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. Author manuscript; available in PMC: 2023 Apr 1.
Published in final edited form as: J Neurointerv Surg. 2021 Apr 23;14(4):341–345. doi: 10.1136/neurintsurg-2020-017217

Table 2.

Validity and predictive values of ED and EMS VAN

ED VAN (N=1,547) EMS VAN (N=623)
LVO Diag. LVO or ICH Diag. LVO Diag. LVO or ICH Diag.
Prevalence of Diag. 9%1 17% 12%2 22%
Sensitivity 0.72 (0.64–0.79) 0.69 (0.63–0.74) 0.84 (0.76–0.92) 0.76 (0.69–0.83)
Specificity 0.74 (0.72–0.76) 0.78 (0.76–0.80) 0.68 (0.64–0.72) 0.72 (0.68–0.76)
Positive Predictive Value 0.21 (0.18–0.25) 0.39 (0.35–0.44) 0.26 (0.21–0.32) 0.44 (0.37–0.50)
Negative Predictive Value 0.96 (0.95–0.98) 0.92 (0.91–0.94) 0.97 (0.95–0.99) 0.91 (0.89–0.94)
1

25% prevalence of LVO diagnosis among ischemic strokes

2

29% prevalence of LVO diagnosis among ischemic strokes