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To explore the relationship between sleep disorder, depression, and health-related quality of life in the elderly, and the mediating effect of depression on sleep disorder and health-related quality of life.
In total 3 612 elderly people over 60 years old in Hebei Province were selected by stratified random sampling, and the related data were collected with the use of Pittsburgh sleep quality index (PSQI), the simplified geriatric depression scale (GDS-15), and concise health quality of life scale (SF-36).
There was a positive correlation between sleep disorder and depression in the elderly (r = 0.39, P < 0.001), and a negative correlation between sleep disorder, depression, and health-related quality of life (r = -0.43 and -0.40, P < 0.001). Sleep disorders and depression in the elderly had negative predictive effects on health-related quality of life (β =-0.26, -0.194,-0.43, and -0.520), and depression played a mediating role between sleep disorders and physical health-related quality of life in the elderly, accounting for 39.29% of the total effect. Depression played a mediating role between sleep disorders and mental health-related quality of life in the elderly, and the intermediary effect accounted for 51.57% of the total effect.
The health-related quality of life of the elderly with sleep disorder and depression is poor. Sleep disorder of the elderly not only directly affects the health-related quality of life, but also indirectly affects the physical and mental health-related quality of life of the elderly through depression.
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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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