College of Sports, Nanjing Tech University, Nanjing, China.
School of Athletic Performance, Shanghai University of Sport, Shanghai, China.
BMC Public Health. 2024 Sep 2;24(1):2381. doi: 10.1186/s12889-024-19900-0.
OBJECTIVE: This study aims to investigate the relationship between midday nap time, nighttime sleep duration, and mild cognitive impairment (MCI) in Chinese older adults and determine the recommended sleep duration to provide a scientific basis for preventing and managing MCI in this population. METHODS: Utilizing the 2020 China Health and Retirement Longitudinal Study database, the demographic data, health status, and lifestyle information of the study participants were collected. A total of 5,314 valid samples were included in the analysis. Logistic regression and restricted cubic spline plots were employed to explore the relationship between sleep patterns and MCI. RESULTS: In the cross-sectional analysis, a linear relationship was observed between midday nap duration and MCI among Chinese elderly. The probability of MCI was lowest among those who napped for less than 30 min at noon. Compared with individuals who napped for30-90 min, those who did not nap were more likely to have MCI (OR = 1.30, 95% CI: 1.05-1.60). Older adults with napping duration < 30 min (OR = 0.73, 95% CI:0.56-0.95) also exhibited lower probability of MCI when compared those without napping habit, Nighttime sleep duration exhibited a U-shaped relationship with MCI. Individuals with less than approximately 6 h of nighttime sleep showed a gradual decrease in the probability of MCI with increasing sleep duration, whereas those with more than 7.5 h demonstrated an increase in the probability of MCI with longer sleep duration. Older adults who slept less than 6 h at night (OR = 1.22, 95% CI: 1.01 ~ 1.46) or more than 8 h (OR = 1.78, 95% CI: 1.35-2.33) were more likely to develop MCI compared with those who slept 6 to 8 h. CONCLUSION: After controlling for potential confounding variables, both nighttime sleep duration and midday nap duration exhibited a nonlinear "U"-shaped relationship with MCI among the elderly. The probability of depression was lower with a nap duration of approximately 60 min, and the optimal nighttime sleep duration was 6-8 h, with around 7 h providing the greatest cognitive benefits.
目的：本研究旨在探讨中国老年人午睡时间、夜间睡眠时间与轻度认知障碍（MCI）之间的关系，并确定推荐的睡眠时间，为该人群预防和管理 MCI 提供科学依据。
方法：利用 2020 年中国健康与退休纵向研究数据库，收集研究参与者的人口统计学数据、健康状况和生活方式信息。共纳入 5314 个有效样本进行分析。采用逻辑回归和限制立方样条图探讨睡眠模式与 MCI 之间的关系。
结果：在横断面分析中，中国老年人午睡时间与 MCI 呈线性关系。午睡时间小于 30 分钟的老年人发生 MCI 的概率最低。与午睡 30-90 分钟的人相比，不午睡的人更容易发生 MCI（OR=1.30，95%CI：1.05-1.60）。午睡时间小于 30 分钟的老年人（OR=0.73，95%CI：0.56-0.95）发生 MCI 的概率也低于无午睡习惯的老年人。夜间睡眠时间与 MCI 呈 U 形关系。夜间睡眠时间少于约 6 小时的个体，随着睡眠时间的增加，MCI 的发生概率逐渐降低，而睡眠时间超过 7.5 小时的个体，随着睡眠时间的延长，MCI 的发生概率增加。夜间睡眠时间少于 6 小时（OR=1.22，95%CI：1.01-1.46）或超过 8 小时（OR=1.78，95%CI：1.35-2.33）的老年人发生 MCI 的可能性高于夜间睡眠时间为 6 至 8 小时的老年人。
结论：在控制潜在混杂因素后，夜间睡眠时间和午睡时间与老年人的 MCI 呈非线性“U”形关系。午睡时间约为 60 分钟时，发生抑郁的概率较低，最佳夜间睡眠时间为 6-8 小时，约 7 小时时认知获益最大。
Front Public Health. 2025-1-7
Biomed Environ Sci. 2023-8-20
J Nutr Health Aging. 2025-3
Nat Commun. 2021-4-20
Gen Psychiatr. 2021-1-25
Zotero 插件