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

本研究旨在以证据为基础，探讨由睡眠障碍和轮班工作制引起的心理健康问题。我们以一家医院的轮班护士为研究对象，该医院的轮班制度正从8小时3班制转变为12小时2班制。我们还比较了倒班工人和普通白班工人的数据。12小时两班制下的工人比8小时三班制下的工人精神和身体状况更好。然而，返回随访问卷的参与者数量太少，不足以得出8小时制到12小时制的过渡效应。旋转相当不规则是另一个问题。对于白天工作的人来说，任务表现和白天困倦是影响他们心理健康的更重要因素，而不是加班。需求/控制模型（Karasek, 1979）被认为是其中一个重要因素。

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.