Table 3.

Performance of mortality models for acute ischemic stroke

	AUC (95 % CI)	Hosmer-Lemeshow statistic	P	IDI (95 % CI)	P
Mortality at 3 months
Base model	0.786 (0.752–0.819)	6.39	0.604	Reference
Model with SSI	0.869 (0.844–0.894)	7.07	0.529	0.102 (0.079–0.124)	<0.001
Model with NIHSS	0.860 (0.833–0.887)	7.17	0.519	0.085 (0.064–0.106)	<0.001
Mortality at 6 months
Base model	0.777 (0.748–0.805)	5.13	0.744	Reference
Model with SSI	0.844 (0.819–0.869)	5.41	0.713	0.097 (0.077–0.116)	<0.001
Model with NIHSS	0.837 (0.812–0.862)	5.86	0.662	0.082 (0.063–0.100)	<0.001
Mortality at 1 year
Base model	0.767 (0.741–0.793)	4.30	0.829	Reference
Model with SSI	0.823 (0.799–0.846)	8.88	0.353	0.101 (0.082–0.121)	<0.001
Model with NIHSS	0.816 (0.793–0.840)	6.42	0.600	0.088 (0.070–0.106)	<0.001

AUC area under the receiver operating characteristic curve, CI confidence interval, IDI integrated discrimination improvement, NIHSS National Institutes of Health Stroke Scale, SSI stroke severity index