C-reactive protein concentration as a risk predictor of mortality in intensive care unit: a multicenter, prospective, observational study

Table 3 NRI and IDI analyses for risk reclassification of ICU mortality

Models	Category-free NRI (95%CI)	P value	Category-free NRI (95%CI)				IDI (95% CI)	P value
Models	Category-free NRI (95%CI)	P value	With Event	P value	Without Event	P value	IDI (95% CI)	P value
APACHE II score	Referent						Referent
APACHE II score + CRP > 62.8 mg/L	0.556 (0.3705–0.7484)	<.0001	0.02 (0.0123–0.0324)	0.7851	0.53 (0.435–0.7371)	<.0001	0.013 (0.008–0.024)	0.0245

APACHE II Acute Physiology And Chronic Health Evaluation II, CI confidence interval, CRP C-reactive protein, IDI integrated discrimination improvement; NRI Net reclassification index

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