Department of Occupational Health, Faculty of Medicine, McGill University, Montreal, Quebec, Canada.
Occup Med (Lond). 2009 Jan;59(1):14-9. doi: 10.1093/occmed/kqn141. Epub 2008 Nov 10.
Working long overtime hours is considered a cause of mental health problems among workers but such a relationship has yet to be empirically confirmed.
To clarify the influence of overtime work on response to stress and to assess the role of other stress-related factors on this relationship.
The study was conducted among 24 685 employees of a company in Japan. Stress response, job stressors and social supports were assessed by the Brief Job Stress Questionnaire. Participants were divided into five categories of overtime (0-19, 20-39, 40-59, >or=60 h of overtime per month and exempted employees).
The nonadjusted odds ratios for stress response for 40-59 and >or=60 overtime hours per month in reference to 0-19 overtime hours were 1.11 [95% confidence interval (CI) 1.03-1.19] and 1.62 (95% CI 1.50-1.76), respectively. After adjustment for self-assessed amount of work, mental workload and sleeping time, the association between overtime work and stress response disappeared.
This large cross-sectional study shows that overtime work appears to influence stress response indirectly through other stress factors such as self-assessed amount of work, mental workload and sleeping time.
长时间加班被认为是导致工人心理健康问题的一个原因，但这种关系尚未得到实证证实。
阐明加班工作对压力反应的影响，并评估其他与压力相关的因素在这种关系中的作用。
这项研究在日本一家公司的 24685 名员工中进行。通过简要工作压力问卷评估了压力反应、工作压力源和社会支持。参与者被分为五个加班时间类别（每月加班 0-19、20-39、40-59、≥60 小时和豁免员工）。
与每月加班 0-19 小时相比，每月加班 40-59 小时和≥60 小时的压力反应的未调整比值比分别为 1.11（95%置信区间 1.03-1.19）和 1.62（95%置信区间 1.50-1.76）。在调整自我评估工作量、心理工作量和睡眠时间后，加班工作与压力反应之间的关联消失了。
这项大型横断面研究表明，加班工作似乎通过自我评估工作量、心理工作量和睡眠时间等其他压力因素间接影响压力反应。
