Aili Katarina, Åström-Paulsson Sofia, Stoetzer Ulrich, Svartengren Magnus, Hillert Lena
Unit of Occupational Medicine, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
Department of Medical Sciences, Uppsala University, Uppsala, Sweden.
J Clin Sleep Med. 2017 Jan 15;13(1):39-47. doi: 10.5664/jcsm.6384.
The aim of the study was to investigate how many nights of measurement are needed for a reliable measure of sleep in a working population including adult women and men.
In all, 54 individuals participated in the study. Sleep was assessed for 7 consecutive nights using actigraphy as an objective measure, and the Karolinska sleep diary for a subjective measure of quality. Using intra-class correlation and the Spearman-Brown formula, calculations of how many nights of measurements were required for a reliable measure were performed. Differences in reliability according to whether or not weekend measurements were included were investigated. Further, the correlation between objectively (actigraphy) measured sleep and subjectively measured sleep quality was studied over the different days of the week.
RESULTS/CONCLUSIONS: The results concerning actigraphy sleep measures suggest that data from at least 2 nights are to be recommended when assessing sleep percent and at least 5 nights when assessing sleep efficiency. For actigraphy-measured total sleep time, more than 7 nights are needed. At least 6 nights of measurements are required for a reliable measure of self-reported sleep. Fewer nights (days) are required if measurements include only week nights. Overall, there was a low correlation between the investigated actigraphy sleep parameters and subjective sleep quality, suggesting that the two methods of measurement capture different dimensions of sleep.
本研究旨在调查在包括成年女性和男性的工作人群中，可靠测量睡眠需要多少个夜晚的测量数据。
共有54人参与了该研究。使用活动记录仪作为客观测量方法，连续7个晚上评估睡眠情况，并使用卡罗林斯卡睡眠日记作为睡眠质量的主观测量方法。运用组内相关系数和斯皮尔曼 - 布朗公式，计算可靠测量所需的测量夜晚数。研究了纳入或不纳入周末测量时可靠性的差异。此外，还研究了一周中不同日期客观（活动记录仪）测量的睡眠与主观测量的睡眠质量之间的相关性。
结果/结论：关于活动记录仪睡眠测量的结果表明，评估睡眠百分比时建议至少采用2个晚上的数据，评估睡眠效率时至少需要5个晚上的数据。对于活动记录仪测量的总睡眠时间，则需要超过7个晚上的数据。可靠测量自我报告的睡眠至少需要6个晚上的测量数据。如果测量仅包括工作日夜晚，则所需的夜晚（天数）较少。总体而言，所研究的活动记录仪睡眠参数与主观睡眠质量之间的相关性较低，这表明两种测量方法捕捉到了睡眠的不同维度。
