Related Experiment Video
Updated: Feb 17, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
The Combined Effect of Long Working Hours and Low Job Control on Self-Rated Health: An Interaction Analysis
Seong-Sik Cho1, Young-Su Ju, Domyung Paek
1Department of Occupational and Environmental Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea (Drs Cho, Ju); Department of Occupational & Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Korea (Drs Cho, Paek); Department of Occupational & Environmental Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea (Dr Kim); and Department of Occupational and Environmental Medicine, Ewha Womans University School of Medicine, Seoul, Korea (Dr Jung-Choi).
Objectives:
The aim of this study was to investigate the combined effects of long working hours and low job control on self-rated health.
Methods:
We analyzed employees' data obtained from the third Korean Working Conditions Survey (KWCS). Multiple survey logistic analysis and postestimation commands were employed to estimate the relative excess risk due to interaction (RERI).
Results:
The odds ratio (OR) for poor self-rated health was 1.24 [95% confidence interval (95% CI): 1.13 to 1.35] for long working hours, 1.04 (95% CI: 0.97 to 1.13) for low job control, and 1.47 (95% CI: 1.33 to 1.62) for both long working hours and low job control. The RERI was 0.18 (95% CI: 0.02 to 0.34).
Conclusion:
These results imply that low job control may increase the negative influence of long working hours on self-rated health.
Related Concept Videos
Factors Affecting Illness
For instance, risk factors are connected to illness,...
Dimensions of Health and Illness
Stress Prevention and Stress Management Techniques IV
Stress and Mental Health
Individuals with depression often experience challenges in both their personal and professional...
Self-Regulation
Stress Prevention and Stress Management Techniques I
Conscientiousness
Conscientious individuals tend to be organized, responsible, and disciplined. They prioritize completing tasks and following structured routines,...

