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首页> 外文期刊>Chronobiology international >LIGHT INTENSITY EXPOSURE, SLEEP DURATION, PHYSICALACTIVITY, AND BIOMARKERS OF MELATONIN AMONGROTATING SHIFT NURSES
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LIGHT INTENSITY EXPOSURE, SLEEP DURATION, PHYSICALACTIVITY, AND BIOMARKERS OF MELATONIN AMONGROTATING SHIFT NURSES

机译：旋转换位护士中褪黑素的光强度暴露，睡眠时间，体力活动和生物标志物

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Long-term, night shiftwork has been identified as a potential carcinogenic risk factor. Itis hypothesized that increased light at night exposure during shiftwork reduces mela-tonin production, which is associated with increased cancer risk. Sleep duration hasbeen hypothesized to influence both melatonin levels and cancer risk, and it hasbeen suggested that sleep duration could be used as a proxy for melatonin production.Finally, physical activity has been shown to reduce cancer risk, and laboratory studiesindicate it may influence melatonin levels. A cross-sectional study of light exposure,sleep duration, physical activity, and melatonin levels was conducted among 61female rotating shift nurses (work schedule: two 12 h days, two 12 h nights, five daysoff). Light intensity was measured using a light-intensity data logger, 4nd sleepduration and physical activity were self-reported in a study diary and questionnaire.Melatonin concentrations were measured from urine and saliva samples. Thecharacteristics of nurses working day and night shifts were similar. Light intensitywas significantly higher during sleep for those working at night (p < 0.0001), whileurinary melatonin levels following sleep were significantly higher among thoseworking days (p = 0.0003). Mean sleep duration for nurses working during the day(8.27 h) was significantly longer than for those working at night (4.78 h, p < 0.0001).An inverse association (p = 0.002) between light exposure and urinary melatoninlevels was observed; however, this was not significant when stratified by shift group.There was no significant correlation between sleep duration and melatonin, and noconsistent relationship between physical activity and melatonin. Analysis of salivarymelatonin levels indicated that the circadian rhythms of night workers were notaltered, meaning peak melatonin production occurred at night. This study indicatesthat two nights of rotating shift work may not change the timing of melatoninproduction to the day among those working at night. Additionally, in this study,sleep duration was not correlated with urinary melatonin levels, suggesting it may notbe a good proxy for melatonin production.
机译：长期的夜班工作已被确定为潜在的致癌危险因素。据推测，在轮班期间夜间暴露的光线增加会减少褪黑素的产生，这与增加的癌症风险有关。假设睡眠时间会影响褪黑激素水平和癌症风险，并且建议睡眠时间可以替代褪黑激素的产生。最后，体育锻炼已显示出可以降低癌症风险，实验室研究表明它可能影响褪黑激素的水平。 。在61名女性轮岗护士中进行了一项关于光照，睡眠时间，身体活动和褪黑激素水平的横断面研究（工作日程：两个12小时，两个12小时，五个工作日）。使用光强度数据记录仪测量光强度，在研究日记和问卷中自我报告第四次睡眠持续时间和身体活动，并从尿液和唾液样本中测量褪黑激素浓度。护士白天和晚上轮班的特征是相似的。对于夜间工作的人，睡眠期间的光强度显着更高（p <0.0001），而在那些工作日中，睡眠后的尿中褪黑激素水平显着较高（p = 0.0003）。白天工作的护士（8.27 h）的平均睡眠时间显着长于夜间工作的护士（4.78 h，p <0.0001）。光照和尿液中褪黑激素水平呈负相关（p = 0.002）;睡眠时间与褪黑激素之间无显着相关性，体力活动与褪黑素之间无显着相关性。唾液中褪黑激素水平的分析表明，夜班工人的昼夜节律没有改变，这意味着黑夜中的褪黑激素产量最高。这项研究表明，在夜间工作的两个晚上，轮换工作可能不会改变褪黑素的产生时间。另外，在这项研究中，睡眠时间与尿中褪黑激素水平无关，这表明它可能不是褪黑激素产生的良好替代。

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