Applied Physiology, Nutrition, and Metabolism, Volume 45, Issue 10 (Suppl. 2), Page S218-S231, October 2020.
The objective of this overview of systematic reviews was to examine the associations between sleep duration and health outcomes in adults. Four electronic databases were searched in December 2018 for systematic reviews published in the previous 10 years. Included reviews met the a priori determined population (community-dwelling adults aged 18 years and older), intervention/exposure/comparator (various levels of sleep duration), and outcome criteria (14 outcomes examined). To avoid overlap in primary studies, we used a priority list to choose a single review per outcome; reviews that examined the effect of age and those that looked at dose–response were prioritized. A total of 36 systematic reviews were eligible and 11 were included. Reviews included comprised 4 437 101 unique participants from 30 countries. Sleep duration was assessed subjectively in 96% of studies and 78% of studies in the reviews were prospective cohort studies. The dose–response curves showed that the sleep duration that was most favourably associated with health was 7–8 h per day. Modification of the effect by age was not apparent. The quality of the evidence ranged from low to high across health outcomes. In conclusion, the available evidence suggests that a sleep duration of 7–8 h per day is the one most favourably associated with health among adults and older adults. (PROSPERO registration no.: CRD42019119529.) Novelty This is the first overview of reviews that examines the influence of sleep duration on a wide range of health outcomes in adults. Seven to 8 h of sleep per day was most favourably associated with health. Effect modification by age was not evident.

中文翻译：

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成人睡眠时长与健康：系统评价概述

应用生理学、营养和代谢，第 45 卷，第 10 期（增刊 2），第 S218-S231 页，2020 年 10 月。
本系统综述概述的目的是检查成人睡眠持续时间与健康结果之间的关联。2018 年 12 月在四个电子数据库中搜索了过去 10 年发表的系统评价。纳入的评论符合先验确定的人群（18 岁及以上的社区居民）、干预/暴露/比较者（不同水平的睡眠时间）和结果标准（检查的 14 个结果）。为避免初级研究的重叠，我们使用优先列表来为每个结果选择一个评价；检查年龄影响的评论和关注剂量反应的评论被优先考虑。共有 36 篇系统评价符合条件，其中 11 篇被纳入。所包括的评论包括来自 30 个国家的 4 437 101 名独特的参与者。96% 的研究对睡眠持续时间进行了主观评估，评价中 78% 的研究是前瞻性队列研究。剂量反应曲线显示，与健康最密切相关的睡眠时间为每天 7-8 小时。年龄对效果的改变不明显。整个健康结果的证据质量从低到高不等。总之，现有证据表明，每天 7-8 小时的睡眠时间对成年人和老年人的健康最有利。（PROSPERO 注册号：CRD42019119529。） 新颖性 这是对睡眠时间对成人各种健康结果影响的第一篇综述概述。每天 7 到 8 小时的睡眠对健康最有利。年龄的影响改变不明显。