Intermediate, But Not Extended, Afternoon Naps May Preserve Cognition in Chinese Older Adults
Intermediate, But Not Extended, Afternoon Naps May Preserve Cognition in Chinese Older Adults
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DOI：
10.1093/gerona/glx069
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发表时间：
2018-03-01
影响因子：
5.1
通讯作者：
Gooneratne, Nalaka S.
中科院分区：
文献类型：
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作者：
Li, Junxin;Chang, Yu-Ping;Gooneratne, Nalaka S.
在老年人中，白天小睡和认知之间的关系还没有得到很好的研究。本研究旨在探讨中国老年人自我报告的午睡时间与认知变化之间的关系。共纳入3037名来自中国健康与退休纵向研究基线和2年随访的60岁及以上老年人。总体认知通过三个基于访谈的子测量来评估：时间和注意力取向、情景记忆和视觉空间能力。认知变化得分在受试者中计算为随访减去基线水平。根据自我报告的午睡时间，老年人被分为：(i)不午睡（0分钟）；小睡时间短（< 30分钟）；（iii）适度午睡（30-90分钟）；（iv）在基线和随访时延长午睡时间（90分钟）。在控制了年龄、性别、受教育程度、体重指数、抑郁、活动能力、日常生活工具活动、夜间睡眠时间和基线认知的情况下，认知变化与基线午睡和从基线到随访期间午睡习惯的变化均显著相关。在从基线到随访的整体认知变化方面，午睡时间过长者的表现明显比不午睡者、午睡时间过短者和午睡时间适中者差。在两项评估中，午睡时间都少于90分钟的人从基线到随访的表现都明显好于不午睡或长时间午睡的人。结果表明，少于90分钟的下午小睡可能对老年人的认知有益，而长时间的下午小睡可能有害。
The association between daytime napping and cognition is not well-studied in older adults. This study aimed to examine the associations between self-reported afternoon nap duration and change in cognition after 2-year follow-up in Chinese older adults.A total of 3,037 individuals aged 60 years and older from the China Health and Retirement Longitudinal Study baseline and 2-year follow-up were included. Overall cognition was assessed by three interview-based sub-measures of orientation to time and attention, episodic memory, and visuospatial abilities. Change scores in cognition were calculated within subjects as follow-up minus baseline levels. Based on self-reported nap duration, older adults were grouped into: (i) Non-nappers (0 minutes); (ii) Short nappers (< 30 minutes); (iii) Moderate nappers (30-90 minutes); and (iv) Extended nappers (> 90 minutes) at baseline and follow-up.Change in cognition was significantly associated with both baseline napping and changes in napping habits from baseline to follow-up, controlling for age, gender, education, body mass index, depression, mobility, instrumental activities of daily living, nocturnal sleep duration, and cognition at baseline. Extended nappers at baseline performed significantly worse with respect to change of overall cognition from baseline to follow-up than non-nappers, short nappers, and moderate nappers. People who napped less than 90 minutes at both assessments performed significantly better from baseline to follow-up compared to non- or extended nappers at both assessments.Results suggest that afternoon naps less than 90 minutes may be beneficial for cognition in older adults, while long afternoon naps may be detrimental.