Annals of Occupational and Environmental Medicine

[Special Collection] Working hours as a social determinants of workers' health

Brief Communication

Working hours and the regulations for night shift workers: Tae-Won Jang; Ann Occup Environ Med 2023;35:e19. Published online July 5, 2023; DOI: https://doi.org/10.35371/aoem.2023.35.e19

There are several types of shift work in Korea: rotating shift, 24-hour shift, day-night shift, fixed night work, and.so on. As a result of analyzing the 8th Korea National Health and Nutrition Examination Survey and the 6th Korean Working Condition Survey, Korean shift workers accounted for 11.6%–13.9% of wage workers. Weekly working hours of shift workers were 57.69 ± 1.73 (24-hours shift) and 49.97 ± 0.67 (fixed night shift), which were significantly longer than day workers. To prevent health consequences of night work, many countries regulate the working hours of night work not to exceed 7–9 hours a day. However, Korea does not regulate working hours for night work, and some occupations may work more hours than the prescribed overtime hours. To prevent health consequences and reduce working hours for Korean night shift workers, it is necessary to regulate the working hours of night shift workers by law.

Citations

Citations to this article as recorded by

Association Between Types of Shift Work and Physical Health Symptoms, Including Musculoskeletal Symptoms and Sleep Disturbance: Evidence From the Seventh Korean Working Conditions Survey
Ji-Soo Jang, Sung-Kyung Kim, Sangwon Hwang, Hoon Jo, Hye-Seon Jeon
Journal of Occupational & Environmental Medicine.2026; 68(1): 34. CrossRef
Metabolic risk stratification of night shift workers in a large retail workplace through clustering and SHAP interpretation
InHo Lee, SangHee Hong, EunChul Jang, JuneHee Lee, JeongBeom Lee
Frontiers in Public Health.2026;[Epub] CrossRef
Gender differences in the association between long working hours and the onset of depressive symptoms in middle-aged and older workers in Korea: A population-based longitudinal study (2006–2022)
Seong-Uk Baek, Yu-Min Lee, Jong-Uk Won, Jin-Ha Yoon
Maturitas.2025; 193: 108175. CrossRef
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 of long working hours with visceral adiposity index, anthropometric indices, and weight management behaviors: a study of Korean workers
Seong-Uk Baek, Jin-Ha Yoon
Family Practice.2025;[Epub] CrossRef
Night Shift Stress: Evaluating Heart Rate Variability as a Marker in Security Guards
Shouray Dey, A V Vinay, R Sindhu, Shishir Kumar Mahto, Sachin Kumar Patil
Indian Journal of Occupational and Environmental Medicine.2025; 29(1): 49. CrossRef
Gender discrimination in the workplace and the onset of problematic alcohol use among female wage workers: A longitudinal study in Korea
Seong-Uk Baek, Jin-Ha Yoon, Jong-Uk Won
Social Science & Medicine.2025; 379: 118183. CrossRef
A digital, real-time, history-based sleep-management tool to enhance alertness
Yun Min Song, Su Jung Choi, Dongju Lim, Reinatt Hansel Wijaya, Hyeong Jun Jang, Hea Ree Park, Eun Yeon Joo, Jae Kyoung Kim
SLEEPJ.2025;[Epub] CrossRef
Human Rights Condition of Informal Labors of South-Western Bangladesh: A Review
Avijit Mallik
Journal of Human Rights and Social Work.2025;[Epub] CrossRef
Association between shift work and brain age gap: a neuroimaging study using MRI-based brain age prediction algorithms
Youjin Kim, Joon Yul Choi, Evgeny Petrovskiy, Wanhyung Lee
Frontiers in Aging Neuroscience.2025;[Epub] CrossRef
The association of shift work and TyG index among male workers in a chemical plant of Korea: a cross-sectional study
Gwangin Baek, Yong-Jin Lee, Soon-Chan Kwon, Young-Sun Min, Jisuk Yun, Tae Jin Ahn, Eun-Chul Jang
Annals of Occupational and Environmental Medicine.2024;[Epub] CrossRef
Association between long working hours and diet quality and patterns: A latent profile analysis of a nationally representative sample of Korean workers
Seong-Uk Baek, Jong-Uk Won, Yu-Min Lee, Jin-Ha Yoon
Preventive Medicine.2024; 180: 107890. CrossRef
Investigating night shift workers’ commuting patterns using passive mobility data
Sungho Lim, Haesung Ahn, Seungchul Shin, Dongmin Lee, Yong Hoon Kim
Transportation Research Part A: Policy and Practice.2024; 181: 104002. CrossRef
Multimorbidity and its Associated Factors in Korean Shift Workers: Population-Based Cross-Sectional Study
Hye Chong Hong, Young Man Kim
JMIR Public Health and Surveillance.2024; 10: e55014. CrossRef
Sex differences in the association between social jetlag and hazardous alcohol consumption in Korean workers: A nationwide cross-sectional study
Seong-Uk Baek, Jong-Uk Won, Yu-Min Lee, Jin-Ha Yoon
Sleep Medicine.2024; 119: 549. CrossRef
The Effect of 24 h Shift Work on the Nutritional Status of Healthcare Workers: An Observational Follow-Up Study from Türkiye
Semra Navruz Varlı, Hande Mortaş
Nutrients.2024; 16(13): 2088. CrossRef
Changes in Korea’s working time policy: the need for research on flexible working hours considering socioeconomic inequality
Inah KIM
Industrial Health.2024; 62(2): 77. CrossRef
Association between precarious employment and emergence of food insecurity in Korean adults: A population-based longitudinal analysis (2008–2022)
Seong-Uk Baek, Jin-Ha Yoon
Social Science & Medicine.2024; 362: 117448. CrossRef
Special Series I: Working hours as a social determinant of workers’ health
Kyunghee Jung-Choi, Tae-Won Jang, Mo-Yeol Kang, Jungwon Kim, Eun-A Kim
Annals of Occupational and Environmental Medicine.2023;[Epub] CrossRef

12,286 View
69 Download
20 Web of Science
19 Crossref

Research Article

Comparing risk of depression between day and night/shift workers using the PHQ-9: a study utilizing the 2014, 2016, and 2018 Korea National Health and Nutrition Examination Survey data: Jae-Han Lee, Sang-Woo Kim, Jae-Han Joo, Na-Rae Lee, June-Hee Lee, Kyung-Jae Lee; Ann Occup Environ Med 2021;33:e18. Published online June 9, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e18

Abstract Abstract in Korean PDF

Background

In today's work scenario, the number of shift workers, including those in night shifts, is increasing. Shift work can adversely affect workers' health in the long run, but studies on the relationship between shift work and depression have shown inconsistent results. This study aimed to determine whether the number of night/shift workers at risk of depression, as predicted by the Patient Health Questionnaire-9 (PHQ-9), is higher than that of day workers.

Methods

This study was conducted based on data from the 6th and 7th Korea National Health and Nutrition Examination Survey, 2014, 2016, and 2018. Work schedules were classified into 2 types: day work and night/shift work. This study used the PHQ-9, a self-reported depression screening test, to identify workers at risk of depression. Statistical analysis was performed using SPSS 26.0, and descriptive statistics, χ² test, and logistic regression analysis were employed.

Results

After adjusting for age, educational level, working hours per week, and income, men engaging in night/shift work were at a higher risk of depression (odds ratio [OR]: 1.407, 95% confidence interval [CI]: 0.937–2.113). The same was confirmed for women (OR: 1.564, 95% CI: 1.176–2.081).

Conclusions

Our results showed that the OR for those engaged in night/shift work with a PHQ-9 score of 10 or more increased. Considering the large volume of psychiatric history and symptoms in Korea, additional research is needed. Additionally, further discussion on ways to provide realistic help to night/shift workers is warranted.

교대근무 여부에 따른 PHQ-9을 이용한 근로자의 우울증 위험 비교: 2014, 2016 및 2018년 국민건강영양조사를 이용하여
목적
현대 사회에서는 야간 근무를 포함하여 다양한 업무를 수행하는 교대 근무자가 증가하고 있다. 교대 근무는 장기적으로 근로자의 건강에 악영향을 미칠 수 있지만 교대 근무와 우울증의 관계에 대한 연구 결과는 일관성이 없는 것으로 나타났다. 본 연구는 PHQ-9로 예측한 우울증에 걸릴 위험이 높은 국내 야간 및 교대 근무 근로자 수가 주간 근로자보다 많은지 여부를 확인하고자 한다.
방법
본 연구는 제 6 차 및 제 7 차 국민 건강 영양 조사 자료 중 2014, 2016년 및 2018년의 자료를 바탕으로 진행되었다. 근무 일정은 주간 근무와 야간 및 교대근무로 구분 하였다. 이 연구는 우울증에 걸릴 위험이 있는 근로자를 결정하기 위해 자가 보고 우울증 선별 검사 인 PHQ-9를 사용하였다. SPSS 23.0을 이용하여 통계 분석을 수행하였고 통계적 방법으로는 기술 통계, 카이 제곱 분석, 로지스틱 회귀 분석을 사용 하였다.
결과
연령, 교육 수준, 주당 근무 시간 및 수입으로 보정 후 분석하였을 때, 야간 및 교대 근무 근로자에서 우울증 위험군에 해당하는 경우가 유의하게 더 높았으며(odds ratio [OR] = 1.407 (95% confidence interval [CI]: 0.937–2.113)), 이는 여성에서도 마찬가지로 나타났다(odds ratio [OR] = 1.564 (95% confidence interval [CI]: 1.176–2.081)).
결론
본 연구를 통해 야간 및 교대근무 근로자에서 PHQ-9 점수가 10점 이상인 우울증 위험군에 해당하는 경우가 유의하게 높음을 확인할 수 있었다. 현재 한국의 정신 병력과 증상의 유병률을 고려할 때 야간 근로자에게 현실적인 도움을 제공 할 수 있는 방법에 대한 추가 논의와 함께 추가 연구가 필요하다.

Citations

Citations to this article as recorded by

Working Against the Clock: Depression and Hormonal Imbalance in Shift-Working Men
Niki Parikh, Amelia Oppenheimer, Juliet McNamara Alexander, David Hinojosa-Gonzalez, Gal Saffati, Mahdi Bazzi, Blair Stocks, Taylor Kohn, Larry Lipshultz
Urology.2025;[Epub] CrossRef
Night shift work, genetic risk, and the risk of depression: A prospective cohort study
Yanchun Chen, Hongxi Yang, Yuan Zhang, Lihui Zhou, Jing Lin, Yaogang Wang
Journal of Affective Disorders.2024; 354: 735. CrossRef
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

4,646 View
7 Download
2 Web of Science
3 Crossref

Research Article

The relationship between night work and breast cancer: Hye-Eun Lee, Jongin Lee, Tae-Won Jang, In-Ah Kim, Jungsun Park, Jaechul Song; Ann Occup Environ Med 2018;30:11. Published online February 6, 2018; DOI: https://doi.org/10.1186/s40557-018-0221-4

Abstract PDF

Background

Since the International Agency for Research on Cancer classified shift work that involves circadian disruption as “probably carcinogenic to humans,” there has been growing concern on the relationship between night work and breast cancer. In Korea, about 10–15% of workers are engaged in night-shift work, and breast cancer is one of the most common cancers in women. The purpose of this study was to review epidemiologic evidence on the relationship between night work and breast cancer.

Methods

We reviewed 21 original articles and 5 meta analyses on relationship between nightwork and breast cancer, and investigated the compensation criteria of Denmark.

Results

The association between breast cancer and night work has been reported by numerous epidemiologic studies, including cohort studies, case-control studies, and meta-analysis. However, a dose-response relationship has not clearly emerged among workers exposed to less than 20 years of night work.

Conclusion

Although there are some limitations to the epidemiological studies so far, further consideration of breast cancer cases in patients with high exposure to night work is needed to assess breast cancer as a work-related disease.

Citations

Citations to this article as recorded by

Characteristics of Workers’ Compensation Claims in South Korea’s Electronics Industry With a Focus on Occupational Cancers in the Semiconductor and Display Sectors (2013–2022)
Dong-Hee Koh, Hyoung-Ryoul Kim, Hyunchul Ryou, Dong-Uk Park
Journal of Occupational & Environmental Medicine.2025; 67(8): 646. CrossRef
Cancer du sein : une maladie professionnelle pour les soignants exposés au travail de nuit ?
M. Gonzalez, C. Mathelin
Gynécologie Obstétrique Fertilité & Sénologie .2024; 52(2): 65. CrossRef
Unlocking the health benefits of melatonin supplementation: A promising preventative and therapeutic strategy
Firas S. Azzeh, Waad W. Kamfar, Mazen M. Ghaith, Radi T. Alsafi, Ghalia Shamlan, Mai A. Ghabashi, Wesam F. Farrash, Reema A. Alyamani, Awfa Y. Alazzeh, Sarah O. Alkholy, El-Sayed H. Bakr, Alaa H. Qadhi, Ahmad F. Arbaeen
Medicine.2024; 103(38): e39657. CrossRef
Impact of Simulated Rotating Shift Work on Mammary Tumor Development in the p53R270H©/+WAPCre Mouse Model for Breast Cancer
Astrid A. Streng, Kirsten C. G. Van Dycke, Conny T. M. van Oostrom, Daniela C. F. Salvatori, Gerben Hulsegge, Inês Chaves, Till Roenneberg, Serge A. L. Zander, Harry van Steeg, Gijsbertus T. J. van der Horst, Linda W. M. van Kerkhof
Journal of Biological Rhythms.2023; 38(5): 476. CrossRef
Work Ability after Breast Cancer: Study of Healthcare Personnel Operating in a Hospital of South Italy
Francesca Vella, Veronica Filetti, Luigi Cirrincione, Venerando Rapisarda, Serena Matera, Alenka Skerjanc, Emanuele Cannizzaro, Ermanno Vitale
International Journal of Environmental Research and Public Health.2022; 19(17): 10835. CrossRef
Breast cancer awareness and knowledge assessment among men and women in Malaysia
Wan Ning Lee, Chon Phin Ong, Ala’a Sadiq M. Khamis, Nallammai Singaram, Sau Har Lee
Journal of Public Health.2022; 30(7): 1733. CrossRef
Assessment of risks for breast cancer in a flight attendant exposed to night shift work and cosmic ionizing radiation: a case report
Dong Joon Park, Sungkyun Park, Seong Won Ma, Hoekyeong Seo, Sang Gil Lee, Kyung-Eun Lee
Annals of Occupational and Environmental Medicine.2022;[Epub] CrossRef
Breast Cancer Incidence among Female Workers by Different Occupations and Industries: A Longitudinal Population-Based Matched Case–Control Study in Taiwan
Cheng-Ting Shen, Hui-Min Hsieh, Yun-Shiuan Chuang, Chih-Hong Pan, Ming-Tsang Wu
International Journal of Environmental Research and Public Health.2022; 19(16): 10352. CrossRef
Night Work and Breast Cancer Risk in Nurses: Multifactorial Risk Analysis
Juan Gómez-Salgado, Javier Fagundo-Rivera, Mónica Ortega-Moreno, Regina Allande-Cussó, Diego Ayuso-Murillo, Carlos Ruiz-Frutos
Cancers.2021; 13(6): 1470. CrossRef
Night Work and Its Health Effects: Focusing on the Relevant Laws and Regulations of the Republic of Korea
Won-Ju Park
Journal of Sleep Medicine.2021; 18(1): 1. CrossRef
Night-shift work duration and breast cancer risk: an updated systematic review and meta-analysis
E. Manouchehri, A. Taghipour, V. Ghavami, A. Ebadi, F. Homaei, R. Latifnejad Roudsari
BMC Women's Health.2021;[Epub] CrossRef
Exposure to Radiation During Work Shifts and Working at Night Act as Occupational Stressors Alter Redox and Inflammatory Markers
Sanaa A. El-Benhawy, Rasha A. El-Tahan, Sameh F. Nakhla
Archives of Medical Research.2021; 52(1): 76. CrossRef
Women's health and night shift work: Potential targets for future strategies in breast cancer (Review)
Giusi Briguglio, Chiara Costa, Michele Teodoro, Federica Giambò, Sebastiano Italia, Concettina Fenga
Biomedical Reports.2021;[Epub] CrossRef
Shift Work and Breast Cancer
Sarah Gehlert, Mark Clanton
International Journal of Environmental Research and Public Health.2020; 17(24): 9544. CrossRef
El cáncer ocupacional: una realidad oculta y un desafío pendiente
Marcos Larrosa Moles, Begoña Martínez-Jarreta
Medicina Clínica.2020; 154(1): 23. CrossRef
Immunoregulatory role of melatonin in cancer
Fatemeh Moradkhani, Milad Moloudizargari, Marjan Fallah, Narjes Asghari, Heidar Heidari Khoei, Mohammad Hossein Asghari
Journal of Cellular Physiology.2020; 235(2): 745. CrossRef
Nighttime Blue Light Exposure and Breast Cancer
David Jaynes, MS, PhD, Paul Switzer, MD
Osteopathic Family Physician.2020; 13(1): 30. CrossRef
Occupational cancer: A hidden reality and an awaiting challenge
Marcos Larrosa Moles, Begoña Martínez-Jarreta
Medicina Clínica (English Edition).2020; 154(1): 23. CrossRef
Cancer in the Fourth Dimension: What Is the Impact of Circadian Disruption?
Marie Pariollaud, Katja A. Lamia
Cancer Discovery.2020; 10(10): 1455. CrossRef
Gastric cancer mortality rates by occupation and industry among male and female workers aged 25–64 years in Japan
Yoko YOSHINAGA, Hirokazu TANAKA, Koji WADA, Shunya IKEDA
Industrial Health.2020; 58(6): 554. CrossRef
Night shift work and risk of breast cancer in women: the Generations Study cohort
Michael E. Jones, Minouk J. Schoemaker, Emily C. McFadden, Lauren B. Wright, Louise E. Johns, Anthony J. Swerdlow
British Journal of Cancer.2019; 121(2): 172. CrossRef
BRCA1 and BRCA2 Gene Expression: Diurnal Variability and Influence of Shift Work
Massimo Bracci, Veronica Ciarapica, Maria Eléxpuru Zabaleta, Maria Fiorella Tartaglione, Silvia Pirozzi, Letizia Giuliani, Francesco Piva, Matteo Valentino, Caterina Ledda, Venerando Rapisarda, Richard G. Stevens, Lory Santarelli
Cancers.2019; 11(8): 1146. CrossRef
Republication de : Surveillance et prévention des conséquences du travail poste et de nuit : état des lieux et recommandations
Arnaud Metlaine, Damien Leger, Yolande Esquirol
Médecine du Sommeil.2019; 16(3): 182. CrossRef
Sleep Assessment During Shift Work in Korean Firefighters: A Cross-Sectional Study
Kyoung Sook Jeong, Yeon-Soon Ahn, Tae-Won Jang, Gayoung Lim, Hyung Doo Kim, Seung-Woo Cho, Chang-Sun Sim
Safety and Health at Work.2019; 10(3): 254. CrossRef
Night shiftwork and prostate-specific antigen level in a tire manufacturing factory
Seunghyeon Cho, Won-Ju Park, WonYang Kang, Dae-Young Lim, Suwhan Kim, Jai-Dong Moon
Annals of Occupational and Environmental Medicine.2019;[Epub] CrossRef
Sex Differences in the Association between Night Shift Work and the Risk of Cancers: A Meta-Analysis of 57 Articles
Wen Liu, Zhonghan Zhou, Dahai Dong, Lijiang Sun, Guiming Zhang
Disease Markers.2018; 2018: 1. CrossRef
Surveillance et prévention des conséquences du travail poste et de nuit : état des lieux et recommandations
Arnaud Metlaine, Damien Leger, Yolande Esquirol
La Presse Médicale.2018; 47(11-12): 982. CrossRef

4,197 View
11 Download
25 Web of Science
27 Crossref

Research Article

The relationship between night work and involuntary weight change: data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012): Jongho Kwon, Jung-Woo Park, Jin-Soo Park, Seyoung Kim, Hyunrim Choi, Sinye Lim; Ann Occup Environ Med 2016;28:4. Published online January 29, 2016; DOI: https://doi.org/10.1186/s40557-016-0088-1

Abstract PDF

Background

Previous studies on the association between shift or night work and weight change have been focused on finding the risk of weight gain caused by shift or night work. In this study, we aimed to reveal the risk of weight gain and weight loss associated with night work by using a nationwide representative data.

Methods

This study was performed on 1605 full-time wage workers between the age of 20 and 69 based on the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012). The association between night work and involuntary weight change in the previous year was divided into the categories of weight gain and weight loss and studied with modifications in socio-demographic variables, health behavior-related variables, and occupational characteristic variables.

Results

The participants working in night work accounted for 10.6 % of total study participants (male; 11.9 %, female 7.4 %). Workers who worked more than 48 hours per week on average accounted for 41.6 % of the total study participants (male; 46.3 %, female 29.1 %).

Odds ratio (OR) of weight loss associated with night work in male workers was 0.34 (95 % confidence interval (CI) 0.16–0.76) after controlling for several related factors. OR of weight loss associated with night work in female workers with long working hours was 1.95 (95 % CI 0.47–80.86) and that of weight gain was 2.83 (95 % CI 0.12–69.83) after adjusting associated factors.

Conclusions

In this cross-sectional study with national representative sample, night work may lower the risk of weight loss in male workers and induce weight change (weight loss or weight gain) in female workers with long working hours. Therefore, future studies with cohort study design for night workers are needed to reveal the mechanisms and health effects of weight change associated with night work and establish proper management solutions with health and labor policies for Korean night workers.

Citations

Citations to this article as recorded by

Masa Başı Çalışanlarında Emosyonel Durum ve Yeme Tutumunun Değerlendirilmesi
Saliha YURTÇİÇEK EREN, Gözde ÇALIŞKAN AKIMAL, Neşe ÖZDEMİR
Turkish Journal of Family Medicine and Primary Care.2023; 17(4): 497. CrossRef
Assessment of the Impact of COVID-19 Lockdown on the Nutritional Status and Lipid Profile of Employees in a Teaching Hospital in Rome: A Retrospective Cohort Study
Lorenza Lia, Eleonora Ricci, Corrado Colaprico, Eleonora Di Legge, Augusto Faticoni, Lorenzo Maria Donini, Giuseppe La Torre
International Journal of Environmental Research and Public Health.2022; 19(8): 4549. CrossRef
Effect of work-related factors on the prevalence of peptic ulcer disease among Korean workers: a nationwide population-based study
Youn I Choi, Jun-Won Chung, Kyoung Oh Kim, Kwang An Kwon, Yoon Jae Kim, Dong Kyun Park
International Archives of Occupational and Environmental Health.2020; 93(8): 965. CrossRef
Changing patterns of multiple sclerosis in Korea: Toward a more baseline MRI lesions and intrathecal humoral immune responses
Hyun-June Shin, Jae-Won Hyun, Su-Hyun Kim, Min Su Park, Eun Hee Sohn, Seol-Hee Baek, Byung-Jo Kim, Kyomin Choi, Jeeyoung Oh, Joong-Yang Cho, Ohyun Kwon, Woojun Kim, Jee-Eun Kim, Ju-Hong Min, Byoung Joon Kim, Sun-Young Oh, Jong Seok Bae, Kee Hong Park, Jun
Multiple Sclerosis and Related Disorders.2019; 35: 209. CrossRef
Exposure effect to cement dust pollution: a mini review
Emmanuel Adeyanju, Chukwueloka Austin Okeke
SN Applied Sciences.2019;[Epub] CrossRef
Spontaneous and repeat spontaneous abortion risk in relation to occupational characteristics among working Korean women: a cross-sectional analysis of nationally representative data from Korea
Wanhyung Lee, Sung Won Jung, Young-Mee Lim, Kyung-Jae Lee, June-Hee Lee
BMC Public Health.2019;[Epub] CrossRef
Weight gain and body mass index following change from daytime to night shift – a panel study with nursing professionals
Kali Siqueria, Rosane Griep, Lúcia Rotenberg, Aline Silva-Costa, Maria de Jesus Mendes da Fonseca
Chronobiology International.2016; 33(6): 776. CrossRef
Effects of shift work on abdominal obesity among 20–39-year-old female nurses: a 5-year retrospective longitudinal study
Gyeong-Jin Lee, Kunhyung Kim, Se-yeong Kim, Jeong-Ho Kim, Chunhui Suh, Byung-Chul Son, Chae-Kwan Lee, Junghye Choi
Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef

1,960 View
1 Download
8 Web of Science
8 Crossref

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

Citations to this article as recorded by

The Impact of Poor Sleep Quality on Cardiovascular Risk Factors and Quality of Life
Chidinma J Onyegbule, Chioma G Muoghalu, Cosmas C Ofoegbu, Franklin Ezeorah
Cureus.2025;[Epub] CrossRef
Study on the association between night shift work and reproductive functions among male workers: a systematic review and meta-analysis
Ankit Viramgami, Rakesh Balachandar, Bhavani Shankara Bagepally, Ankit Sheth
Endocrine.2025; 88(2): 410. CrossRef
Effects of Gamitaeeumjowee-tang for Weight Loss in Overweight and Obese Shift Workers: A Retrospective Chart Review
Yunjin Lee, Hyojoo Choi, Jeong-In Kang, Young-Woo Lim, Eunjoo Kim
Journal of Korean Medicine.2025; 46(3): 1. CrossRef
The Effect of Night Shift Work on Health of Healthcare Workers
I. Cekova, R. Stoyanova, E. Marinova, K. Vangelova
Acta Medica Bulgarica.2024; 51(s2): 67. CrossRef
Arterial hypertension in mine pit miners
Ljiljana Kulić, Vesna Krstović-Spremo, Jovica Jovanović, Milivoje Galjak, Oliver Bojčeski, Jovana Jovanović
Zdravstvena zastita.2023; 52(1): 40. CrossRef
Trabalho noturno e pressão arterial: um estudo com foco nas doses de exposição
Aline Silva-Costa, Bruna Pereira Braz, Rosane Härter Griep, Lúcia Rotenberg
Revista Brasileira de Saúde Ocupacional.2021;[Epub] CrossRef
The Vascular Circadian Clock in Chronic Kidney Disease
Søren Egstrand, Maria L. Mace, Klaus Olgaard, Ewa Lewin
Cells.2021; 10(7): 1769. CrossRef
Mediation analysis of dietary habits, nutrient intakes, daily life in the relationship between working hours of Korean shift workers and metabolic syndrome : the sixth (2013 ~ 2015) Korea National Health and Nutrition Examination Survey
Yoona Kim, Hyeon Hee Kim, Dong Hoon Lim
Journal of Nutrition and Health.2018; 51(6): 567. CrossRef
Altered Circadian Timing System-Mediated Non-Dipping Pattern of Blood Pressure and Associated Cardiovascular Disorders in Metabolic and Kidney Diseases
Asadur Rahman, Arif Hasan, Akira Nishiyama, Hiroyuki Kobori
International Journal of Molecular Sciences.2018; 19(2): 400. CrossRef
Evaluation of high blood pressure and obesity among US coal miners participating in the Enhanced Coal Workers’ Health Surveillance Program
Megan Lauren Casey, Kathleen B. Fedan, Nicole Edwards, David J. Blackley, Cara N. Halldin, Anita L. Wolfe, Anthony Scott Laney
Journal of the American Society of Hypertension.2017; 11(8): 541. CrossRef
Effect of shift work on hypertension: cross sectional study
Jeong Han Yeom, Chang Sun Sim, Jiho Lee, Seok Hyeon Yun, Sang Jin Park, Cheol-In Yoo, Joo Hyun Sung
Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef
Daily rhythms count for female fertility
Valérie Simonneaux, Thibault Bahougne, Eleni Angelopoulou
Best Practice & Research Clinical Endocrinology & Metabolism.2017; 31(5): 505. CrossRef
Horloge interne désynchronisée : pourquoi et comment?
Yvan Touitou
Bulletin de l'Académie Nationale de Médecine.2015; 199(7): 1073. CrossRef

1,973 View
6 Download
9 Web of Science
13 Crossref

Original Article

An Association between Working Schedules and Depression in Public Sector Employees: Hyeon Taek Heo, Dong Won Kim, Jong Seok Lee, Hyeon A Jo, Seong Sil Jang, Soo Young Kim, In Ah Kim; Korean Journal of Occupational and Environmental Medicine 2012;24(4):347-355. Published online December 31, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.4.347

Abstract PDF

OBJECTIVES
This study determined the work schedules of public project workers who work an irregular shift and assessed the effect of these schedules on depression.
METHODS
Study subjects were 2934 laborers who are members of seven labor unions. Each was given a questionnaire requesting basic personal information, habits, socioeconomic status, and work schedules. Information gathered on work schedules included daytime, nighttime, and weekend work hours. Depression was evaluated using the Beck Depression Inventory (BDI), with Laborers who checked "not depressed" and "slightly depressive" categorized to a low-risk group, whereas laborers who checked "depressed" and "severely depressed" were categorized to a high-risk group. We used the Chi-square test and multivariate logistic regression to examine associations between work schedules and depression.
RESULTS
Laborers on an irregular work schedule averaged 47.8 hours/week and laborers who working over 48 hours/week comprised over half (54.5%) of the total population. Laborers performing night work, Sunday work, and Saturday work more than once in a month made up 25.7%, 30.8% and 33.5% of the examined population, respectively. A high-risk for depression was identified in 10.4% of laborers. Using logistic regression, depression was statistically associated with working : over 10 hours a day (OR=1.63, 95% CI 1.10~2.43), night work (OR=2.20, 95% CI 1.46~3.32), Sunday work (OR=1.81, 95% CI 1.15~2.85) and Saturday work (OR=1.82 95% CI 1.18~2.82).
CONCLUSION
A significant number of laborers with irregular working shifts work long hours and on weekends. Depression was significantly associated with this type of work schedule.

Citations

Citations to this article as recorded by

Association of Job Shift Length with Quality Nursing Care in Tertiary Care Hospitals, Khyber Pakhtunkhwa
Abdul Karim, Abdal Khan, Mansoor Khan, Jamal Khan, Tariq Habib, Muhammad Ali Shan, Muhammad Yaseen, Sheraz Khan
NURSEARCHER (Journal of Nursing & Midwifery Sciences).2024; : 17. CrossRef
The effect of American Hairdressers’ Work Hours and Wage Level on Job Satisfaction and Work-Life Balance
Young-Hee Noh, Byung-Lim Lee, Ji-In Kim
Journal of the Korean Society of Cosmetology.2023; 29(1): 124. CrossRef
Association of Working Hours and Patient Safety Competencies with Adverse Nurse Outcomes: A Cross-Sectional Study
Youn-Jung Son, Eun Kyoung Lee, Yukyung Ko
International Journal of Environmental Research and Public Health.2019; 16(21): 4083. CrossRef
Working hours and depressive symptoms over 7 years: evidence from a Korean panel study
Seoyeon Ahn
International Archives of Occupational and Environmental Health.2018; 91(3): 273. CrossRef
Relationship Between Long Working Hours and Metabolic Syndrome Among Korean Workers
Jungok Yu
Asian Nursing Research.2017; 11(1): 36. CrossRef
Effect of working hours and precarious employment on depressive symptoms in South Korean employees: a longitudinal study
Woorim Kim, Eun-Cheol Park, Tae-Hoon Lee, Tae Hyun Kim
Occupational and Environmental Medicine.2016; : oemed-2016-103553. CrossRef
Study on Health Consciousness and Eating Habits of Workers at Deluxe Hotels in Seoul and Gyonggi-do regions
Jae Joong Kim, Eun Jung Lee, Kyung-Ran Lee
Journal of The Korean Society of Food Culture.2016; 31(6): 587. CrossRef
A Study on the Health Consciousness and Eating Habits of the Seongnam Dining Owners
Wookyoun Cho
Journal of The Korean Society of Food Culture.2015; 30(4): 447. CrossRef
Health status and related factors in farmers by SF-12
Kyungeun Park, Sooyong Roh, Jihoon Lee, Soon Chan Kwon, Mihye Jeong, Soo-jin Lee
Annals of Occupational and Environmental Medicine.2015;[Epub] CrossRef
Factors Associated with Depression among Workers by Socio-economic Factors, Health Behaviors, and Characteristics of Work Environment
Hyunkyung Lee, Minsung Sohn, Mankyu Choi
Korean Journal of Health Education and Promotion.2013; 30(5): 125. CrossRef

859 View
1 Download
10 Crossref

First
Prev
Page of 1
Next
Last

Search