Clinical Section: Research Article
Zhou J. · Li X. · Gao X. · Wei Y. · Ye L. · Liu S. · Ye J. · Qiu Y. · Zheng X. · Chen C. · Wang J. · Kraus V.B. · Lv Y. · Mao C. · Shi X.
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Article / Publication Details
Abstract
Introduction: About half of adults aged ≥ 80 years suffer from frailty. Exercise is considered effective in preventing frailty but may be inapplicable to adults aged ≥ 80 years due to physical limitations. As an alternative, we aimed to explore the association of leisure activities with frailty and identify potential interaction with established polygenic risk score (PRS) among adults aged ≥ 80 years. Methods: Analyses were performed in a prospective cohort study of 7471 community-living older adults aged ≥ 80 years who were recruited between 2002 and 2014 from 23 provinces in China. Leisure activity was assessed using a seven-question leisure activity index and frailty was defined as a frailty index ≥ 0.25 using a validated 39-item health-related scale. The PRS was constructed using 59 single-nucleotide polymorphisms associated with frailty in a subsample of 2541 older adults. Cox proportional hazards models were used to explore the associations of leisure activities, PRS with frailty. Results: The mean age of participants was 89.4 ± 6.6 years (range: 80–116). In total, 2930 cases of frailty were identified during 42,216 person-years of follow-up. Each 1 unit increase in the leisure activity index was associated with 12% lower risk of frailty (hazard ratio [HR]: 0.88 [95%CI, 0.85-0.91]). Participants with high genetic risk (PRS>2.47×10-4) suffered from 26% higher risk of frailty. Interaction between leisure activity and genetic risk was not observed. Conclusion: Evidence is presented for the independent association of leisure activities and genetic risk with frailty. Engagement in leisure activities suggested to be associated with lower risk of frailty across all levels of genetic risk among adults aged ≥ 80 years.
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