The association of relational and organizational job stress factors with sleep disorder: analysis of the 3rd Korean working conditions survey (2011).
BACKGROUND
Sleep disorder is a disease that causes reduction in quality of life and work efficiency of workers. This study was performed to investigate the relationship between job-related stress factor and sleep disorder among wageworkers in Korea.


METHODS
This study was based on analysis of the 3rd Korean working conditions survey. We analyzed 35,902 workers whose employment status is wageworker. We classified the job-related stress factor into 12 sections. Logistic regression was performed to estimate the relationship between job-related stress factor and sleep disorder and Odds ratio and 95 % CI were calculated using the SPSS version 23.0 program.


RESULTS
Many categories of Job-related stress factor were correlated with sleep disorder (8 of 12 for women, 10 of 12 for men). The results of the regression analysis, corrected for general and occupational characteristics, indicated that sleep disorder was significantly correlated with the following categories of job-related stress: discrimination experience (OR 3.37, 95 % CI = 2.49 ~ 4.56 in women, OR 1.96, 95 % CI = 1.53 ~ 2.51 in men), direct customer confrontation (OR 2.72, 95 % CI = 1.91 ~ 3.86 in women, OR 1.99, 95 % CI = 1.45 ~ 2.72 in men), emotional stress (OR 2.01, 95 % CI = 1.30 ~ 3.09 in men), work dissatisfaction (detailed) (OR 1.99, 95 % CI = 1.36 ~ 2.93 in men), work dissatisfaction (overall) (OR 2.30, 95 % CI = 1.66 ~ 3.20 in women, OR 2.40, 95 % CI = 1.88 ~ 3.08 in men), expression of opinion difficulty (OR 0.66, 95 % CI = 0.48 ~ 0.92 in women, OR 0.57, 95 % CI = 0.45 ~ 0.73 in men).


CONCLUSIONS
A number of studies have reported that stress affects sleep disorder. In this study, many factors suspected to increase the risk of sleep disorder were added to previously known job stress factors. In particular, this study found a strong correlation between work-associated sleep disorder and relational and organizational job stress factors. Sleep disorder may lead to large decreases in workers' quality of life and work efficiency. Awareness and interventions are therefore required to reduce workplace stress; additional research of this topic is also required.
Department of Occupational and Environmental Medicine, Graduate School of Public Health, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-600 Republic of Korea.
Gyuree
G
Kim
Department of Occupational and Environmental Medicine, Graduate School of Public Health, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-600 Republic of Korea.
Bokki
B
Min
Department of Occupational and Environmental Medicine, Graduate School of Public Health, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-600 Republic of Korea.
Jaeyoup
J
Jung
Department of Occupational and Environmental Medicine, Graduate School of Public Health, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-600 Republic of Korea.
Domyung
D
Paek
Department of Occupational and Environmental Medicine, Graduate School of Public Health, Seoul National University, Gwanak-ro 1, Gwanak-gu, Seoul 151-600 Republic of Korea.
Sung-Il
SI
Cho
Job-related stress factor; KWCS; Sleep disorder