Table 3.

The Value Evaluation for the Risk Models in Training and Validation Sets

Variables	AUC	95% CI	Specificity	Sensitivity	Positive Predictive Value	Negative Predictive Value	P^
Training Set
Admission NIHSS score	0.937	0.891–0.983	0.940	0.828	0.600	0.980	0.214
Age (years)	0.660	0.565–0.755	0.383	0.897	0.137	0.971	0.003
WBC (109/L)	0.819	0.727–0.910	0.868	0.724	0.375	0.966	0.002
History of COPD (%)	0.548	0.482–0.613	0.959	0.140	0.267	0.911	<0.001
Nomogram	0.958	0.918–0.997	0.932	0.931	0.600	0.992	Reference
Validation set
Admission NIHSS score	0.915	0.781–1.000	0.948	0.909	0.625	0.991	0.090
Age (years)	0.727	0.595–0.860	0.448	1.000	0.147	1.000	<0.001
WBC (109/L)	0.677	0.473–0.881	0.741	0.636	0.189	0.956	0.003
History of COPD (%)	0.520	0.428–0.611	0.948	0.091	0.143	0.917	<0.001
Nomogram	0.962	0.898–1.000	0.957	0.909	0.667	0.991	Reference

Note: ^{^}Comparison in Predictive Power of the Nomogram and other models. Bold text indicates a statistically significant difference with a p-value less than 0.05.

Abbreviations: WBC, white blood cell; COPD, chronic obstructive pulmonary disease.