as a factor affecting sleep disturbance (OR = 3.773, 95 % CI = 3.058–4.655), and with respect to perpetrators of violence, complaint of sleep disturbance symptoms was higher when the perpetrator was a colleague or boss (OR = 5.688, 95 % CI 4.189–7.723) than a client (OR = 2.992, 95 % CI 2.301–3.890).

Conclusion

Workplace violence had an effect on occurrence of sleep disturbance and when the perpetrators of violence was a boss or colleague at work, the risk for symptoms such as sleep disturbance increased, which indicated the need for appropriate intervention from a workplace healthcare perspective, including preventive education of workplace violence among employees.

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Research Article

Association between employment status and self-rated health: Korean working conditions survey: Kimin Kwon, Jae Bum Park, Kyung-Jong Lee, Yoon-Sik Cho; Ann Occup Environ Med 2016;28:43. Published online September 8, 2016; DOI: https://doi.org/10.1186/s40557-016-0126-z

Abstract PDF

Background

This research was conducted with an aim of determining the association between employment status and self-rated health.

Methods

Using the data from the Third Korean Working Conditions Survey conducted in 2011, We included data from 34,783 respondents, excluding employers, self-employed workers, unpaid family workers, others. Self-rated health was compared according to employment status and a logistic regression analysis was performed.

Results

Among the 34,783 workers, the number of permanent and non-permanent workers was 27,564 (79.2 %) and 7,219 (20.8 %). The risk that the self-rated health of non-permanent workers was poor was 1.20 times higher when both socio-demographic factors, work environment and work hazards were corrected.

Conclusions

In this study, perceived health was found to be worse in the non-permanent workers than permanent workers. Additional research should investigate whether other factors mediate the relationship between employment status and perceived health.

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Research Article

The association between Korean workers’ presenteeism and psychosocial factors within workplaces: Yun-Sik Cho, Jae Bum Park, Kyung-Jong Lee, Kyoung-Bok Min, Chul-In Baek; Ann Occup Environ Med 2016;28:41. Published online September 7, 2016; DOI: https://doi.org/10.1186/s40557-016-0124-1

Abstract PDF

Background

Presenteeism, a concept that has recently undergone active study, is the act of attending work while sick. This study investigates the association between presenteeism and various psychosocial factors within workplaces.

Methods

This study analyzed 29246 wage earners from the third Korean Working Conditions Survey (KWCS, 2011) data using the logistic regression analysis to investigate the association between presenteeism and various psychosocial factors within workplaces.

Results

Among the 29246 wage earners, 6347 (21.7 %) showed presenteeism. Those who experienced age discrimination at work (adjusted odds ratio (aOR) 1.77: 95 % CI 1.56–2.00), educational background discrimination (aOR 1.35: 95 % CI 1.22–1.51), regional discrimination (aOR 1.55: 95 % CI 1.31–1.83), sexual discrimination (aOR 1.65: 95 % CI 1.41–1.94), employment type discrimination (aOR 2.13: 95 % CI 1.89–2.40), physical violence (aOR 1.92: 95 % CI 1.45–2.55), sexual harassment (aOR 2.90: 95 % CI 2.01–4.19), job insecurity (aOR 1.36: 95 % CI 1.18–1.56), work–life imbalance (aOR 1.38: 95 % CI 1.29–1.47), low job satisfaction (aOR 2.04: 95 % CI 1.91–2.17), no colleague support (aOR 1.11: 95 % CI 1.02–1.21), job stress (aOR 1.89: 95 % CI 1.76–2.02), emotional labor (aOR 1.50: 95 % CI 1.41–1.60), high work intensity (aOR 1.31: 95 % CI 1.23–1.38), and 3 groups of job strain that are passive group (aOR 1.09: 95 % CI 1.00–1.18), active group (aOR 1.39: 95 % CI 1.28–1.51), and high strain group (aOR 1.35: 95 % CI 1.24–1.46) showed an increased risk of presenteeism compared to their respective counterparts (p < 0.01).

Conclusions

The study results confirmed the association between presenteeism and various psychosocial factors within workplaces. Considering that presenteeism negatively affects productivity and the mental and physical health of individuals, managing various psychosocial factors within workplaces is proposed to reduce presenteeism.

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Research Article

Employment and occupation effects on late-life depressive symptoms among older Koreans: a cross-sectional population survey: Hyun Park, Young Hwangbo, Yong-Jin Lee, Eun-Chul Jang, Wook Han; Ann Occup Environ Med 2016;28:22. Published online May 14, 2016; DOI: https://doi.org/10.1186/s40557-016-0107-2

Abstract PDF

Background

The present study investigated the prevalence of depressive symptoms in older Koreans and identified associations between depressive symptoms and occupational factors.

Methods

Data from the Korean National Health and Nutrition Examination Survey V (2010–2012) were used to analyze 7320 participants aged 55 years or older. Complex sample logistic regression analysis was performed after adjusting general characteristics to determine associations between depressive symptoms and occupational factors.

Results

Among older Korean men, the prevalence of depressive symptoms in the employed and the non-employed groups were 9.9 % and 13.7 %, respectively. Employment status was significantly associated with depressive symptoms after adjusting for general factors (OR: 0.69, 95 % CI: 0.49–0.97). Among older Korean women, the prevalence of depressive symptoms in the employed and the non-employed groups were 17.4 % and 20.3 %, respectively, but employment status was not significantly associated with depressive symptoms. Second skill level occupational groups (clerks, plant and machine operators) in particular showed significantly lower prevalence of depressive symptoms than the non-employed group of men (9.3 % vs 13.7 %). By occupation type, the odds ratios were 0.31 (95 % CI: 0.10–0.97, clerks) and 0.47 (95 % CI: 0.23–0.86, plant and machine operators) adjusting for general factors.

Conclusions

The employed group showed lower late-life depressive symptom prevalence than the non-employed group among older Korean men. In addition some second skill level occupations (clerks, plant and machine operators) were significantly associated with a lower risk of depressive symptoms after adjusting for general factors in older Korean men.

Citations

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Associations of non-employment with common mental disorder subcomponents among working age population: Analysis of national data from 1993, 2000, 2007 and 2014
Gayan Perera, KTDDP Jayapala, Mizanur Khondoker, Karen Glaser, Giorgio Di Gessa, Robert Stewart
International Journal of Social Psychiatry.2025; 71(2): 404. CrossRef
Restricted economic activity due to health conditions and risk of depression: results from the Korean Longitudinal Study of Aging
Il Yun, Jae-Hyun Kim, Jong Youn Moon
Frontiers in Public Health.2025;[Epub] CrossRef
Association of Geriatric Depressive Symptoms and Government-Initiated Senior Employment Program: A Population-Based Study
Soyeon Park, Yeojin Kim, Sunwoo Yoon, You Jin Nam, Sunhwa Hong, Yong Hyuk Cho, Sang Joon Son, Chang Hyung Hong, Jai Sung Noh, Hyun Woong Roh
Psychiatry Investigation.2024; 21(3): 284. CrossRef
Questionnaire-free machine-learning method to predict depressive symptoms among community-dwelling older adults
Sri Susanty, Herdiantri Sufriyana, Emily Chia-Yu Su, Yeu-Hui Chuang, Tarik A. Rashid
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Tania Bof de Andrade, Fabiola Bof de Andrade, Maria Carmen Viana
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Prevalence and factors associated with anxiety and depression among community-dwelling older adults in Hunan, China: a cross-sectional study
Lulu Lu, Hongxian Shen, Liwen Tan, Qiuping Huang, Qiongni Chen, Mining Liang, Li He, Yang Zhou
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Research Article

Association between night work and cardiovascular diseases: analysis of the 3rd Korean working conditions survey: Sungjin Park, Juhyun Nam, Jong-Ku Lee, Sung-Soo Oh, Hee-Tae Kang, Sang-Baek Koh; Ann Occup Environ Med 2015;27:15. Published online May 11, 2015; DOI: https://doi.org/10.1186/s40557-015-0064-1

Abstract PDF

Objectives

This study was conducted to investigate the relationship between night work and cardiovascular diseases among wage workers in Korea.

Methods

The study was based on the 3rd Korean Working Conditions Survey (KWCS; 2011). This study included 29,711 wage workers. We used the chi-squared test and logistic regression to examine the association between cardiovascular diseases and night work and cumulative night work.

Results

Among all of the paid workers, 12.5% reported doing night work ≥ 1 day per month. Night work was significantly associated with an increased risk of cardiovascular diseases (odds ratio [OR] 1.58, 95% confidence interval [CI] 1.11-2.25). Also, compared to the group that did not do night works, the group with higher cumulative night work demonstrated an increased risk for cardiovascular diseases (OR 1.81, 95% CI 1.19-2.74).

Conclusions

This study suggests that night work is significantly associated with cardiovascular diseases.

Citations

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Research Article

Presenteeism among self-employed workers: Korean working conditions survey: Min-Su Kim, Jae Bum Park, Kyoung-Bok Min, Kyung-Jong Lee, Kimin Kwon; Ann Occup Environ Med 2014;26:32. Published online October 1, 2014; DOI: https://doi.org/10.1186/s40557-014-0032-1

Abstract PDF

Objective

Presenteeism has become a public concern recently. Thus, we aimed to understand the relationship between self-employed workers and presenteeism using a nationally representative sample of Korean workers.

Methods

Using data from the Korean Working Conditions Survey conducted in 2011, a total of 43,392 workers including paid employees and self-employed workers were analyzed. The effect of employment status on presenteeism was analyzed using logistic regression analysis. The independent variables were socioeconomic characteristics, working conditions, and working environments.

Results

Among the 43,392 workers, 34,783 were paid and 8,609 were self-employed. Self-employed workers were more likely to exhibit presenteeism than were paid workers. An elevated odds ratio of 1.27 (95% CI 1.19-1.36) was found for presenteeism among self-employed workers.

Conclusion

Being self-employed was significantly related with exhibiting presenteeism. Additional research should investigate whether other factors mediate the relationship between employment status and presenteeism as well as ways to reduce presenteeism among self-employed workers.

Citations

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Sungjin Park, June-Hee Lee, Jongin Lee
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Youna Won, Hwan-Cheol Kim, Jiho Kim, Minsun Kim, Seong-Cheol Yang, Shin-Goo Park, Jong-Han Leem
Annals of Occupational and Environmental Medicine.2022;[Epub] CrossRef
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Albert Navarro, Sergio Salas‐Nicás, Clara Llorens, Salvador Moncada, Emilia Molinero‐Ruíz, David Moriña
American Journal of Industrial Medicine.2019; 62(7): 580. CrossRef
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