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To explore the relationship between subjective cognitive decline and frailty in community-dwelling older adults with comorbidities, and analyze the mediating effects of self-perceptions of aging and cognitive reserve.
From June to October 2023, 505 community-dwelling older adults aged 65 and above in Xinxiang City with comorbidities were selected to conduct a questionnaire survey. Descriptive statistics, ANOVA and correlation analysis were performed on the data, and AMOS 27.0 was used to construct a chain mediation model.
Subjective cognitive decline had a positive impact on frailty (β=0.100, 95% CI: 0.006-0.191, P=0.040). Self-perceptions of aging and cognitive reserve played a mediating role between subjective cognitive decline and frailty (β=0.079, 95% CI: 0.042-0.123, P<0.001; β=0.029, 95% CI: 0.011-0.056, P<0.001), accounting for 36.12% and 13.37% of the total effect value, respectively. Moreover, self-perceptions of aging and cognitive reserve jointly played a chain-mediating role between subjective cognitive decline and frailty (β=0.010, 95% CI: 0.004-0.021, P<0.001), accounting for 4.77% of the total effect value.
The findings that self-perceptions of aging and cognitive reserve play independent mediating roles and a chain-mediating role between subjective cognitive decline and frailty suggest that attention should be paid to the subjective feelings of community-dwelling older adults with comorbidities. It is essential to cultivate a positive view of aging among the elderly and enhance their cognitive reserve levels. By doing so, the onset of frailty can be delayed, thus promoting healthy aging.
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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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