Table 5.

Predictive Ability of a Simplified CPSSS Limited to the Individual Items of Severe Arm Weakness and Conjugate Gaze Deviation

Outcome	Score cut-point	Sensitivity (%)	Specificity (%)	Positive likelihood ratio	Negative likelihood ratio
LVO	0	100.0	0.0	1.0	NC
	≥1	82.5	82.5	4.7	0.2
	≥2	58.8	90.2	6.0	0.5
	3	50.0	93.7	7.9	0.5
NIHSS ≥ 15	0	100.0	0.0	1.0	NC
	≥1	90.6	88.7	8.0	0.1
	≥2	64.1	94.7	12.1	0.4
	3	59.8	98.7	46.8	0.4

Abbreviations: LVO, large vessel occlusion; NIHSS, National Institutes of Health Stroke Scale; NC: not calculable.