Table 4.

Comparison of NRI and IDI models for predicting the 1-year mortality in patients with ischemic stroke.

Index	Developing cohort			Verification cohort
	Estimate	95% CI	p value	Estimate	95% CI	p value
NRI (vs. GCS)	0.529	0.454–0.604	<0.001	0.265	0.160–0.369	<0.001
NRI (vs. SOFA)	0.473	0.395–0.551	<0.001	0.650	0.536–0.764	<0.001
NRI (vs. APS III)	0.361	0.288–0.434	<0.001	0.281	0.175–0.387	<0.001
NRI (vs. LODS)	0.278	0.202–0.353	<0.001	0.251	0.146–0.356	<0.001
NRI (vs. SAPS II)	0.247	0.174–0.319	<0.001	0.249	0.148–0.349	<0.001
NRI (vs. OASIS)	0.305	0.234–0.375	<0.001	0.195	0.100–0.290	<0.001
IDI (vs. GCS)	0.207	0.184–0.231	<0.001	0.157	0.120–0.193	<0.001
IDI (vs. SOFA)	0.200	0.174–0.226	<0.001	0.206	0.170–0.241	<0.001
IDI (vs. APS III)	0.151	0.126–0.175	<0.001	0.137	0.100–0.173	<0.001
IDI (vs. LODS)	0.156	0.131–0.182	<0.001	0.142	0.106–0.178	<0.001
IDI (vs. SAPS II)	0.120	0.097–0.143	<0.001	0.122	0.088–0.155	<0.001
IDI (vs. OASIS)	0.144	0.121–0.166	<0.001	0.126	0.094–0.158	<0.001

NRI, net reclassification index; IDI, integrated discrimination improvement; CI, confidence interval; GCS, Glasgow coma score; SOFA, sequential organ failure assessment; APS III, acute physiology score III; LODS, logistic organ dysfunction system; SAPS II, simplified acute physiology score II; OASIS, oxford acute severity of illness score. Cutoff: 0, 0.2, 0.4, 1.