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To explore the association between sleep duration and fall incidents among middle-aged and elderly individuals in China.
A cross-sectional analysis was conducted using data from the 2020 China Health and Retirement Longitudinal Study (CHARLS), involving 18 515 participants aged 45 and older. Demographic characteristics, behaviors, lifestyle factors, and health status of the subjects were collected, and logistic regression and restricted cubic spline (RCS) models were employed to investigate the relationship between sleep duration and fall risk.
The incidence of falls among middle-aged and elderly individuals in China over two years was 17.20%, with an average sleep duration of (6.11 ± 1.86) hours. The fall incidence for those sleeping less than 5 hours per night was 26.39%, for 5 to less than 7 hours was 16.39%, for 7 to less than 9 hours was 13.04%, for 9 to less than 11 hours was 15.99%, and for those sleeping 11 hours or more was 30.00%. Multivariate logistic regression results indicated that the fall risks for individuals with sleep durations of less than 5 hours, 5 to less than 7 hours, and 11 hours or more were 1.46,1.15, and 2.01 times higher respectively compared to those sleeping 7 to less than 9 hours (P < 0.05). Analysis using the restricted cubic spline model revealed a U-shaped non-linear dose-response relationship between sleep duration and falls (overall trend P <0.05, non-linear test P < 0.05), with the lowest risk of falls occurring at approximately 7.5 hours of sleep.
Falls are significantly associated with both short and long sleep durations, with the optimal sleep duration being around 7.5 hours. Intervention measures should be implemented for middle-aged and elderly individuals with poor sleep quality to reduce their fall risk.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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