Skip Navigation
Skip to contents

Ann Occup Environ Med : Annals of Occupational and Environmental Medicine

OPEN ACCESS
SEARCH
Search

Search

Page Path
HOME > Search
11 "Long working hours"
Filter
Filter
Article category
Keywords
Publication year
Authors
Original Article
Association between long working hours and liver enzymes: evidence from the Korea National Health and Nutrition Examination Survey, 2007–2017
Ji-Hun Song, Hyoung-Ryoul Kim, Dong-Wook Lee, Jeehee Min, Yu Min Lee, Mo-Yeol Kang
Ann Occup Environ Med 2022;34:e9.   Published online May 13, 2022
DOI: https://doi.org/10.35371/aoem.2022.34.e9
AbstractAbstract AbstractAbstract in Korean PDFSupplementary MaterialPubReaderePub
Background

Long working hours causes several health risks, but little is known about its effects on the liver. This study aimed to examine the correlation between working hours and abnormal liver enzyme levels.

Methods

We used data from the Korea National Health and Nutrition Examination Survey IV–VII. For the final 15,316 study participant, the information on working hours was obtained through questionnaires, and liver enzyme levels, consisting of serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT), through blood tests. The relationship between weekly working hours and abnormal levels of liver enzymes was analyzed using multiple logistic regression, and a trend test was also conducted.

Results

In male, working ≥ 61 hours per week was significantly associated with elevated AST and ALT levels compared with working 35–52 hours per week. Even after adjusting for covariates, the odds ratios (ORs) of abnormal AST and ALT increased by 1.51 (95% confidence interval: 1.20–2.05) and 1.25 (1.03–1.52), respectively, and a dose-response relationship was observed. This association was more prominent among the high-risk group, such as those aged > 40 years, obese individuals, worker on non-standard work schedule, pink-collar workers, or temporary worker. No correlation was observed in female.

Conclusions

Long working hours are associated with abnormal liver function test results in male. Strict adherence to statutory working hours is necessary to protect workers’ liver health.

장시간 노동과 간기능 이상의 상관성: 2007-2017 국민건강영양조사 자료를 이용하여
목적
장시간 노동은 여러 가지 건강상의 위험을 초래하지만 간에 미치는 영향에 대해서는 아직까지 알려진 바가 거의 없다. 본 연구는 근로시간과 간기능 이상과의 상관관계를 알아보는 것을 목적으로 하였다.
방법
본 연구를 위해 4-7차 국민건강영양조사 자료를 사용하였다. 최종 연구참여자 15,316명을 대상으로 설문지를 통해 근무시간 정보를 얻었고 혈액검사를 통해 혈청 아스파르테이트아미노트랜스퍼라제(AST)와 알라닌아미노트랜스퍼라제(ALT)로 구성된 간효소치 정보를 얻었다. 다중 로지스틱 회귀 분석을 통해 주당 근무 시간과 간효소 이상 수치와의 관계를 분석하고 추세 검정도 함께 진행하였다.
결과
남성의 경우 주당 35-52시간 일하는 것에 비해, 법정 최대 근로시간을 초과한 주당 53-60시간을 근무하여도 AST 및 ALT 수치의 유의한 상승이 관찰되진 않았으나, 주당 60시간을 초과하여 일하는 경우 유의하게 상승하였다. 공변량을 보정한 후에도 AST와 ALT이상수치의 교차비(ORs)가 각각 1.51 (95% 신뢰 구간: 1.20-2.05) 및 1.25 (1.03-1.52) 증가하여 용량-반응 관계가 관찰되었다. 이 연관성은 40세 이상, 비만인, 비정규시간 근로자, 핑크 칼라 노동자, 임시직 노동자와 같은 고위험군에서 더 두드러졌다. 여성에서는 상관관계가 관찰되지 않았다.
결론
남성의 경우 장시간 노동은 간기능 검사 결과 이상과 관련이 있다. 근로자의 간 건강을 보호하기 위해서는 법정 근로시간을 철저히 준수하는 것이 필요하다.

Citations

Citations to this article as recorded by  
  • Association between long working hours and metabolic dysfunction–associated steatotic liver disease: a nationwide population-based study in Korea
    S.-U. Baek, J.-U. Won, Y.-M. Lee, J.-H. Yoon
    Public Health.2024; 232: 188.     CrossRef
  • Long working hours and increased risks of lean non-alcoholic fatty liver disease among Korean men and women
    Ga-Young Lim, Yoosoo Chang, Inah Kim, Seungho Ryu, Ria Kwon, Jaechul Song
    Scientific Reports.2023;[Epub]     CrossRef
  • The associations of health behaviors and working hours with high-sensitivity C-reactive protein levels in Korean wage workers: a cross-sectional study
    Choong-Won Seo, Eun-A Park, Tae-Hyung Yoon
    Osong Public Health and Research Perspectives.2023; 14(5): 356.     CrossRef
  • 245 View
  • 2 Download
  • 3 Web of Science
  • 3 Crossref
Close layer
Research Article
Relationship between working hours and probability to take alopecia medicine among Korean male workers: a 4-year follow-up study
Kyung-Hun Son, Byung-Seong Suh, Han-Seur Jeong, Min-Woo Nam, Hyunil Kim, Hyeong-Cheol Kim
Ann Occup Environ Med 2019;31:e12.   Published online July 11, 2019
DOI: https://doi.org/10.35371/aoem.2019.31.e12
AbstractAbstract PDFPubReaderePub
Background

Many studies have reported the negative effects of long working hours on various health problems. However, whether hair loss is associated with working hours has been rarely investigated so far. The main purpose of this study is to explore the relationship between long working hours and the development of alopecia among Korean male workers.

Methods

A total of 13,391 male workers not to take alopecia medicine in 2013 were followed up to see if they have alopecia medicine after 4 years, and that was used to confirm the alopecia development. Weekly working hours were categorized into three groups: reference working hours (RWH; < 40 hours/week), long working hours (LWH, 40–52 hours/week), and much longer working hours (MLWH; > 52 hours/week). Multiple logistic regression analyses were conducted to investigate the relationship between long working hours and the development of alopecia after adjusting age, marital status, education, monthly household income, smoking, and work schedule within strata of the covariates.

Results

Long working hours was significantly related to the development of alopecia. The adjusted odds ratios (ORs) for the development of alopecia were 1.57 (95% confidence interval [CI]: 1.21–2.05) for LWH group and 1.74 (95% CI: 1.23–2.47) for MLWH group relative to RWH group.

Conclusions

Our findings suggest that unintentional development of alopecia is another potential health consequence of long working hours among Korean male workers. Preventive interventions to promote appropriate and reasonable working hours are required in our society.


Citations

Citations to this article as recorded by  
  • Clinical Patterns of Hair Loss in Men
    Natalie Kash, Matt Leavitt, Adam Leavitt, Spencer D. Hawkins, Rahil B. Roopani
    Dermatologic Clinics.2021; 39(3): 361.     CrossRef
  • Activation of Hair Cell Growth Factors by Linoleic Acid in Malva verticillata Seed
    Hwa Sun Ryu, JiYeon Jeong, Chun Mong Lee, Kwang Sik Lee, Jung-No Lee, Sung-Min Park, Yong-Moon Lee
    Molecules.2021; 26(8): 2117.     CrossRef
  • 367 View
  • 0 Download
  • 3 Web of Science
  • 2 Crossref
Close layer
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
AbstractAbstract PDFPubReaderePub
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.


Citations

Citations to this article as recorded by  
  • Assessment of the musculoskeletal discomfort scale for upper limb among workers in inner Brazil
    Lara Karine Dias Silva, Alline Thamyres Claudino da Silva, Camyla Ferreira Moreno, Eloyse Ricely Machado de Souza, Tamires Fernanda Barbosa Nunes, Larissa Ane Hora de Souza, Lizandra Garcia Lupi Vergara, Jonhatan Magno Norte da Silva, Karen Jacobs, Remko
    Work.2024; 78(1): 83.     CrossRef
  • Study of musculoskeletal disorders risk factors and discomfort in sculptors in the north of Mexico
    Patricia Eugenia Sortillón-González, Aidé Aracely Maldonado-Macías, David Saénz-Zamarrón, Juan Luis Hernandez-Arellano, Enrique Javier De la Vega-Bustillos, Karen Jacobs, Remko Soer
    Work.2024; 78(1): 55.     CrossRef
  • ‘Wait…, let me tell you, if I worked for a boss, I would be on sick leave': A Qualitative Study of Self-Employed Workers in Physically Demanding Jobs in the Netherlands
    Bart Cillekens, Judith M. Mollet, Rixt A. Smit, P. Paul F. M. Kuijer, Pieter Coenen
    Journal of Occupational Rehabilitation.2024; 34(3): 644.     CrossRef
  • Biomechanical risk factors and subacromial pain provocation in healthy manufacturing workers
    Claudio Muñoz-Poblete, Jaqueline Inostroza, Juan Carranza-Leiva
    International Journal of Occupational Safety and Ergonomics.2024; : 1.     CrossRef
  • Investigation of prevalence and risk factors of musculoskeletal disorders among tea harvesting farmers – A systematic review
    Bahram Kouhnavard, Mojtaba Khosravi Danesh, Mansour Shamsipour, Adel Mazloumi
    Work.2024; : 1.     CrossRef
  • Work-related musculoskeletal symptoms among Saudi radiologists: a cross-sectional multi-centre study
    Magbool Alelyani, Moawia Gameraddin, Abdullah Mohammed A. Khushayl, Aljoharah M. Altowaijri, Maryam Ibrahim Qashqari, Fahad Ali Ahmed Alzahrani, Awadia Gareeballah
    BMC Musculoskeletal Disorders.2023;[Epub]     CrossRef
  • Association between irregular working hours and work-related musculoskeletal pain: results from the 6th Korean Working Conditions Survey
    Munyoung Yang, Jun-Pyo Myong, Jongin Lee, Min Young Park, Mo-Yeol Kang
    Annals of Occupational and Environmental Medicine.2023;[Epub]     CrossRef
  • Longer working hours and musculoskeletal pain: a meta-analysis
    Sohrab Amiri
    International Journal of Occupational Safety and Ergonomics.2023; 29(1): 1.     CrossRef
  • Prevalence and risk factors of work-related musculoskeletal disorders among emerging manufacturing workers in Beijing, China
    Xiaowen Ding, Ziyi Guan, Nan Liu, Mingli Bi, Fang Ji, Huining Wang, Xueyan Zhang, Baolong Liu, Dongsheng Niu, Tian Lan, Tingting Xie, Jue Li, Tenglong Yan
    Frontiers in Medicine.2023;[Epub]     CrossRef
  • The association between adverse ergonomic factors and work-related musculoskeletal symptoms among medical staff in China: a cross-sectional study
    Fei Liu, Ning Jia, Chuansha Wu, Jingzhi Sun, Gang Li, Huadong Zhang, Dongxia Li, Rugang Wang, Jing Liu, Tianlai Li, Jixiang Liu, Ruijie Ling, Zhongxu Wang
    Ergonomics.2023; : 1.     CrossRef
  • Does an increase in working hours affect mortality risk? The relationship between working hours and mortality among the older population
    Murat A. Mercan, Hande Barlin, Nazire Begen
    Work.2022; 71(3): 625.     CrossRef
  • Associations Between Workplace Violence, Mental Health, and Physical Health among Korean Workers: The Fifth Korean Working Conditions Survey
    Hae Ran Kim
    Workplace Health & Safety.2022; 70(3): 161.     CrossRef
  • The incidence of work-related musculoskeletal pain among administrators in a South African university
    L.M. Moraba, T.J. Ellapen, Y. Paul
    African Journal for Physical Activity and Health Sciences (AJPHES).2022; 28(3): 218.     CrossRef
  • The prevalence of MSDs and the associated risk factors in nurses of China
    Liang Tang, Guozhen Wang, Wei Zhang, Jie Zhou
    International Journal of Industrial Ergonomics.2022; 87: 103239.     CrossRef
  • Effects of multiple risk factors on upper limb musculoskeletal disorders among workers in inner Brazil
    Iris Lima da Silva, Eloyse Ricely Machado de Souza, Lara Karine Dias Silva, Alline Thamyres Claudino da Silva, Jonhatan Magno Norte da Silva
    Work.2022; 72(3): 885.     CrossRef
  • A Study on the Factors Influencing Overall Fatigue and Musculoskeletal Pains in Automobile Manufacturing Production Workers
    Jun Won Kim, Byung Yong Jeong, Myoung Hwan Park
    Applied Sciences.2022; 12(7): 3528.     CrossRef
  • Prevalence and Factors Associated with Musculoskeletal Disorders among Thai Burley Tobacco Farmers
    Amarin Kongtawelert, Bryan Buchholz, Dusit Sujitrarath, Wisanti Laohaudomchok, Pornpimol Kongtip, Susan Woskie
    International Journal of Environmental Research and Public Health.2022; 19(11): 6779.     CrossRef
  • Effectiveness and response differences of a multidisciplinary workplace health promotion program for healthcare workers
    Kai-Hung Cheng, Ning-Kuang Wu, Chao-Tung Chen, Chih-Yu Hsu, Yen-An Lin, John Jiin-Chyuan Luo, Li-Ang Lee, Hai-Hua Chuang
    Frontiers in Medicine.2022;[Epub]     CrossRef
  • Prevalence and associated factors of lower extremity musculoskeletal disorders among manufacturing workers: a cross-sectional study in China
    Xu Jin, Yidan Dong, Fujiang Wang, Ping Jiang, Zhongbin Zhang, Lihua He, Mikael Forsman, Liyun Yang
    BMJ Open.2022; 12(2): e054969.     CrossRef
  • Factors Associated with Musculoskeletal Disorders among Regular and Special Education Teachers: A Narrative Review
    Ahmad Asyraf Abdul Rahim, Mohammad Saffree Jeffree, Dayang Maryama Ag Daud, Nicholas Pang, Mohd Fazeli Sazali
    International Journal of Environmental Research and Public Health.2022; 19(18): 11704.     CrossRef
  • Investigating the relationship between working time characteristics on musculoskeletal symptoms: a cross sectional study
    Jennifer L Garza, Jacqueline M Ferguson, Alicia G Dugan, Ragan E Decker, Rick A Laguerre, Adekemi O Suleiman, Jennifer M Cavallari
    Archives of Environmental & Occupational Health.2022; 77(2): 141.     CrossRef
  • Long working hours and risk of 50 health conditions and mortality outcomes: a multicohort study in four European countries
    Jenni Ervasti, Jaana Pentti, Solja T. Nyberg, Martin J. Shipley, Constanze Leineweber, Jeppe K. Sørensen, Lars Alfredsson, Jakob B. Bjorner, Marianne Borritz, Hermann Burr, Anders Knutsson, Ida E.H. Madsen, Linda L. Magnusson Hanson, Tuula Oksanen, Jan H.
    The Lancet Regional Health - Europe.2021; 11: 100212.     CrossRef
  • Factors Associated with Musculoskeletal Disorders Among Female Readymade Garment Workers in Bangladesh: A Comparative Study Between OSH Compliant and Non-Compliant Factories
    Mohammad Hayatun Nabi, Pornpimol Kongtip, Susan Woskie, Noppanun Nankongnab, Dusit Sujirarat, Suttinun Chantanakul
    Risk Management and Healthcare Policy.2021; Volume 14: 1119.     CrossRef
  • Influence of risk factors associated with musculoskeletal disorders on an inner population of northeastern Brazil
    Deividson Sá Fernandes de Souza, Jonhatan Magno Norte da Silva, João Vítor de Oliveira Santos, Maria Sonaira Braz Alcântara, Manoel Gerônio Lino Torres
    International Journal of Industrial Ergonomics.2021; 86: 103198.     CrossRef
  • The Relationship of Grip and Pinch Strength to Musculoskeletal Disorders in Female Carpet Weavers in Southeastern Iran, 2019
    Naser Hashemi Nejad, Mostafa Mohammadian, Ali Akbar Haghdoost, Esmail Charkhloo
    Indian Journal of Occupational and Environmental Medicine.2021; 25(3): 138.     CrossRef
  • The relationship between chronotypes and musculoskeletal problems in male automobile manufacturing workers
    Suwhan Kim, Won-Ju Park, Seunghyeon Cho, Dae-Young Lim, Yeongjae Yoo, Hyeonjun Kim, Wonyang Kang, Kyung Wook Kang, Jai-Dong Moon
    Annals of Occupational and Environmental Medicine.2021;[Epub]     CrossRef
  • The Association Between Long Working Hours and Infertility
    Joonho Ahn, Sang Ha Lee, Min Young Park, Soo Hyun Oh, Wanhyung Lee
    Safety and Health at Work.2021; 12(4): 517.     CrossRef
  • Interaction between occupational physical burdens and low job control on musculoskeletal pain: Analysis of the 5th Korean Working Environment Survey
    Jongin Lee, Hyoung-Ryoul Kim, Dong-Wook Lee, Mo-Yeol Kang
    Journal of Occupational Health.2021;[Epub]     CrossRef
  • PEMILIHAN ANALGESIK EKSTERNAL UNTUK MENGATASI NYERI OTOT PADA KULI ANGKUT PUSAT GROSIR SURABAYA
    Nida Septioning Sukma, Devy Maulidya Cahyani, Yuniar Tri Saskia Revi, Evelyn Clarissa Febiany, Fatihatul Alifiyah, Berlian Sarasitha Hariawan, Iffah Khosyyatillah, Ni’matul Khoiriyyah, Savira Putri Ayuningtyas, Firda Rosyidah, Mufarrihah Mufarrihah
    Jurnal Farmasi Komunitas.2020; 7(1): 23.     CrossRef
  • Factors Related to Physical and Mental Health in Workers With Different Categories of Employment
    Jungsun Park, Yangho Kim
    Journal of Occupational & Environmental Medicine.2020; 62(7): 511.     CrossRef
  • Prevalence and predictors of work-related musculoskeletal disorders among workers of a gold mine in south Kivu, Democratic Republic of Congo
    Alfred Okello, Solomon Tsebeni Wafula, Deogratias K. Sekimpi, Richard K. Mugambe
    BMC Musculoskeletal Disorders.2020;[Epub]     CrossRef
  • Association of Exposure to a Combination of Ergonomic Risk Factors with Musculoskeletal Symptoms in Korean Workers
    Jungsun Park, Yangho Kim
    International Journal of Environmental Research and Public Health.2020; 17(24): 9456.     CrossRef
  • Prevalence of work-related musculoskeletal symptoms and associated risk factors among domestic gas workers and staff of works department in Enugu, Nigeria: a cross-sectional study
    Chinenye Doris Oluka, Esther Obidike, Antoninus Obinna Ezeukwu, Ogochukwu Kelechi Onyeso, Echezona Nelson Dominic Ekechukwu
    BMC Musculoskeletal Disorders.2020;[Epub]     CrossRef
  • Factors related to the risk of illness of nursing staff at work in a psychiatric institution
    Kayo Henrique Jardel Feitosa Sousa, Regina Célia Gollner Zeitoune, Luciana Fernandes Portela, Gisele Massante Peixoto Tracera, Katerine Gonçalves Moraes, Rachel Ferreira Savary Figueiró
    Revista Latino-Americana de Enfermagem.2020;[Epub]     CrossRef
  • Leisure time management in the workplace: Providing a model
    Farkhondeh Forouzan, Hadi Teimouri, Ali Safari
    Human Systems Management.2020; 39(3): 399.     CrossRef
  • 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
    Annals of Occupational and Environmental Medicine.2019;[Epub]     CrossRef
  • Prevalence, patterns, and coping strategies of musculoskeletal disorders among caterers in the selected local government areas of Lagos State in Nigeria, 2017
    Ashiyat Akodu, Ibitayo Famose
    Journal of Occupational Health and Epidemiology.2019; 8(1): 29.     CrossRef
  • The Effects of Workplace Rest Breaks on Health Problems Related to Long Working Hours and Shift Work among Male Apartment Janitors in Korea
    Sungjin Park, June-Hee Lee, Wanhyung Lee
    Safety and Health at Work.2019; 10(4): 512.     CrossRef
  • 247 View
  • 3 Download
  • 40 Web of Science
  • 38 Crossref
Close layer
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
AbstractAbstract PDFPubReaderePub
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.


Citations

Citations to this article as recorded by  
  • Barriers and enablers of pelvic floor rehabilitation behaviours in pregnant women with stress urinary incontinence: a qualitative analysis using the theoretical domains framework
    Ping Xu, Ying Jin, Pingping Guo, Xuefen Xu, Xiaojuan Wang, Wei Zhang, Minna Mao, Suwen Feng
    BMC Pregnancy and Childbirth.2023;[Epub]     CrossRef
  • Poor worker’s long working hours paradox: evidence from the Korea National Health and Nutrition Examination Survey, 2013-2018
    Min Young Park, Jaeyoung Park, Jun-Pyo Myong, Hyoung-Ryoul Kim, Dong-Wook Lee, Mo-Yeol Kang
    Annals of Occupational and Environmental Medicine.2022;[Epub]     CrossRef
  • Primary Exploration of Efficacy of Community-Family Management Mode under Internet-Based Mobile Terminal Monitoring in Elderly Patients with Stable Coronary Heart Disease
    Xiang Li, Wenwu Zheng, Jinsong Li, Yibin Gao, Qiang Lin, Jinfeng Yang, Shuiying Huang, Defang Wang, Bin Wang, Bhagyaveni M.A
    Journal of Healthcare Engineering.2022; 2022: 1.     CrossRef
  • An Index to Assess Overwork-Related Adverse Effects on Employees Under the Occupational Safety and Health Act in Taiwan
    Yu-Cheng Lin, Yu-Wen Lin
    Safety and Health at Work.2022; 13(4): 401.     CrossRef
  • Long Working Hours and Risk of Nonalcoholic Fatty Liver Disease: Korea National Health and Nutrition Examination Survey VII
    Eyun Song, Jung A. Kim, Eun Roh, Ji Hee Yu, Nam Hoon Kim, Hye Jin Yoo, Ji A. Seo, Sin Gon Kim, Nan Hee Kim, Sei Hyun Baik, Kyung Mook Choi
    Frontiers in Endocrinology.2021;[Epub]     CrossRef
  • The combined effect of long working hours and individual risk factors on cardiovascular disease: An interaction analysis
    Wanhyung Lee, Jongin Lee, Hyoung-Ryoul Kim, Yu Min Lee, Dong-Wook Lee, Mo-Yeol Kang
    Journal of Occupational Health.2021;[Epub]     CrossRef
  • The Contribution of Material, Behavioral, Psychological, and Social-Relational Factors to Income-Related Disparities in Cardiovascular Risk Among Older Adults
    Chiyoung Lee, Qing Yang, Eun-Ok Im, Eleanor Schildwachter McConnell, Sin-Ho Jung, Hyeoneui Kim
    Journal of Cardiovascular Nursing.2021; 36(4): E38.     CrossRef
  • The effect of exposure to long working hours on depression: A systematic review and meta-analysis from the WHO/ILO Joint Estimates of the Work-related Burden of Disease and Injury
    Reiner Rugulies, Kathrine Sørensen, Cristina Di Tecco, Michela Bonafede, Bruna M. Rondinone, Seoyeon Ahn, Emiko Ando, Jose Luis Ayuso-Mateos, Maria Cabello, Alexis Descatha, Nico Dragano, Quentin Durand-Moreau, Hisashi Eguchi, Junling Gao, Lode Godderis,
    Environment International.2021; 155: 106629.     CrossRef
  • Occupations Associated With Poor Cardiovascular Health in Women
    Bede N. Nriagu, Ako A. Ako, Conglong Wang, Anneclaire J. De Roos, Robert Wallace, Matthew A. Allison, Rebecca A. Seguin, Yvonne L. Michael
    Journal of Occupational & Environmental Medicine.2021; 63(5): 387.     CrossRef
  • Maternal working hours and smoking and drinking in adolescent children: based on the Korean National Health and Nutrition Examination Survey VI and VII
    Tae-Hwi Park, Yong-Duk Ahn, Jeong-Bae Rhie
    Annals of Occupational and Environmental Medicine.2021;[Epub]     CrossRef
  • The interplay of sleep duration, working hours, and obesity in Korean male workers: The 2010–2015 Korea National Health and Nutrition Examination Survey
    Mi-Jung Eum, Hye-Sun Jung, Leng Huat Foo
    PLOS ONE.2021; 16(3): e0247746.     CrossRef
  • Effect of Long Working Hours on Cardiovascular Disease in South Korean Workers: A Longitudinal Study
    Soojung Kim, Youn Jung
    Asia Pacific Journal of Public Health.2021; 33(2-3): 213.     CrossRef
  • Association between Occupational Characteristics and Overweight and Obesity among Working Korean Women: The 2010–2015 Korea National Health and Nutrition Examination Survey
    Mi-Jung Eum, Hye-Sun Jung
    International Journal of Environmental Research and Public Health.2020; 17(5): 1585.     CrossRef
  • A 10-year trend in income disparity of cardiovascular health among older adults in South Korea
    Chiyoung Lee, Qing Yang, Eun-Ok Im, Eleanor Schildwachter McConnell, Sin-Ho Jung, Hyeoneui Kim
    SSM - Population Health.2020; 12: 100682.     CrossRef
  • Socioeconomic and demographic predictors of high blood pressure, diabetes, asthma and heart disease among adults engaged in various occupations: evidence from India
    Sunita Patel, Usha Ram, Faujdar Ram, Surendra Kumar Patel
    Journal of Biosocial Science.2020; 52(5): 629.     CrossRef
  • Exploring Public Awareness of Overwork Prevention With Big Data From Google Trends: Retrospective Analysis
    Ro-Ting Lin, Yawen Cheng, Yan-Cheng Jiang
    Journal of Medical Internet Research.2020; 22(6): e18181.     CrossRef
  • WHO/ILO work-related burden of disease and injury: Protocol for systematic reviews of exposure to long working hours and of the effect of exposure to long working hours on depression
    Reiner Rugulies, Emiko Ando, Jose Luis Ayuso-Mateos, Michela Bonafede, Maria Cabello, Cristina Di Tecco, Nico Dragano, Quentin Durand-Moreau, Hisashi Eguchi, Junling Gao, Anne H. Garde, Sergio Iavicoli, Ivan D. Ivanov, Nancy Leppink, Ida E.H. Madsen, Fran
    Environment International.2019; 125: 515.     CrossRef
  • The Impact of Working Hours on Cardiovascular Diseases and Moderating Effects of Sex and Type of Work
    Wanhyung Lee, Young Joong Kang, Taeshik Kim, Jaesung Choi, Mo-Yeol Kang
    Journal of Occupational & Environmental Medicine.2019; 61(6): e247.     CrossRef
  • Long working hours and stroke among employees in the general workforce of Denmark
    Harald Hannerz, Karen Albertsen, Hermann Burr, Martin Lindhardt Nielsen, Anne Helene Garde, Ann Dyreborg Larsen, Jan Hyld Pejtersen
    Scandinavian Journal of Public Health.2018; 46(3): 368.     CrossRef
  • Cardiovascular disease risk differences between bus company employees and general workers according to the Korean National Health Insurance Data
    Ji-Hoo Yook, Dong-Wook Lee, Min-Seok Kim, Yun-Chul Hong
    Annals of Occupational and Environmental Medicine.2018;[Epub]     CrossRef
  • The Change of Self-Rated Health According to Working Hours for Two Years by Gender
    Jia Ryu, Yeogyeong Yoon, Hyunjoo Kim, Chung won Kang, Kyunghee Jung-Choi
    International Journal of Environmental Research and Public Health.2018; 15(9): 1984.     CrossRef
  • Long weekly working hours and ischaemic heart disease: a follow-up study among 145 861 randomly selected workers in Denmark
    Harald Hannerz, Ann Dyreborg Larsen, Anne Helene Garde
    BMJ Open.2018; 8(6): e019807.     CrossRef
  • Working hours and all-cause mortality in relation to the EU Working Time Directive: a Danish cohort study
    Harald Hannerz, Helle Soll-Johanning
    European Journal of Public Health.2018; 28(5): 810.     CrossRef
  • Study on association of working hours and occupational physical activity with the occurrence of coronary heart disease in a Chinese population
    Yao Ma, Ying-Jun Wang, Bing-Rui Chen, Hao-Jie Shi, Hao Wang, Mohammad Reeaze Khurwolah, Ya-Fei Li, Zhi-Yong Xie, Yang Yang, Lian-Sheng Wang, Carmine Pizzi
    PLOS ONE.2017; 12(10): e0185598.     CrossRef
  • 222 View
  • 3 Download
  • 27 Web of Science
  • 24 Crossref
Close layer
Research Article
The association between long working hours and hearing impairment in noise unexposed workers: data from the 5th Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012)
Jung-Woo Park, Jin-Soo Park, Seyoung Kim, Minkyu Park, Hyunrim Choi, Sinye Lim
Ann Occup Environ Med 2016;28:55.   Published online October 6, 2016
DOI: https://doi.org/10.1186/s40557-016-0140-1
AbstractAbstract PDFPubReaderePub
Background

This study is aimed at finding out the relationship between long working hours, one of major job stress elements, and hearing impairment in unexposed workers to occupational and environmental noise.

Methods

This study was performed on 1628 regular, full-time wage workers between the age of 25-64 who indicated in the survey of having no experience of exposure to noise, normal otoscopic findings, and not suffering from diabetes based on the data from the fifth Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012). The average working hours per week was categorized into 40 h and lower group, more than 40 to 48 h group, more than 48 to 60 h group, and more than 60 h group. The groups were defined as suffering from low or high frequencies hearing impairment if the average hearing threshold for 0.5, 1, 2 kHz or 3, 4, 6 kHz in both ears exceeds 25 dB based on the pure tone audiometry. The association between average weekly working hours and hearing impairment was analyzed using logistic regression after gender stratification.

Results

The prevalences of low and high frequencies hearing impairment in male workers were 4.3 and 28.6 %, respectively, which were much higher than female’s prevalence of 2.7 and 11.1 %. For male workers, no significant association was found between average weekly working hours and low and high frequencies hearing impairment. For female workers, odds ratios (OR) of low and high frequencies hearing impairment were 4.22 (95 % confidence interval (CI) 1.09–16.27) and 4.49 (95 % CI 1.73–11.67), respectively, after controlling for several related factors, such as, age, Body Mass Index (BMI), socio-economic status, health-related behavioral, and occupational characteristics variables, in the final model in the group working more than 60 h compared to the group working 40 h and lower. In addition, a dose-response relationship was observed that ORs of low and high frequencies hearing impairment were increased according to increasing average weekly working hours.

Conclusions

The association between long working hours and hearing impairment in both low and high frequencies was significant in Korean female workers with a dose-response relationship. Therefore, the law to change the culture of long working hours should be enacted in order to protect the workers’ health and improve the quality of life in Korean workers.


Citations

Citations to this article as recorded by  
  • Evaluation of the effect of Nigella sativa oil on the outcome of missed abortion in women: A randomized double‐blind clinical trial
    Belgheis Mohammadi, Leila Nazari Robati, Zeinab Tavakol, Mina Movahhed
    Health Science Reports.2024;[Epub]     CrossRef
  • Characteristics of Auditory Brainstem Response in Night-shift Health Workers
    Samir Kumar Singh, Poonam Jyoti Rana, Anita Gupta, Dibyodyuti Samaddar, Hanjabam Barun Sharma
    Annals of Neurosciences.2024;[Epub]     CrossRef
  • Hearing Impairment and Allostatic Load in Older Adults
    Eric Y. Du, Kening Jiang, Michelle C. Carlson, Nicholas S. Reed, Jennifer A. Deal
    JAMA Otolaryngology–Head & Neck Surgery.2023; 149(7): 597.     CrossRef
  • Association Between Long Working Hours and Chronic Kidney Disease According to Diabetic Status
    Ki Duk Kim, Suk-Yong Jang
    Journal of Occupational & Environmental Medicine.2022; 64(3): 190.     CrossRef
  • Long working hours are associated with a higher risk of non-alcoholic fatty liver disease: A large population-based Korean cohort study
    Yesung Lee, Eunchan Mun, Soyoung Park, Woncheol Lee, Jee-Fu Huang
    PLOS ONE.2021; 16(7): e0255118.     CrossRef
  • Can listening-related fatigue influence well-being? Examining associations between hearing loss, fatigue, activity levels and well-being
    Jack A. Holman, Benjamin W. Y. Hornsby, Fred H. Bess, Graham Naylor
    International Journal of Audiology.2021; 60(sup2): 47.     CrossRef
  • Occupational Differences in C-Reactive Protein Among Working-Age Adults in South Korea
    Yongjoo Kim, Masayoshi Zaitsu, Kanami Tsuno, Xiaoyu Li, Sunmin Lee, Soong-nang Jang, Ichiro Kawachi
    Journal of Occupational & Environmental Medicine.2020; 62(3): 194.     CrossRef
  • Audiometric notch for the prediction of early occupational hearing loss and its association with the interleukin-1beta genotype
    Nagat M. Amer, Mona M. Taha, Khadiga S. Ibrahim, Heba M. Abdallah, Eman M. El Tahlawy
    Journal of Taibah University Medical Sciences.2019; 14(3): 289.     CrossRef
  • Long working hours are associated with unmet dental needs in south Korean male adults who have experienced dental pain
    Yitak Kim, Sangwon Lee, Juyeong Kim, Eun-Cheol Park, Sung-In Jang
    BMC Oral Health.2019;[Epub]     CrossRef
  • Severe hearing impairment and risk of depression: A national cohort study
    So Young Kim, Hyung-Jong Kim, Eun-Kyu Park, Jiwon Joe, Songyong Sim, Hyo Geun Choi, Manuel S. Malmierca
    PLOS ONE.2017; 12(6): e0179973.     CrossRef
  • 154 View
  • 2 Download
  • 5 Web of Science
  • 10 Crossref
Close layer
Research Article
Long working hours and overweight and obesity in working adults
Byung-Mi Kim, Bo-Eun Lee, Hye-Sook Park, Young-Ju Kim, Young-Ju Suh, Jeong-youn Kim, Ji-Young Shin, Eun-Hee Ha
Ann Occup Environ Med 2016;28:36.   Published online August 22, 2016
DOI: https://doi.org/10.1186/s40557-016-0110-7
AbstractAbstract PDFPubReaderePub
Background

Previous studies have identified a link between gender and the various risk factors associated with obesity. We examined obesity risk factors in working adults to identify the effects of differences in body mass index (BMI) and percentage body fat (PBF) between women and men.

Methods

A total of 1,120 adults agreed to participate in the study. Data from 711 participants, including 411 women and 300 men, were analyzed. Multiple logistic regression analysis was used to estimate the effects of risk factors on obesity and being overweight. In addition, the least-squares (LS) means of both BMI and PBF were estimated by analysis of covariance (ANCOVA) in a generalized linear model. 

Results

Increases in BMI and PBF were significantly related to an age > 50 years and long working hours in women after compensating for confounding factors. Using the PBF criterion, the odds ratio (OR) of being overweight or obese in women > 50 years of age who worked for > 9 h a day was 3.9 (95% confidence interval [CI], 1.05–11.00). For BMI, women who were > 50 years of age and worked for > 9 h a day were 3.82 times (95% CI, 1.31–11.14) more likely to be overweight or obese than those who were < 50 years of age and worked for < 9 h a day.

Conclusion

Obesity in working adults was associated with > 50 years of age and long working hours in women. Further studies are needed to investigate the underlying mechanisms of this relationship and its potential implications for the prevention and management of excess weight and obesity.


Citations

Citations to this article as recorded by  
  • Relationship between consumption of high fat, sugar or sodium (HFSS) food and obesity and non-communicable diseases
    Sasinee Thapsuwan, Sirinya Phulkerd, Aphichat Chamratrithirong, Rossarin Soottipong Gray, Nongnuch Jindarattanaporn, Nutnicha Loyfah, Natjera Thongcharoenchupong, Umaporn Pattaravanich
    BMJ Nutrition, Prevention & Health.2024; 7(1): 78.     CrossRef
  • Fenugreek (Trigonella foenum-graecum L.) Modulates Energy Metabolism and Anti-inflammatory Response in Obesity via Combinatorial Analysis
    Fong Fong Liew, Theysshana Visuvanathan, Shalini Vellasamy
    The Natural Products Journal.2023;[Epub]     CrossRef
  • The association between long working hours and obstructive sleep apnea assessed by STOP-BANG score: a cross-sectional study
    Dong-Wook Lee, Jongin Lee
    International Archives of Occupational and Environmental Health.2023; 96(2): 191.     CrossRef
  • The social determinants of health influencing obesity for the aged in the Pakpoon community context: A qualitative study
    Pornchanuch Chumpunuch, Urai Jaraeprapal
    International Journal of Nursing Sciences.2022; 9(2): 211.     CrossRef
  • You Can’t Avoid Shift Work? Then Focus on Body Fat Rather than Weight
    Eun Kyung Lee
    Endocrinology and Metabolism.2022; 37(5): 756.     CrossRef
  • Maternal working hours and smoking and drinking in adolescent children: based on the Korean National Health and Nutrition Examination Survey VI and VII
    Tae-Hwi Park, Yong-Duk Ahn, Jeong-Bae Rhie
    Annals of Occupational and Environmental Medicine.2021;[Epub]     CrossRef
  • Long working hours are associated with a higher risk of non-alcoholic fatty liver disease: A large population-based Korean cohort study
    Yesung Lee, Eunchan Mun, Soyoung Park, Woncheol Lee, Jee-Fu Huang
    PLOS ONE.2021; 16(7): e0255118.     CrossRef
  • Long Working Hours and Risk of Nonalcoholic Fatty Liver Disease: Korea National Health and Nutrition Examination Survey VII
    Eyun Song, Jung A. Kim, Eun Roh, Ji Hee Yu, Nam Hoon Kim, Hye Jin Yoo, Ji A. Seo, Sin Gon Kim, Nan Hee Kim, Sei Hyun Baik, Kyung Mook Choi
    Frontiers in Endocrinology.2021;[Epub]     CrossRef
  • The causes of obesity: an in-depth review
    Tahir Omer
    Advances in Obesity, Weight Management & Control.2020; 10(4): 90.     CrossRef
  • Association between Occupational Characteristics and Overweight and Obesity among Working Korean Women: The 2010–2015 Korea National Health and Nutrition Examination Survey
    Mi-Jung Eum, Hye-Sun Jung
    International Journal of Environmental Research and Public Health.2020; 17(5): 1585.     CrossRef
  • Factors Associated with the Nutritional Status among Male Workers of Iron and Steel Industries in Bara District, Nepal
    Raj Kumar Sangroula, Hari Prasad Subedi, Kalpana Tiwari
    Journal of Nutrition and Metabolism.2020; 2020: 1.     CrossRef
  • Obesity Fact Sheet in Korea, 2019: Prevalence of Obesity and Abdominal Obesity from 2009 to 2018 and Social Factors
    Ga Eun Nam, Yang-Hyun Kim, Kyungdo Han, Jin-Hyung Jung, Eun-Jung Rhee, Seong-Su Lee, Dae Jung Kim, Kwan-Woo Lee, Won-Young Lee
    Journal of Obesity & Metabolic Syndrome.2020; 29(2): 124.     CrossRef
  • Gender differences and occupational factors for the risk of obesity in the Italian working population
    C. Di Tecco, L. Fontana, G. Adamo, M. Petyx, S. Iavicoli
    BMC Public Health.2020;[Epub]     CrossRef
  • Long working hours, anthropometry, lung function, blood pressure and blood-based biomarkers: cross-sectional findings from the CONSTANCES study
    Marianna Virtanen, Linda Magnusson Hansson, Marcel Goldberg, Marie Zins, Sari Stenholm, Jussi Vahtera, Hugo Westerlund, Mika Kivimäki
    Journal of Epidemiology and Community Health.2019; 73(2): 130.     CrossRef
  • Physical fitness, musculoskeletal disorders and body mass index in transport drivers from Barranquilla, Colombia
    Martha Mendinueta-Martínez, Yaneth Herazo-Beltrán, José Vidarte-Claros, Estela Crissien-Quiroz, Roberto Rebolledo-Cobos
    Revista de la Facultad de Medicina.2019; 67(4): 407.     CrossRef
  • Auswirkungen verkürzter Ruhezeiten auf Gesundheit und Work-Life-Balance bei Vollzeitbeschäftigten: Ergebnisse der BAuA-Arbeitszeitbefragung 2017
    Nils Backhaus, Corinna Brauner, Anita Tisch
    Zeitschrift für Arbeitswissenschaft.2019; 73(4): 394.     CrossRef
  • Evaluation for Fatigue and Accident Risk of Korean Commercial Bus Drivers
    Hogil Kim, Tae-Won Jang, Hyoung-Ryoul Kim, Seyoung Lee
    The Tohoku Journal of Experimental Medicine.2018; 246(3): 191.     CrossRef
  • 208 View
  • 3 Download
  • 17 Web of Science
  • 17 Crossref
Close layer
Research Article
The association between long working hours and the metabolic syndrome: evidences from the 5th Korean National Health and Nutrition Examination Survey of 2010 and 2012
Jae Uk Jeong, Man Joong Jeon, Joon Sakong
Ann Occup Environ Med 2014;26:53.   Published online December 21, 2014
DOI: https://doi.org/10.1186/s40557-014-0053-9
AbstractAbstract PDFPubReaderePub
Objectives

This study was conducted in order to evaluate the association between the working hours of Korean employees and the metabolic syndrome and the effects of long working hours on metabolic syndrome based on the 5th Korean National Health and Nutrition Examination Survey (2010-2012).

Methods

Based on the 5th Korean National Health and Nutrition Examination Survey (2010-2012), 4,456 Korean employees without shift work, aged over 15, who work 30 hours or more per week were targeted in this study. The association between the general characteristics, including age, smoking, alcohol drinking, exercise, and the metabolic syndrome criteria defined by International Diabetes Federation (IDF) and weekly working hours were analyzed. In addition, the association between weekly working hours and the metabolic syndrome of the subjects stratified by gender was analyzed through multiple logistic regression analyses and generalized linear mixed model after adjusting the general characteristics.

Results

In the results of stratified analysis by gender, in male subjects, in comparison with the 30-39 weekly working hours group, there were no significant adjusted odds ratios to the other working hours groups. In female subjects, in comparison with the 30-39 weekly working hours group, there were no significant adjusted odds ratios to the other working hours groups. In addition, no trend associations were observed among weekly working hour groups in both stratified genders.

Conclusion

No significant differences in prevalence of metabolic syndrome of the subjects stratified by gender were found according to weekly increasing working hours. However, due to some limitations of this study, further prospective studies may be necessary for verification.


Citations

Citations to this article as recorded by  
  • Impact of Reduced Working Hours and Night Work Hours on Metabolic Syndrome: A Quasi-Experimental Study
    Hye-Eun Lee, Ichiro Kawachi
    Safety and Health at Work.2023; 14(1): 59.     CrossRef
  • Association between shift work or long working hours with metabolic syndrome: a systematic review and dose–response meta-analysis of observational studies
    Yihui Wang, Li Yu, Yinyan Gao, Lili Jiang, Lin Yuan, Pengju Wang, Yanwen Cao, Xuping Song, Long Ge, Guowu Ding
    Chronobiology International.2021; 38(3): 318.     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
  • Efficacy of high dose vitamin D supplementation in improving serum 25-hydroxyvitamin D among laboratory personnel working at the Nepal National Center for Rheumatic Diseases
    Mohan Giri, Bibhuti Upreti, Rakshya Joshi, Jayanti Rai, Binit Vaidya
    Biomedical Reports.2017;[Epub]     CrossRef
  • Short sleep duration, shift work, and actual days taken off work are predictive life-style risk factors for new-onset metabolic syndrome: a seven-year cohort study of 40,000 male workers
    Osamu Itani, Yoshitaka Kaneita, Mikiko Tokiya, Maki Jike, Atsushi Murata, Sachi Nakagome, Yuichiro Otsuka, Takashi Ohida
    Sleep Medicine.2017; 39: 87.     CrossRef
  • The association between long working hours and metabolic syndrome remains elusive
    Adriano M. Pimenta, Miguel A. Martinez-Gonzalez
    The European Journal of Public Health.2016; 26(3): 377.     CrossRef
  • 199 View
  • 1 Download
  • 4 Web of Science
  • 6 Crossref
Close layer
Research Article
Association between long working hours and serum gamma-glutamyltransferase levels in female workers: data from the fifth Korean National Health and Nutrition Examination Survey (2010-2011)
Seung-Gwon Park, Yong-Jin Lee, Jung-Oh Ham, Eun-Chul Jang, Seong-Woo Kim, Hyun Park
Ann Occup Environ Med 2014;26:40.   Published online December 1, 2014
DOI: https://doi.org/10.1186/s40557-014-0040-1
AbstractAbstract PDFPubReaderePub
Objectives

The present study investigated the association between long working hours and serum gamma-glutamyltransferase (GGT) levels, a factor influencing the incidence of cardiovascular disease.

Methods

Data from the fifth Korean National Health and Nutrition Examination Survey (2010–2011) were used to analyze 1,809 women. Subjects were divided into three groups based on the number of weekly working hours: ≤29, 30–51, and ≥52 hours per week. Complex samples logistic regression was performed after adjusting for general and occupational factors to determine the association between long working hours and high serum GGT levels.

Results

The prevalence of high serum GGT levels in groups with ≤29, 30–51, and ≥52 working hours per week was 22.0%, 16.9%, and 26.6%, respectively. Even after adjusting for general and occupational factors, those working 30–51 hours per week had the lowest prevalence of high serum GGT levels. Compared to those working 30–51 hours per week, the odds ratios (OR) of having high serum GGT levels in the groups with ≥52 and ≤29 working hours per week were 1.56 (95% confidence interval [CI], 1.10–2.23) and 1.53 (95% CI, 1.05–2.24), respectively.

Conclusions

Long working hours were significantly associated with high serum GGT levels in Korean women.


Citations

Citations to this article as recorded by  
  • Multi-ancestry sleep-by-SNP interaction analysis in 126,926 individuals reveals lipid loci stratified by sleep duration
    Raymond Noordam, Maxime M. Bos, Heming Wang, Thomas W. Winkler, Amy R. Bentley, Tuomas O. Kilpeläinen, Paul S. de Vries, Yun Ju Sung, Karen Schwander, Brian E. Cade, Alisa Manning, Hugues Aschard, Michael R. Brown, Han Chen, Nora Franceschini, Solomon K.
    Nature Communications.2019;[Epub]     CrossRef
  • 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
    Annals of Occupational and Environmental Medicine.2019;[Epub]     CrossRef
  • 172 View
  • 0 Download
  • 3 Web of Science
  • 2 Crossref
Close layer
Research Article
Effect of Long Working Hours on Self-reported Hypertension among Middle-aged and Older Wage Workers
Dong Hyun Yoo, Mo-yeol Kang, Domyung Paek, Bokki Min, Sung-il Cho
Ann Occup Environ Med 2014;26:25-25.   Published online September 3, 2014
DOI: https://doi.org/10.1186/s40557-014-0025-0
AbstractAbstract PDFPubReaderePub
Objectives

Many studies have reported an association between overwork and hypertension. However, research on the health effects of long working hours has yielded inconclusive results. The objective of this study was to identify an association between overtime work and hypertension in wage workers 45 years and over of age using prospective data.

Methods

Wage workers in Korea aged 45 years and over were selected for inclusion in this study from among 10,254 subjects from the Korean Longitudinal Study of Ageing. Workers with baseline hypertension and those with other major diseases were excluded. In the end, a total of 1,079 subjects were included. A Cox proportional hazards model was used to calculate hazard ratios and adjust for baseline characteristics such as sex, age, education, income, occupation, form of employment, body mass index, alcohol habit, smoking habit, regular exercise, and number of working days per week. Additional models were used to calculate hazard ratios after gender stratification.

Results

Among the 1,079 subjects, 85 workers were diagnosed with hypertension during 3974.2 person-months. The average number of working hours per week for all subjects was 47.68. The proportion of overtime workers was 61.0% (cutoff, 40 h per week). Compared with those working 40 h and less per week, the hazard ratio of subjects in the final model, which adjusted for all selected variables, working 41-50 h per week was 2.20 (95% confidence interval [CI], 1.19–4.06), that of subjects working 51-60 h per week was 2.40 (95% CI, 1.07–5.39), and that of subjects working 61 h and over per week was 2.87 (95% CI, 1.33–6.20). In gender stratification models, the hazard ratio of the females tended to be higher than that of the males.

Conclusion

As the number of working hours per week increased, the hazard ratio for diagnosis of hypertension significantly increased. This result suggests a positive association between overtime work and the risk of hypertension.


Citations

Citations to this article as recorded by  
  • Systematic review and meta-analysis of the association between long working hours and hypertension risk
    Joonho Ahn, Ji-Hun Song, In-Soo Shin, In Young Cho, Mo-Yeol Kang
    Journal of Epidemiology and Community Health.2024; 78(6): 367.     CrossRef
  • Risk prediction model of self-reported hypertension for telemedicine based on the sociodemographic, occupational and health-related characteristics of seafarers: a cross-sectional epidemiological study
    Getu Gamo Sagaro, Ulrico Angeloni, Gopi Battineni, Nalini Chintalapudi, Marzio Dicanio, Mihiretu M Kebede, Claudia Marotta, Giovanni Rezza, Andrea Silenzi, Francesco Amenta
    BMJ Open.2023; 13(10): e070146.     CrossRef
  • Unveiling the Global Surge: Unraveling the Factors Fueling the Spread of Karoshi Syndrome
    Haitham Al-Madhagi
    Risk Management and Healthcare Policy.2023; Volume 16: 2779.     CrossRef
  • Long working hours associated with elevated ambulatory blood pressure among female and male white-collar workers over a 2.5-year follow-up
    Mahée Gilbert-Ouimet, Xavier Trudel, Denis Talbot, Michel Vézina, Alain Milot, Chantal Brisson
    Journal of Human Hypertension.2022; 36(2): 207.     CrossRef
  • Occupational risk factors for hypertension
    Mo-Yeol Kang
    Journal of Hypertension.2022; 40(11): 2102.     CrossRef
  • The combined effect of long working hours and individual risk factors on cardiovascular disease: An interaction analysis
    Wanhyung Lee, Jongin Lee, Hyoung-Ryoul Kim, Yu Min Lee, Dong-Wook Lee, Mo-Yeol Kang
    Journal of Occupational Health.2021;[Epub]     CrossRef
  • Dose–response relationship between working hours and hypertension
    Hao Cheng, Xuan Gu, Zhenan He, Yanqiu Yang
    Medicine.2021; 100(16): e25629.     CrossRef
  • Occupational Physical Activity and New-Onset Hypertension: A Nationwide Cohort Study in China
    Qinqin Li, Rui Li, Shaojie Zhang, Yuanyuan Zhang, Panpan He, Zhuxian Zhang, Mengyi Liu, Chun Zhou, Huan Li, Chengzhang Liu, Xianhui Qin
    Hypertension.2021; 78(1): 220.     CrossRef
  • Working hours are closely associated with depressive mood and suicidal ideation in Korean adults: a nationwide cross-sectional study
    Sangsoo Han, Yujin Ko, Ji Eun Moon, Young Soon Cho
    Scientific Reports.2021;[Epub]     CrossRef
  • The negative impact of long working hours on mental health in young Korean workers
    Sungjin Park, Hyungdon Kook, Hongdeok Seok, Jae Hyoung Lee, Daeun Lim, Dong-Hyuk Cho, Suk-Kyu Oh, Sergio A. Useche
    PLOS ONE.2020; 15(8): e0236931.     CrossRef
  • Cross-sectional association between long working hours and liver function: the Kangbuk Samsung Health Study
    Eunchan Mun, Woncheol Lee, Min-Woo Nam, Hyun-Il Kim, Hyeongcheol Kim, Yesung Lee, Soyoung Park
    BMJ Open.2020; 10(12): e041595.     CrossRef
  • Excessive work hours and hypertension: Evidence from the NIOSH survey data
    Takahiko Kudo, Michael H. Belzer
    Safety Science.2020; 129: 104813.     CrossRef
  • Long Working Hours and the Prevalence of Masked and Sustained Hypertension
    Xavier Trudel, Chantal Brisson, Mahée Gilbert-Ouimet, Michel Vézina, Denis Talbot, Alain Milot
    Hypertension.2020; 75(2): 532.     CrossRef
  • Long work hours and decreased glomerular filtration rate in the Korean working population
    Dong-wook Lee, Jongin Lee, Hyoung-Ryoul Kim, Kyo Yeon Jun, Mo-Yeol Kang
    Occupational and Environmental Medicine.2020; 77(10): 699.     CrossRef
  • Long working hours, anthropometry, lung function, blood pressure and blood-based biomarkers: cross-sectional findings from the CONSTANCES study
    Marianna Virtanen, Linda Magnusson Hansson, Marcel Goldberg, Marie Zins, Sari Stenholm, Jussi Vahtera, Hugo Westerlund, Mika Kivimäki
    Journal of Epidemiology and Community Health.2019; 73(2): 130.     CrossRef
  • Working Hours and Risk of Acute Myocardial Infarction and Stroke Among Middle-Aged Japanese Men ― The Japan Public Health Center-Based Prospective Study Cohort II ―
    Rie Hayashi, Hiroyasu Iso, Kazumasa Yamagishi, Hiroshi Yatsuya, Isao Saito, Yoshihiro Kokubo, Ehab S. Eshak, Norie Sawada, Shoichiro Tsugane
    Circulation Journal.2019; 83(5): 1072.     CrossRef
  • Long weekly working hours and ischaemic heart disease: a follow-up study among 145 861 randomly selected workers in Denmark
    Harald Hannerz, Ann Dyreborg Larsen, Anne Helene Garde
    BMJ Open.2018; 8(6): e019807.     CrossRef
  • Long Working Hours and Risk of Cardiovascular Disease
    Marianna Virtanen, Mika Kivimäki
    Current Cardiology Reports.2018;[Epub]     CrossRef
  • Clinical significance of stress-related increase in blood pressure: current evidence in office and out-of-office settings
    Masanori Munakata
    Hypertension Research.2018; 41(8): 553.     CrossRef
  • Secular trends in salt and soy sauce intake among Chinese adults, 1997–2011
    Lianlong Yu, Suyun Li, Jinshan Zhao, Junli Zhang, Liansen Wang, Kebo Wang
    International Journal of Food Sciences and Nutrition.2018; 69(2): 215.     CrossRef
  • The Association Between Long Working Hours and High-Sensitivity C-Reactive Protein in Older Aged Individuals
    Jongin Lee, Hyoung-Ryoul Kim
    Journal of Occupational & Environmental Medicine.2018; 60(9): 775.     CrossRef
  • “Back Home, People Say America is Heaven”: Pre-Migration Expectations and Post-Migration Adjustment for Liberians in Pittsburgh
    Yolanda Covington-Ward
    Journal of International Migration and Integration.2017; 18(4): 1013.     CrossRef
  • Occupational Disparities in the Association between Self-Reported Salt-Eating Habit and Hypertension in Older Adults in Xiamen, China
    Manqiong Yuan, Wei Chen, Bogang Teng, Ya Fang
    International Journal of Environmental Research and Public Health.2016; 13(1): 148.     CrossRef
  • The association between long working hours and hearing impairment in noise unexposed workers: data from the 5th Korea National Health and Nutrition Examination Survey (KNHANES 2010–2012)
    Jung-Woo Park, Jin-Soo Park, Seyoung Kim, Minkyu Park, Hyunrim Choi, Sinye Lim
    Annals of Occupational and Environmental Medicine.2016;[Epub]     CrossRef
  • Dose–Response Relation Between Work Hours and Cardiovascular Disease Risk
    Sadie H. Conway, Lisa A. Pompeii, Robert E. Roberts, Jack L. Follis, David Gimeno
    Journal of Occupational & Environmental Medicine.2016; 58(3): 221.     CrossRef
  • Association of Work-related Characteristics and Hypertension among White Collar Workers
    Chae-Bong Kim, KyooSang Kim
    Journal of Korean Society of Occupational and Environmental Hygiene.2015; 25(3): 418.     CrossRef
  • 239 View
  • 2 Download
  • 32 Web of Science
  • 26 Crossref
Close layer
Research Article
The Association between Long Working Hours and Self-Rated Health
Jun-Taek Song, Goeun Lee, Jongho Kwon, Jung-Woo Park, Hyunrim Choi, Sinye Lim
Ann Occup Environ Med 2014;26:2-2.   Published online January 20, 2014
DOI: https://doi.org/10.1186/2052-4374-26-2
AbstractAbstract PDFPubReaderePub
Objectives

This study was conducted to determine the number of hours worked per week by full-time wage workers by using the data of the Korean Labor and Income Panel Study (KLIPS), which represents the domestic urban area household, and to determine the association between weekly working hours and the level of self-rated health.

Methods

We used data from the 11th KLIPS conducted in 2008. The subjects of this study were 3,699 full-time wage workers between the ages of 25 and 64 years. The association between weekly working hours and self-rated health was analyzed considering socio-demographic characteristics, work environment, and health-related behaviors.

Results

Among the workers, 29.7% worked less than 40 hours per week; 39.7%, more than 40 to 52 hours; 19.7%, more than 52 to 60 hours; and 10.9%, more than 60 hours per week. After controlling for socio-demographic variables, work environment-related variables, and health-related behavior variables, the odds ratio (OR) for poor self-rated health for the group working more than 40 hours and up to 52 hours was calculated to be 1.06 (95% confidence interval (CI), 0.89-1.27) when the group working less than 40 hours per week was considered the reference. The OR for the group working more than 60 hours was 1.42 (95% CI, 1.10-1.83) and that for the group working more than 52 hours and up to 60 hours was 1.07 (95% CI, 0.86-1.33). After stratification by gender and tenure, the OR of the female workers group and that of the group with a tenure of more than 1 year were found to be significantly higher than those of the other groups.

Conclusions

This study showed that workers working more than 60 hours per week have a significantly higher risk of poor self-rated health than workers working less than 40 hours per week. This effect was more obvious for the female workers group and the group with a tenure of more than 1 year. In the future, longitudinal studies may be needed to determine the association between long working hours and various health effects in Korean workers.


Citations

Citations to this article as recorded by  
  • Association between social jetlag and self-rated health: Evidence from Korean representative working population
    En-Joo Jung, Seong-Sik Cho, Hye-Eun Lee, Jeehee Min, Tae-Won Jang, Mo-Yeol Kang
    Sleep Medicine.2024; 114: 86.     CrossRef
  • Association between lone work and self-rated health status: using the 5th Korean Working Conditions Survey
    Eunseun Han, Ui-Jin Kim, Yongho Lee, Sanghyuk Lee, Seunghon Ham, Wanhyung Lee, Won-Jun Choi, Seong-Kyu Kang
    Annals of Occupational and Environmental Medicine.2023;[Epub]     CrossRef
  • Relationship between Job Burnout, Depressive Symptoms, and Career Choice Regret among Chinese Postgraduates of Stomatology
    Lu Yang, Li Yan, Xiaogang Zhong, Huiqing Long, Fangchun Chen, Xin Jin
    International Journal of Environmental Research and Public Health.2022; 19(23): 16042.     CrossRef
  • Understanding sport coaches’ turnover intention and well-being: an environmental psychology approach
    Heetae Cho, Ye Hoon Lee
    Psychology & Health.2022; 37(3): 375.     CrossRef
  • Poor worker’s long working hours paradox: evidence from the Korea National Health and Nutrition Examination Survey, 2013-2018
    Min Young Park, Jaeyoung Park, Jun-Pyo Myong, Hyoung-Ryoul Kim, Dong-Wook Lee, Mo-Yeol Kang
    Annals of Occupational and Environmental Medicine.2022;[Epub]     CrossRef
  • Work‐related factors on mental health among migrant factory workers in china: Application of the Demand‐Control and Effort‐Reward Imbalance Model
    Phoenix K. H. Mo, Yu Cheng, Joseph T. F. Lau
    Health & Social Care in the Community.2022; 30(2): 656.     CrossRef
  • The negative impact of long working hours on mental health in young Korean workers
    Sungjin Park, Hyungdon Kook, Hongdeok Seok, Jae Hyoung Lee, Daeun Lim, Dong-Hyuk Cho, Suk-Kyu Oh, Sergio A. Useche
    PLOS ONE.2020; 15(8): e0236931.     CrossRef
  • Association between Working Hours and Self-Rated Health
    Jongha Jeon, Wanhyung Lee, Won-Jun Choi, Seunghon Ham, Seong-Kyu Kang
    International Journal of Environmental Research and Public Health.2020; 17(8): 2736.     CrossRef
  • Autonomous Vehicles and Public Health
    David Rojas-Rueda, Mark J. Nieuwenhuijsen, Haneen Khreis, Howard Frumkin
    Annual Review of Public Health.2020; 41(1): 329.     CrossRef
  • Salaried Workers’ Self-Perceived Health and Psychosocial Risk in Guayaquil, Ecuador
    Antonio Ramón Gómez-García, Cecilia Alexandra Portalanza-Chavarría, Christian Arturo Arias-Ulloa, César Eduardo Espinoza-Samaniego
    International Journal of Environmental Research and Public Health.2020; 17(23): 9099.     CrossRef
  • Perceived spillover effects of club-based green space: Evidence from Beijing golf courses, China
    Wu Wenjie, Yiyi Chen, Liu Ye
    Urban Forestry & Urban Greening.2020; 48: 126518.     CrossRef
  • Long Working Hours and Poor Self-Rated Health in the Young Working Population in Korea
    Sungjin Park, Suk-kyu Oh, Hongdeok Seok, Sung-Kyung Kim, Jung Ran Choi, Sung-Soo Oh, Sang-Baek Koh
    Journal of Occupational & Environmental Medicine.2019; 61(6): e291.     CrossRef
  • Does Residents’ Satisfaction with the Neighbourhood Environment Relate to Residents’ Self-Rated Health? Evidence from Beijing
    Yiyi Chen, Mark Stephens, Colin A. Jones
    International Journal of Environmental Research and Public Health.2019; 16(24): 5051.     CrossRef
  • The Change of Self-Rated Health According to Working Hours for Two Years by Gender
    Jia Ryu, Yeogyeong Yoon, Hyunjoo Kim, Chung won Kang, Kyunghee Jung-Choi
    International Journal of Environmental Research and Public Health.2018; 15(9): 1984.     CrossRef
  • The Rise of Artificial Intelligence under the Lens of Sustainability
    Jayden Khakurel, Birgit Penzenstadler, Jari Porras, Antti Knutas, Wenlu Zhang
    Technologies.2018; 6(4): 100.     CrossRef
  • Effect of Work on Medical Expenditures by Elderly: Findings From the Korean Health Panel 2008–2013
    Min Kyung Hyun
    Safety and Health at Work.2018; 9(4): 462.     CrossRef
  • Working hours and health in nurses of public hospitals according to gender
    Juliana da Costa Fernandes, Luciana Fernandes Portela, Rosane Härter Griep, Lúcia Rotenberg
    Revista de Saúde Pública.2017;[Epub]     CrossRef
  • 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
    Annals of Occupational and Environmental Medicine.2016;[Epub]     CrossRef
  • Association between employment status and self-rated health: Korean working conditions survey
    Kimin Kwon, Jae Bum Park, Kyung-Jong Lee, Yoon-Sik Cho
    Annals of Occupational and Environmental Medicine.2016;[Epub]     CrossRef
  • Health Disparities among Korean Workers by Enterprise Size: Using Korean Labor and Income Panel Study (17th)
    Bohyun Park, Sook Ja Choi, Sukyong Seo
    Korean Journal of Occupational Health Nursing.2016; 25(4): 277.     CrossRef
  • Working hours and mental health in Australia: evidence from an Australian population-based cohort, 2001–2012
    Allison Milner, Peter Smith, A D LaMontagne
    Occupational and Environmental Medicine.2015; 72(8): 573.     CrossRef
  • Associations of a Short Sleep Duration, Insufficient Sleep, and Insomnia with Self-Rated Health among Nurses
    Aline Silva-Costa, Rosane Härter Griep, Lúcia Rotenberg, Christian Cajochen
    PLOS ONE.2015; 10(5): e0126844.     CrossRef
  • Working hours and self-rated health over 7 years: gender differences in a Korean longitudinal study
    Seong-Sik Cho, Myung Ki, Keun-Hoe Kim, Young-Su Ju, Domyung Paek, Wonyun Lee
    BMC Public Health.2015;[Epub]     CrossRef
  • Association between Long Working Hours and Depressive Symptoms among Interns and Residents in South Korea-2014 Korea Interns & Residents Survey
    Ji-Hwan Kim, Jaehong Yoon, Seung-Sup Kim
    Journal of Korean Society of Occupational and Environmental Hygiene.2015; 25(2): 236.     CrossRef
  • 172 View
  • 0 Download
  • 26 Web of Science
  • 24 Crossref
Close layer
Original Article
The relationship of working hours and work intensity with sleep disturbance among continuous 12 hours day and night shift workers in the automobile factory in Korea
Mia Son
Korean Journal of Occupational and Environmental Medicine 2004;16(1):13-24.   Published online March 31, 2004
DOI: https://doi.org/10.35371/kjoem.2004.16.1.13
AbstractAbstract PDF
BACKGROUND
S: The objective of this study is to explore the relationships of working hours and work intensity with sleep disturbance among 12-hour shift workers in the automobile factory in Korea.
METHODS
A questionnaire and a sleep diary were distributed among 2200 (25% of total workers) and 300 workers who were randomly selected in the 8700 workers in one car factory. Among the 300 randomely selected workers, who were randomly selected, 262 workers filled out a sleep diary. For a questionnaire, 2200 (25%) among 8700 workers were randomly selected, 1200 (54% response rate) of whom filled out the questionnaire. The cross-sectional questionnaire and the sleep diary during 14 consecutive days were distributed and collected by workers' representatives, who were trained for the participatory action research in this study. One hundred and sixty workers' sleep diaries and questionnaires were merged by the same worker and used for the analysis in this study. Logistic regression analysis for repeated measurements was modeled using the prevalence of severe sleepiness at work (i.e. Karonlinska Sleepiness Scale 7 or higher) as dependent variable and working hours, sleep pattern, work intensity and health behaviours as independent variables.
RESULTS
The prevalence of severe sleepiness at the end of work was more than 60% after finishing night shift in the automobile factory. The main risk factors related to the severe sleepiness at the end of work were the night shift, long working hours more than 10 hours, the higher frequency of night shift per month, less free time between shifts, poor quality of sleep, deficit of sleeping hours and intensified work (reducing tendency of rest time per day and increasing tendency of additional working time) such as increasing tendency of absolute surplus value.
DISCUSSION
We suggest that the 12-hour shift system, long working hours, intensified work and poor quantity as well as quality of sleep were the main risk factors for the severe sleepiness among the shift workers in the automobile factory in Korea.

Citations

Citations to this article as recorded by  
  • Effects of Labor Intensity and Fatigue on Sleep Quality of Clinical Nurses
    Mi Jin Seol, Byoung Sook Lee, Soo-Kyoung Lee
    Journal of Korean Academy of Nursing Administration.2018; 24(4): 276.     CrossRef
  • Factors related with quality on sleep of daytime workers
    Bu-il Kim, Seong-yong Yoon, Jin-seok Kim, Kuck-Hyeun Woo, Seong-yong Cho, Ho Lee, Jong-min An
    Annals of Occupational and Environmental Medicine.2018;[Epub]     CrossRef
  • 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
    Annals of Occupational and Environmental Medicine.2016;[Epub]     CrossRef
  • Fatigue and related factors among hotel workers: the effects of emotional labor and non-standard working hours
    Ju Jong Lee, Hyun Jey Moon, Kyung-Jae Lee, Joo Ja Kim
    Annals of Occupational and Environmental Medicine.2014;[Epub]     CrossRef
  • 88 View
  • 2 Download
  • 4 Crossref
Close layer

Ann Occup Environ Med : Annals of Occupational and Environmental Medicine
Close layer
TOP