Table 3.

Evaluation of predictive models for 28‐day all‐cause mortality

	C‐statistic (95% CI)	NRI (95% CI)	IDI (95% CI)
Base model	0.786 (0.706–0.865)	Reference	Reference
Base model + FS	0.854 (0.802–0.907)	0.746 (0.475–1.017)	0.058 (0.022–0.093)
Base model + FSQ	0.832 (0.764–0.900)	0.717 (0.415–1.018)	0.026 (−0.008, 0.059)
Base model + CFS	0.811 (0.733–0.888)	0.372 (0.070–0.673)	0.020 (0.007–0.033)

Base model included: age, gender, body mass index and chronic diseases (hypertension, diabetes, chronic kidney disease, chronic obstruction pulmonary disease, coronary heart disease, stroke).

CFS, clinical frailty scale; CI, confidence interval; FS, FRAIL scale; FSQ, frailty screening questionnaire; IDI, integrated discrimination improvement; NRI, net reclassification improvement.