Objectives: Frailty is a heterogeneous syndrome with distinct patterns. This study aimed to identify frailty risk patterns and their predictive value for mortality in older adults.
Design: Prospective longitudinal study.
Setting And Participants: Data were obtained from a 2017 survey of 609 independently mobile adults aged 65 years and older in suburban Japan, focusing on those at risk for at least 1 frailty dimension.
Methods: Frailty assessments were extracted from the Kihon checklist, and subgroups were identified using latent class analysis. Associations between frailty patterns and 3-year mortality were assessed using Kaplan-Meier survival analysis and Cox proportional hazards modeling.
Results: Three frailty patterns were identified: "high risk of cognitive impairment" (76.0%), "moderate risk of cognitive, physical, and oral dysfunction" (14.3%), and "high risk of cognitive, physical, and functional decline" (9.7%). We recorded 52 deaths during a mean follow-up time of 25.7 months (standard deviation: 12.6) and a median follow-up time of 26.5 months. Kaplan-Meier analysis showed significant survival differences among the groups (log-rank: P < .001). Compared with the high risk of cognitive impairment group, the moderate risk of cognitive, physical, and oral dysfunction group had a 145% higher mortality risk (adjusted hazard ratio, 2.45; 95% confidence interval, 1.22-4.90), while the high risk of cognitive, physical, and functional decline group exhibited a 220% higher risk of mortality (adjusted hazard ratio, 3.20; 95% confidence interval, 1.53-6.70).
Conclusions And Implications: The findings reveal the heterogeneity of frailty among community-dwelling Japanese older adults, with a high prevalence of cognitive impairment risk. The subgroup with risk of cognitive, physical, and functional decline had the highest mortality risk, highlighting the need for multidimensional assessment and intervention.
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