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To analyze the multiple mediating effects of anxiety and depression symptoms between physical activity and cognitive function, and to provide evidence for slowing down the decline of cognitive function in the elderly.
A total of 9 323 elderly people aged 65 and above were selected from the 2018 China Aging Health Factors Follow-up Survey and their basic demographic characteristics were described. The correlation between physical activity, anxiety symptoms, depression symptoms, and cognitive function was investigated. The chain mediating effect model was used to analyze the multiple mediating effects of anxiety and depression between physical activity and cognitive function.
Physical activity, anxiety symptoms and depression symptoms were correlated with cognitive function (all P<0.001), and physical activity was positively correlated (r=0.41), anxiety symptoms (r=-0.12) and depression symptoms (r=-0.22) were negatively correlated. On the one hand, physical activity can directly affect cognitive function in older adults (effect=0.234 8, SE=0.012 2, 95% CI: 0.211 0-0.258 6). On the other hand, physical activity mediated cognitive function through anxiety and depression symptoms, among which, the independent mediating effect of anxiety was 0.002 6 (SE=0.001 2, 95% CI：0.000 3-0.005 3), and the independent mediating effect of depression was 0.018 6 (SE=0.012 3, 95% CI: 0.014 2-0.023 2). The series mediating effect of anxiety and depression was 0.006 1 (SE=0.001 1, 95% CI: 0.004 0-0.008 4).
Physical activity may improve cognitive function in older adults by reducing anxiety and depression. For the elderly, active participation in physical activity is beneficial to maintain a good mental state and slow down the decline of cognitive function.
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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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