Universidad de Castilla-La Mancha, Health and Social Care Research Center, 16071, Cuenca, Spain.
Universidad Politécnica Y Artística del Paraguay, Asunción, 001518, Paraguay.
BMC Geriatr. 2022 Sep 15;22(1):756. doi: 10.1186/s12877-022-03436-2.
No clear evidence is available for the influence of napping on cognitive function in older adults. This systematic review and meta-analysis aimed to elucidate the cross-sectional and longitudinal relationships between napping and cognitive function (global cognition and memory) and to explore whether some individual characteristics and sleep characteristics can modify this relationship.
We systematically searched Medline (via PubMed), Web of Science, and Scopus. DerSimonian and Lair and Hartung-Knapp-Sidik-Jonkman random effects methods were used to compute pooled estimates of odds ratios (ORs) and their respective 95% confidence intervals (95% CIs) for the association of global cognition and memory with napping. The mean age, the night sleep time (hours), and the percentage of women, no nappers, and people in the less night-time sleep duration category were used for meta-regressions.
Twenty-five studies were included in this systematic review and meta-analysis, 18 cross-sectional and seven longitudinal studies, including 95,719 participants older than 60 years. The pooled ORs from the cross-sectional analyses were 1.03 (95% CI: 1.01 to 1.06) for global cognition and 1.06 (95%: 0.90 to 1.26) for memory. The pooled ORs from the longitudinal analyses were 1.00 (95% 0.85 to 1.18) for global cognition and 1.08 (95% 0.98 to 1.19) for memory. These associations were not modified by individual or sleep characteristics.
Our data confirm the absence of association between napping and global cognition and memory regardless of the characteristics of the population. This information might be considered when providing lifestyle recommendations to adults with and without cognitive complaints.
目前尚无明确证据表明打盹对老年人认知功能的影响。本系统评价和荟萃分析旨在阐明打盹与认知功能（整体认知和记忆）的横断面和纵向关系，并探讨个体特征和睡眠特征是否可以改变这种关系。
我们系统地检索了 Medline（通过 PubMed）、Web of Science 和 Scopus。采用 DerSimonian 和 Lair 以及 Hartung-Knapp-Sidik-Jonkman 随机效应方法计算了整体认知和记忆与打盹之间关联的汇总比值比（OR）及其各自的 95%置信区间（95%CI）。平均年龄、夜间睡眠时间（小时）以及女性、不打盹者和夜间睡眠时间较短者的比例用于元回归分析。
本系统评价和荟萃分析共纳入 25 项研究，包括 18 项横断面研究和 7 项纵向研究，共有 95719 名年龄大于 60 岁的参与者。横断面分析的汇总 OR 分别为整体认知 1.03（95%CI：1.01-1.06）和记忆 1.06（95%CI：0.90-1.26）。纵向分析的汇总 OR 分别为整体认知 1.00（95%CI：0.85-1.18）和记忆 1.08（95%CI：0.98-1.19）。这些关联不受个体或睡眠特征的影响。
无论人群特征如何，我们的数据均证实打盹与整体认知和记忆之间不存在关联。在向有或无认知障碍的成年人提供生活方式建议时，可以考虑这些信息。
