Table 2

Emergent large vessel occlusion clinical grading scale predictive metrics

Clinical grading scale	Lead author, year	Sensitivity	Specificity	Positive predictive palue	Comment
RACE	Perez de la Ossa,et al⁵⁹ 2014	85%	68%	42%	9-point scale A cut-off value of≥5 was used
	Lima, et al63 2016	56%	87%	68%
	Hastrup, et al64 2016	59%	86%	70%
CPSS	Katz, et al61 2015	83%	40%	NP	4-point scale A cut-off of ≥2 was used
	Lima, et al63 2016	55%	85%	65%
	Kummer, et al 60 2016	70.0%	86.8%	NP
	Hastrup, et al64 2016	59%	86%	69%
LAMS	Nazliel, et al72 2008	81%	89%	NP	5-point scale A cut-off value of ≥4 was used Not tested in the pre-hospital setting
LAMS	Hastrup, et al 201664	57%	84%	66%
FAST-ED	Lima, et al 63 2016	60%	89%	72%	9-point scale A cut-off value of ≥4 was used
PASS	Hastrup, et al64 2016	61%–66%	83%	66%–68%	3-point scale A cut-off value of ≥2 was used 2/3 of cohort used for derivation 1/3 of cohort used for validation