Abstract
ObjectivesTo examine the associations of multimorbidity patterns with health-related quality of life (HRQL) in rural-dwelling older adults in China, and to explore to what extent their associations were mediated by functional dependence and depressive symptoms. DesignPopulation-based cross-sectional study. Setting and participants1497 participants (age ≥60 years; 66.4% women) in the 2014-2016 examination of the Confucius Hometown Aging Project who were living in a rural community near Qufu, Shandong, China. MeasuresData on demographics, lifestyles, chronic health conditions, and use of medications were collected through interviews, clinical examinations, and laboratory tests. Multimorbidity was defined as co-occurrence of ≥2 chronic diseases in the same person. The 15-item Geriatric Depression Scale (GDS-15) was used to assess depressive symptoms, and EQ-5D-3L was used to assess HRQL. ResultsMultimorbidity was present in 83.8% of the participants (women vs men: 85.5% vs 80.6%, P = .015). Exploratory factor analysis identified 4 patterns of multimorbidity, that is, patterns of cardiovascular-degenerative, respiratory, neurologic-thyroid, and metabolic-cognitive-cerebrovascular diseases. The neurologic-thyroid disease pattern did not show a significant association with HRQL. The 3 other patterns were associated with poor HRQL and had a diverse impact on different dimensions of HRQL. Mediation analysis suggested that functional dependence and the presence of depressive symptoms could mediate 24.8% and 21.8%, respectively, of the association between the number of chronic diseases and poor HRQL. Conclusions/ImplicationsMultimorbidity is associated with poor HRQL in older adults, in which functional dependence and depressive symptoms partly mediate their associations. Prevention and proper management of dependence and depressive symptoms in older people with multimorbidity may help maintain and improve quality of life.
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