Table 4.

Predictive ability of the Cincinnati Pre-Hospital Stroke Severity Score (CPSSS)

Outcome	CPSSS cut-point	Sensitivity (%)	Specificity (%)	Positive likelihood ratio	Negative likelihood ratio
LVO	0	100.0	0.0	1.0	NC
	≥1	86.2	79.8	4.3	0.2
	≥2	70.0	86.8	5.3	0.3
	≥3	51.2	93.0	7.3	0.5
	4	25.0	96.2	6.6	0.8
NIHSS ≥ 15	0	100.0	0.0	1.0	NC
	≥1	93.2	85.7	6.5	0.1
	≥2	87.2	94.3	15.4	0.1
	≥3	61.5	98.2	33.7	0.4
	4	35.0	99.8	191.7	0.6

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