ArticleThe journals of gerontology. Series A, Biological sciences and medical sciences2026
Associations of summary measures of longitudinal frailty assessments with health outcomes.
Article in The journals of gerontology. Series A, Biological sciences and medical sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAssessment of frailty has become common in clinical settings to risk-stratify older adults. Understanding how to use repeated measurements answers important questions both for the clinical use of serial assessments and understanding frailty trajectories.
methodsUsing 2012-16 Health and Retirement Study data, we calculated six summary measures of assessments of frailty index (FI, 3 assessments) and Fried Frailty Phenotype (FFP, 2 assessments): most recent value, maximum, minimum, mean, standard deviation (SD), and delta. We assessed the association of scaled values with mortality and institutionalization between 2016 and 2018, and three measures of epigenetic aging collected in 2016 using Cox, logistic, and linear regression respectively with adjustment for age, sex, and smoking. We then used LASSO (Least Absolute Shrinkage and Selection Operator) regression to determine which summary measures were most often retained.
results14 451 and 2196 individuals had complete data for FI and FFP respectively. The maximum and most recent frailty values had the strongest associations with the outcomes considered, while those of SD and delta were weakest. In LASSO regressions, the maximum and most recent values were most commonly retained (12-13 of 20 regressions), followed by SD (7), mean (6), and minimum and delta (1 each).
conclusionsThese findings show that maximum and most recent values of frailty tend to be most strongly associated with mortality. For clinicians, this means that the most recent assessment may be sufficient for many purposes and if historical data are unavailable.
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