Table 3.

Predictors of acute ischemic stroke vs. no ischemic stroke in the derivation and validation cohorts.

	Derivation cohort (AIS N = 44, total N = 1,827)			External validation cohort (AIS N = 62, total N = 4,491)
Variable	OR (95% CI)	P-value	AUC	OR (95% CI)	P-value	AUC
History of prior stroke	41.43 (18.05–95.08)	<0.001	0.89	40.12 (19.34–82.30)	<0.001	0.82*
Platelet count at presentation ≥ 200 × 1,000/μL	2.85 (1.37–5.93)	0.005		1.18 (0.60–2.30)	0.635

^*The AUC for history of stroke alone was 0.84.

AIS, Acute Ischemic Stroke; OR, Odds ratio; CI, Confidence Interval; AUC, Area under curve.