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Noh, Wang, Choi, Lim, Kim, Won, and Jung-Choi: The Effect of Shift Work on the Level of Self-Rated Health
Original Article

Korean Journal of Occupational and Environmental Medicine 2010; 22(3): 200-209.

Published online: 30 September 2010

DOI: https://doi.org/10.35371/kjoem.2010.22.3.200

The Effect of Shift Work on the Level of Self-Rated Health

Daehee Noh, Jong Ho Wang, Hyunrim Choi, Sinye Lim, Keunwhoe Kim1, Chang Won Won2, Kyunghee Jung-Choi3

Department of Occupational and Environmental Medicine, College of Medicine, Kyung Hee University, Korea.

1Department of Occupational and Environmental Medicine, Konkuk University Chungju Hospital, Korea.

2Department of Family Medicine, College of Medicine, Kyung Hee University, Korea.

3Department of Preventive Medicine, Ewha Women's University School of Medicine, Korea.

Corresponding author (jungchoikh@gmail.com)

Received 5 February 2010       Revised 14 July 2010       Accepted 19 July 2010

Copyright © 2010 The Korean Society of Occupational and Environmental Medicine

Abstract

Objectives

The present study was designed to determine the characteristics of shift work and the relationship between shift work and the level of self-rated health using the Korean Labor and Income Panel Study (KLIPS) data, which represents urban households in Korea.

Methods

Using the 9th wave of KLIPS, this study analyzed 2,087 male workers aged 25 to 64 years; participants missing data were excluded from analysis. To determine the impact of shift work on the level of self-rated health, logistic regression analysis was applied that controlled for socio-demographic characteristics, labor environment, and health-related behaviors.

Results

Shift workers comprised 13.4% of study subjects overall. The majority(69.2%) of participants were in 2-teams and in 2-shifts. Week 1 shift cycle changes were the highest, 56.3%. The risk of poor self-rated health was not significantly higher among shift workers compared to non-shift workers (OR=1.08, 95% CI=0.79~1.48). When divided by tenure, shift workers with more than 10-years experience (OR=1.79, 95% CI=0.91~3.50) tended to show greater risk than non-shift workers at marginal significance.

Conclusions

In the present study, a significantly higher risk of self-rated poor health among shift workers was not observed. However, shift workers with more than 10-years experience tended to show increased health risk compared to non-shift workers. Further studies are required to determine time-series data and to consider both healthy worker effect and information bias.

Keywords: Shift work, Self-rated health

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