Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA.
J Clin Sleep Med. 2010 Aug 15;6(4):330-5.
To evaluate the relations between sleep characteristics and cardiovascular risk factors and napping behavior, and to assess whether daytime napping leads to subsequent better or worse sleep.
The sample consisted of 224 (African American, Caucasian, and Asian) middle-aged men and women. Sleep measures included nine nights of actigraphy and sleep diaries, sleep questionnaires, and one night of polysomnography to measure sleep disordered breathing.
More frequent napping was associated with shorter nighttime sleep duration averaged across the nine nights of actigraphy (especially among African Americans), more daytime sleepiness, more pain and fatigue by diary, and increased body mass index and waist circumference. Shorter nighttime sleep duration was associated with taking a nap during the next day and taking a nap was associated with less efficient sleep the next night.
Napping in middle-aged men and women is associated with overall less nighttime sleep in African Americans and lower sleep efficiency as measured by actigraphy, and increased BMI and central adiposity. These findings point to the importance of measuring of napping in understanding associations of sleep with cardiovascular risk.
评估睡眠特征与心血管危险因素和午睡行为之间的关系，并评估白天午睡是否会导致随后的睡眠质量变好或变差。
该样本由 224 名（非裔美国人、白种人和亚洲人）中年男女组成。睡眠测量包括 9 晚的活动记录仪和睡眠日记、睡眠问卷以及一晚的多导睡眠图来测量睡眠呼吸障碍。
午睡频率越高，平均 9 晚活动记录仪记录的夜间睡眠时间越短（尤其是非裔美国人），白天嗜睡程度越高，日记中疼痛和疲劳感越明显，体重指数和腰围也越大。夜间睡眠时间越短，第二天午睡的可能性越大，而午睡则与第二天晚上的睡眠效率降低有关。
在中年男女中，午睡与非裔美国人的夜间总睡眠时间减少以及活动记录仪测量的睡眠效率降低有关，并且与 BMI 和中心性肥胖增加有关。这些发现表明，在理解睡眠与心血管风险的关联时，测量午睡的重要性。
