Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands.
Department of Public and Occupational Health, Amsterdam Public Health Research Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.
J Sleep Res. 2024 Dec;33(6):e14184. doi: 10.1111/jsr.14184. Epub 2024 Feb 27.
Light exposure affects the circadian system and consequently can affect sleep quality. Only few studies examined this relationship in children. We evaluated associations between light exposure patterns and sleep metrics in children. We measured the sleep parameters of 247 Dutch children, aged between 11 and 13 years and recruited from the ABCD cohort, using actigraphy and sleep records for 7 consecutive nights. Personal light exposures were measured with a light meter during the whole day and night. We applied generalized mixed-effects regression models, adjusted for possible confounders, to evaluate the associations of light exposure patterns on sleep duration, sleep efficiency and sleep-onset delay. In the models mutually adjusted for potential confounders, we found the amount of hours between the first time of bright light in the morning and going to sleep and the duration of bright light to be significantly associated with decreased sleep duration (in min; β: -2.02 [95% confidence interval: -3.84, -0.25], β: -8.39 [95% confidence interval: -16.70, -0.07], respectively) and with shorter sleep-onset delay (odds ratio: 0.88 [95% confidence interval: 0.80, 0.97], odds ratio: 0.40 [95% confidence interval: 0.19, 0.87], respectively). Increased light intensities at night were associated with decreased sleep duration (T2 β: -8.54 [95% confidence interval: -16.88, -0.20], T3 β: -14.83 [95% confidence interval: -28.04, -1.62]), while increased light intensities before going to bed were associated with prolonged sleep onset (odds ratio: 4.02 [95% confidence interval: 2.09, 7.73]). These findings further suggest that children may be able to influence their sleep quality by influencing the light exposure patterns during day and night.
光照会影响昼夜节律系统，进而影响睡眠质量。只有少数研究调查了光照与儿童睡眠之间的关系。我们评估了儿童光照模式与睡眠指标之间的关联。我们使用活动记录仪和睡眠记录，对 247 名年龄在 11 至 13 岁之间的荷兰儿童进行了 7 个连续晚上的睡眠参数测量。在白天和晚上，使用光度计测量个人的光照暴露情况。我们应用广义混合效应回归模型，根据可能的混杂因素进行调整，以评估光照模式对睡眠时间、睡眠效率和入睡潜伏期的影响。在调整了潜在混杂因素的模型中，我们发现清晨第一次接触明亮光线到入睡的时间和暴露于明亮光线的时间与睡眠时间减少显著相关（以分钟计；β：-2.02[95%置信区间：-3.84，-0.25]，β：-8.39[95%置信区间：-16.70，-0.07]），且与入睡潜伏期缩短有关（比值比：0.88[95%置信区间：0.80，0.97]，比值比：0.40[95%置信区间：0.19，0.87]）。夜间增加的光照强度与睡眠时间减少有关（T2β：-8.54[95%置信区间：-16.88，-0.20]，T3β：-14.83[95%置信区间：-28.04，-1.62]），而睡前增加的光照强度与入睡潜伏期延长有关（比值比：4.02[95%置信区间：2.09，7.73]）。这些发现进一步表明，儿童可能通过影响昼夜光照模式来影响睡眠质量。
