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Validation of the JEN frailty index in the National Long-Term Care Survey community population: identifying functionally impaired older adults from claims data
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Validation of the JEN frailty index in the National Long-Term Care Survey community population: identifying functionally impaired older adults from claims data
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Validation of the JEN frailty index in the National Long-Term Care Survey community population: identifying functionally impaired older adults from claims data
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Journal Article
Validation of the JEN frailty index in the National Long-Term Care Survey community population: identifying functionally impaired older adults from claims data
2018
Overview
Background
Use of a claims-based index to identify persons with physical function impairment and at risk for long-term institutionalization would facilitate population health and comparative effectiveness research. The JEN Frailty Index [JFI] is comprised of diagnosis domains representing impairments and multimorbid clusters with high long-term institutionalization [LTI] risk. We test the index’s discrimination of activities-of-daily-living [ADL] dependency and 1-year LTI and mortality in a nationally representative sample of over 12,000 Medicare beneficiaries, and compare long-term community survival stratified by ADL and JFI.
Methods
2004 U.S. National Long-Term Care Survey data were linked to Medicare, Minimum Data Set, Veterans Health Administration files and vital statistics. ADL dependencies, JFI score, age and sex were measured at baseline survey. ADL and JFI groups were cross-tabulated generating likelihood ratios and classification statistics. Logistic regression compared discrimination (areas under receiver operating characteristic curves), multivariable calibration and accuracy of the JFI and, separately, ADLs, in predicting 1-year outcomes. Hall-Wellner bands facilitated contrasts of JFI- and ADL-stratified 5-year community survival.
Results
Likelihood ratios rose evenly across JFI risk categories. Areas under the curves of functional dependency at ≥3 and ≥ 2 for JFI, age and sex models were 0.807 [95% c.i.: 0.795, 0.819] and 0.812 [0.801, 0.822], respectively. The area under the LTI curve for JFI and age (0.781 [0.747, 0.815]) discriminated less well than the ADL-based model (0.829 [0.799, 0.860]). Community survival separated by JFI strata was comparable to ADL strata.
Conclusions
The JEN Frailty Index with demographic covariates is a valid claims-based measure of concurrent activities-of-daily-living impairments and future long-term institutionalization risk in older populations lacking functional information.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Aged
/ Analysis
/ economics and financing systems
/ Female
/ Frailty
/ Geriatric Assessment - methods
/ Humans
/ Institutionalization - statistics & numerical data
/ Long-Term Care - statistics & numerical data
/ Male
/ Medicaid
/ Medicare
/ Medicare - statistics & numerical data
/ Medicine
