Table 2.

Cut-off points for prediction of acute large vessel occlusion

Cut-off point	Sensitivity	Specificity	Positive predictive value	Negative predictive value	Accuracy	J
sNIHSS-EMS
5	74.8 (69.4–79.7)	73.4 (69.1–77.4)	66.4 (59.0–69.5)	81.9 (77.8–85.6)	74.0	0.482
6*	70.3 (64.7–75.5)	80.7 (76.8–84.3)	70.1 (64.5–75.3)	80.9 (76.9–84.4)	76.7	0.511
7	65.2 (59.4–70.6)	85.8 (82.2–88.9)	74.7 (68.9–79.9)	79.3 (75.4–82.8)	77.7	0.510
NIHSS
8	72.4 (66.9–77.5)	80.7 (76.8–84.3)	70.7 (65.2–75.8)	82.0 (78.1–85.4)	77.5	0.531
9*	69.3 (63.7–74.6)	85.4 (81.8–88.5)	75.3 (69.7–80.3)	81.2 (77.4–84.6)	79.1	0.547
10	65.9 (60.1–71.3)	88.0 (84.7–90.9)	78.0 (72.2–83.0)	80.0 (76.2–83.5)	79.4	0.539

Data are % (95% CI). J indicates Youden index.

*Indicates the optimal cut-off according to the Youden index.

NIHSS, NIH Stroke Scale; sNIHSS-EMS, shortened NIHSS for emergency medical services.