Job adaptation and shift work : from the view points of biological rhythms and mental health

本研究旨在以实证研究方法探讨工作适应不良与睡眠障碍及轮班工作制所引起的心理健康问题。本文以某医院的护士为研究对象，调查了8小时三班制向12小时两班制过渡的护士轮班情况。我们还比较了轮班工人和普通白班工人的数据。12小时两班制倒班工人的身心健康状况优于8小时三班制倒班工人。然而，返回随访问卷的参与者人数太少，无法得出从8小时到12小时系统的过渡效果。旋转相当不规则的事实是另一个问题。对于白天工作者来说，任务表现和白天嗜睡是比加班更重要的心理健康因素。需求/控制模型（Karasek，1979）被认为是一个重要的因素。

The study aimed at investigating job maladaptation with an evidence-based approach on mental health problems caused by sleep disturbances and shift work schedules. We focused on the nurses under shift works in a hospital, where the rotation shift schedules were in transition from 8-hour three to 12-hour two rotation shift systems. We also compared the data on the shift workers with that on regular daytime workers. The shift workers under 12-hour two rotation shift system reported better mental and physical conditions than 8-hour three rotation shift workers. However, the number of the participants who returned the follow-up questionnaire was too small to conclude the transitional effects from 8 to 12 hour system. The fact that the rotations were fairly irregular was another problem. As for the daytime workers, task performance and daytime sleepiness were more important determinants over their mental health than overtime work. Demand/Control Model (Karasek, 1979) was considered to be one of important factors.