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Table 3 Performance of mortality models for acute ischemic stroke

From: Validity of a stroke severity index for administrative claims data research: a retrospective cohort study

 

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

  1. 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