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Abstract

This study used longitudinal data from the China Health and Retirement Longitudinal Study (CHARLS; n = 7,900, aged ≥60) to examine the mechanisms linking the number of chronic diseases with health-related quality of life (HRQoL) in older Chinese adults. Chronic diseases were significantly associated with reduced HRQoL (β_total = −0.01, 95% CI: −0.011, −0.009). Disability and depressive symptoms jointly mediated 69% of this effect through independent (β_disability = −0.0027, 95% CI: −0.0031, −0.0022; β_depressive = −0.0034, 95% CI: −0.0039, −0.003) and chain mediation (β_{disability-depressive} = −0.0008, 95% CI: −0.0009, −0.0006). Notably, informal social support moderated this negative relationship (β = 0.002, 95% CI: 0.001, 0.003), while formal social support had no significant impact (β = −0.0002, 95% CI: −0.001, 0.002). This study highlighted the need for interventions targeting management of disability and depressive symptoms, while leveraging informal care networks to mitigate HRQoL decline in the elderly.

Keywords

chronic diseases health-related quality of life disability depressive symptoms social support

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Mechanisms Linking the Number of Chronic Diseases to Health-Related Quality of Life in Older Adults: The Roles of Disability,Depressive Symptoms,and Social Support

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