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This study aims to examine the relationship between indoor ventilation frequency and depression levels among older adults, and further test the mediating effects of anxiety and self-rated health in this relationship, as well as the chained mediating pathways.
Using data from the 2018 China Longitudinal Health and Longevity Study (CLHLS), older adults aged≥60 years were selected as the study subjects, resulting in a final sample of 10 306 participants. Depression levels were measured using the 10-item Center for Epidemiologic Studies Depression Scale (CESD-10). Anxiety status was assessed via the 7-item Generalized Anxiety Disorder Scale (GAD-7). The relationship between indoor ventilation frequency and depression levels in older adults was examined, with further investigation into the mediating effects of anxiety and self-rated health on this relationship.
Indoor ventilation frequency showed significant negative correlations with both anxiety and depression levels (r=-0.062, P<0.01; r=-0.163, P<0.01), but a significant positive correlation with self-rated health (r=0.067, P<0.01). Anxiety was negatively correlated with self-rated health (r=-0.276, P<0.01) and significantly positively correlated with depression levels (r=0.529, P<0.01); self-rated health was significantly negatively correlated with depression levels (r=-0.444, P<0.01). The direct effect of indoor ventilation frequency on depression levels in the elderly was statistically significant (effect size=-0.327, 95%CI: -0.374--0.280, Bootstrap samples=5 000); Mediation factors played a statistically significant mediating role between indoor ventilation frequency and depression levels in the elderly (effect size=-0.013, 95%CI: -0.020--0.007, Bootstrap samples=5 000).
Increasing indoor ventilation frequency not only directly improves depression levels among the elderly but also indirectly influences depression through anxiety and self-rated health. Enhancing ventilation frequency alleviates anxiety symptoms and improves self-rated health, thereby effectively reducing depression levels in the elderly.
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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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