Table 5. Properties of discrimination and reclassification for combining KDIGO with other individual models in predicting in-hospital mortality.

Model	IDI (95% CI)	P value	NRI (95% CI)	P value
APACHE II	15.9% (2.4%, 29.4%)	0.021	133% (89%, 177%)	<0.001
APACHE III	7.8% (-2.9%, 18.5%)	0.152	117% (68%, 165%)	<0.001
SOFA	20.7% (6.0%, 35.4%)	0.006	130% (86%, 174%)	<0.001
SCORTEN	14.2% (5.5%, 22.9%)	0.001	100% (49%, 151%)	0.0005

APACHE, Acute Physiology and Chronic Health Evaluation; CI, confidence interval; IDI, integrated discrimination index; KDIGO, Kidney Disease Improving Global Outcomes; NRI, net reclassification index; SCORTEN, severity-of-illness for toxic epidermal necrolysis; SOFA, sequential organ failure assessment score.