Intra-individual variability in sleep duration and fragmentation: Associations with stress
Intra-individual variability in sleep duration and fragmentation: Associations with stress
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DOI：
10.1016/j.psyneuen.2009.04.005
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发表时间：
2009-10-01
影响因子：
3.7
通讯作者：
Reis, Steven E.
中科院分区：
文献类型：
--
作者：
Mezick, Elizabeth J.;Matthews, Karen A.;Reis, Steven E.
尽管越来越多的证据表明，睡眠持续时间和片段存在大量的夜间个体内变异性，但很少有研究调查这种变异性的相关性。目前的研究检查了睡眠参数的个体内变异性是否与心理社会有关。和压力的生理指标，特别是那些负面情绪高的人。匹兹堡睡眠评分研究的参与者是184名46-78岁的成年人（53%男性和41%黑人）。腕动记录法被用来估计九个晚上的睡眠持续时间和碎片，并收集两个晚上的尿去甲肾上腺素过夜样本。还报告了压力性生活事件、抑郁和焦虑。在活动记录仪测量的睡眠持续时间和碎片方面，个体内差异超过了人与人之间的差异。压力性生活事件与夜间持续时间和碎片化的变异性增加相关（ps <0.05）。负性情绪调节了去甲肾上腺素和睡眠变异性之间的关联，因此，体动计测量的最大变异性发生在高去甲肾上腺素水平和高负性情绪的人群中（ps <0.05）。这些数据表明，心理社会和生理压力都与个人的陡峭持续时间和碎片的夜间变异性增加有关，特别是在那些报告负面情绪的人中。这些结果可能对陡峭和健康研究都有影响。(C)2009爱思唯尔有限公司保留所有权利。
Despite growing evidence that there is substantial nightly, intra-individual variability in sleep duration and fragmentation, few studies have investigated the correlates of such variability. The current study examined whether intra-individual variability in sleep parameters was associated with psychosocial. and physiological indices of stress, especially among those high in negative affect. Participants were 184 adults aged 46-78 (53% men and 41% Black) in the Pittsburgh SleepSCORE study. Wrist actigraphy was used to estimate sleep duration and fragmentation for nine nights, and overnight samples of urinary norepinephrine were collected for two nights. Stressful life events, depression, and anxiety were also reported. Intra-individual differences exceeded between-person differences in actigraphy-measured sleep duration and fragmentation. Stressful life events were associated with increased nightly variability in duration and fragmentation (ps < .05). Negative affect moderated associations between norepinephrine and variability in sleep, such that the greatest variability in actigraphy measures was among those with both high norepinephrine levels and high negative affect (ps < .05). These data suggest that both psychosocial and physiological stress are related to increased nightly variability in individuals' steep duration and fragmentation, particularly among those reporting negative emotions. These results may have implications for both steep and health research. (C) 2009 Elsevier Ltd. All rights reserved.