The association between multimorbidity patterns and physical frailty among middle-aged and older community-dwelling adults

Background: This study aimed to investigate the association between multimorbidity and frailty, and the potential mediating role of depressive symptoms in Chinese middle-aged and older community-dwelling adults. Methods: We selected a total of 5,232 adults with two or more chronic diseases from the China Health and Retirement Longitudinal Study (CHARLS) database. Clusters of participants with similar multimorbidity patterns were identified through fuzzy c-means cluster analyses. The cross-sectional association between multimorbidity and frailty was measured through logistic regression analyses. Mediation analysis was applied to examine direct and indirect associations within the counterfactual framework. Results: = 0.042). Notably, in adults aged 60 years and older, this mediation accounted for 69.84% of the total effect, surpassing the direct impact of multimorbidity on frailty. Among individuals with economic support (0.020, 95% CI: 0.002-0.040), high school education (0.062, 95% CI: 0.007-0.120), and no alcohol consumption (0.024, 95% CI: 0.003-0.050), depression entirely mediated the impact of comorbidities. Conclusion: This study reveals strong links between specific multimorbidity patterns and physical frailty, with depression significantly mediating these effects, particularly in certain populations. Findings emphasize tailored mental health interventions' necessity in specific groups

Anxiety · Comorbidity · Depressive symptoms · Multimorbidity · Psychiatry · Chronic Disease Management Strategies · Frailty in Older Adults · Medicine · Primary Care and Health Outcomes · Psychology · Gerontology

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