Validation of the JEN frailty index in the National Long-Term Care Survey community population: identifying functionally impaired older adults from claims data.

For mortality, the AUC for JFI with demographic covariates was 0.76 [95% c.i.: 0.74, 0.78], with good calibration (H-L χ 2 , p = 0.350) and pseudo-R 2 (0.126); older subjects were at risk, male sex almost doubled the mortality risk, and the odds ratio for JFI was highly significant at 1.18--an 18% increase in mortality risk per JFI unit.

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