Objective To examine the effect of occupational stress related factors on sleep disorder of locomotive drivers in Zhengzhou, so as to provide scientific evidence to improve their sleep quality.
Methods A total of 1 500 locomotive drivers registered to Zhengzhou Locomotive Depot, Zhengzhou Railway Bureau were selected and investigated on general information, sleep disorder(Sleep Disorder Questionnaire), effort-reward imbalance(ERI)(Effort-Reward Imbalance Questionnaire), and occupational stress related factors(Occupational Stress Inventory). Bounded by the ERI coefficient value of 1.0 or the average score of influencing factors for occupational stress, the participants were divided into high or low stress level group. The sleep disorder scores between two groups were compared by t test. The sleep disorder scores in association with different stress levels were assessed by multivariate step-wise regression analysis.
Results A total of 1 448 valid questionnaires were returned, and the valid return rate was 96.53%. All the study participants were male with a sleep disorder rate of 51.4%. The low level group versus the high level group reported lower scores of ERI, effort, negative emotion, depressive symptoms, and daily tension(all P<0.05) and higher scores of reward, positive emotion, self-esteem, supervisor support, peer support, social support, coping strategy, control strategy, support strategy, and job satisfaction(all P<0.05). The results of multivariate step-wise regression analysis showed that depressive symptoms, effort, and daily tension were positively associated with sleep disorder(b'=0.356, 0.310, 0.179), and job satisfaction and support strategy were negatively associated(b=-0.072 and -0.040).
Conclusion Occupational stress related factors may have impact on sleep disorder of the locomotive drivers in Zhengzhou. In order to improve the sleep quality of the locomotive drivers, corresponding intervention measures should be considered.
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