Table 2.

Comparison of the Predictive Ability of Baseline Models With or Without Adding Information From Clinical Text

	Baseline AUC (95% CI)	Text‐enhanced AUC (95% CI)	P value	NRI (95% CI)	P value	IDI (95% CI)	P value
Internal validation
NIHSS	0.811 (0.783–0.839)	0.869 (0.846–0.891)	<0.001	0.766 (0.648–0.884)	<0.001	0.109 (0.089–0.129)	<0.001
Age and NIHSS	0.841 (0.815–0.866)	0.872 (0.850–0.895)	<0.001	0.514 (0.391–0.637)	<0.001	0.065 (0.049–0.080)	<0.001
PLAN score	0.837 (0.811–0.863)	0.870 (0.847–0.893)	<0.001	0.593 (0.471–0.715)	<0.001	0.061 (0.046–0.077)	<0.001
ASTRAL score	0.840 (0.814–0.866)	0.871 (0.849–0.894)	<0.001	0.527 (0.405–0.650)	<0.001	0.070 (0.054–0.086)	<0.001
External validation
NIHSS	0.807 (0.790–0.823)	0.843 (0.828–0.858)	<0.001	0.719 (0.648–0.791)	<0.001	0.089 (0.078–0.100)	<0.001
Age and NIHSS	0.838 (0.823–0.853)	0.854 (0.840–0.868)	<0.001	0.556 (0.482–0.630)	<0.001	0.043 (0.035–0.052)	<0.001
PLAN score	0.834 (0.818–0.849)	0.852 (0.838–0.867)	<0.001	0.561 (0.488–0.635)	<0.001	0.045 (0.037–0.054)	<0.001
ASTRAL score	0.839 (0.824–0.854)	0.854 (0.840–0.868)	<0.001	0.572 (0.499–0.646)	<0.001	0.052 (0.043–0.061)	<0.001

ASTRAL indicates Acute Stroke Registry and Analysis of Lausanne; AUC, area under the receiver operating characteristic curve; IDI, integrated discrimination improvement; NIHSS, National Institutes of Health Stroke Scale; NRI, net reclassification improvement; and PLAN, preadmission comorbidities, level of consciousness, age, and neurological deficit.