Full
Outline
To explore the mediating role of sleep duration and anxiety in the association between dietary diversity and depression in older adults, so as to inform improvements in their mental health.
This study utilised data from the 2018 Chinese Longitudinal Healthy Longevity Survey (CLHLS), selecting 7 744 participants. Spearman’s correlation analysis was employed to investigate the relationships between dietary diversity, sleep duration, anxiety, and depression among older adults. The mediating effects of sleep duration and anxiety on the association between dietary diversity and depression were analysed using Model 6 of the Process 4.2 plugin in SPSS.
There was a statistically significant direct effect of dietary diversity on depression in older adults (β=-0.348，95% CI: -0.408~-0.288), a statistically significant separate mediated effect of sleep duration (β=-0.027，95% CI: -0.037~-0.018), a statistically significant separate mediated effect of anxiety (β=-0.181，95% CI: -0.220~-0.142), and a statistically significant chain mediated effect of sleep duration and anxiety (β=-0.016，95% CI:-0.022~-0.011).
Dietary diversity can directly and negatively affect the level of depression in older adults, or it can affect the level of depression in older adults through the separate or chain-mediated effects of sleep duration and anxiety.Therefore, it is recommended that the dietary structure of the elderly should be improved, nutritional intake should be guaranteed, and attention should be paid to sleep regulation to alleviate the anxiety of the elderly, thereby alleviating their depressive conditions.
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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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