SINTEF Technology and Society, Trondheim, Norway.
Int J Occup Saf Ergon. 2010;16(4):487-96. doi: 10.1080/10803548.2010.11076864.
The aim of this study was to investigate the circadian adaptation of tcr (core body temperature), BP (blood pressure), HR (heart rate) and subjective sleep quality after 7 days of working 12-h night shifts in offshore fleet workers.
Night workers (N = 7) (18:00-6:00) and day workers (N = 7) (6:00-18:00) were recruited from a Norwegian offshore company operating in the North Sea. We measured t(cr), BP and HR on days 1 and 7.
An increase of 0.6 °C (p = .03) was observed within the group of night workers from day 1 to day 7. Between the night and day workers there was a significant difference of 0.6 °C from day 1 to day 7 (p = .01). Sleep latency and sleep length also showed significant differences between the groups (p = .01 and p = .04). There was an interaction effect in tiredness during the shift (p = .02).
The significant increase in tcr indicates an adaptation in the night workers to the new working schedule, and the extended working hours and sleep deprivation are hypothesized to be the main cause of the increased t(cr). Light exposure, altered pattern of food availability and physical activity are likely to have contributed as well. Subjective sleep quality showed inconclusive results.
本研究旨在调查海上作业人员连续 7 天上夜班后，核心体温（tcr）、血压（BP）、心率（HR）和主观睡眠质量的昼夜节律适应性。
从一家在北海作业的挪威海上公司招募夜班工人（N = 7，18:00-6:00）和白班工人（N = 7，6:00-18:00）。我们在第 1 天和第 7 天测量了 t(cr)、BP 和 HR。
夜班工人组从第 1 天到第 7 天的体温升高了 0.6°C（p =.03）。夜班和白班工人之间在第 1 天到第 7 天有 0.6°C 的显著差异（p =.01）。睡眠潜伏期和睡眠时间也显示出组间的显著差异（p =.01 和 p =.04）。轮班期间疲劳的交互效应有统计学意义（p =.02）。
tcr 的显著升高表明夜班工人对新工作时间表的适应，延长工作时间和睡眠剥夺被认为是 t(cr)升高的主要原因。光照暴露、食物供应和体力活动模式的改变也可能有贡献。主观睡眠质量的结果不一致。
