Table 3

Comparison of various published clinical scales with RF model to predict LVO in the test set

Cut-offAUC (95% CI)SENSPEAccuracy
RF—0.831 (0.819 to 0.843)0.7210.8270.772
mNIHSS≥70.809 (0.795 to 0.824)0.7600.7550.769
sNIHSS-EMS≥60.809 (0.795 to 0.824)0.7220.7880.764
NIHSS≥60.806 (0.792 to 0.820)0.7270.7920.708
RACE≥50.806 (0.791 to 0.821)0.7120.7930.764
CPSSS≥20.804 (0.789 to 0.819)0.6580.8260.761
FAST-ED≥40.804 (0.790 to 0.819)0.6110.8500.760
s-NIHSS-5≥40.804 (0.790 to 0.819)0.7380.7630.760
3I-SS≥40.798 (0.782 to 0.813)0.6410.8520.759
LAMS≥40.779 (0.764 to 0.795)0.6520.8080.746
PASS≥20.778 (0.763 to 0.794)0.6600.8230.751
s-NIHSS-1≥20.773 (0.757 to 0.789)0.6980.7610.695
FPSS≥50.762 (0.746 to 0.778)0.7810.6200.711
G-FAST≥30.755 (0.740 to 0.771)0.7630.6530.697
VAN≥20.732 (0.715 to 0.748)0.8470.5340.650
ROSIER≥40.730 (0.714 to 0.746)0.8860.4670.694
FAST≥30.706 (0.690 to 0.723)0.6820.6810.685
aNIHSS≥10.689 (0.672 to 0.706)0.5420.7510.416

  • aNIHSS, abbreviated NIHSS; AUC, area under the curve; CPSSS, Cincinnati Pre-hospital Stroke Severity scale; EMS, emergency medical services; FAST-ED, Field Assessment Stroke Triage for Emergency Destination scale; FPSS, Finnish Prehospital Stroke Scale; G-FAST, gaze–face–arm–speech–time test; 3I-SS, three-item Stroke Scale; LAMS, Los Angeles Motor Scale; LVO, large vessel occlusion stroke; mNIHSS, modified NIHSS; NIHSS, National Institutes of Health Stroke Scale; PASS, Pre-hospital Acute Stroke Severity scale; RACE, Rapid Arterial Occlusion Evaluation Scale; RF, random forests; ROSIER, Recognition of Stroke in the Emergency Room; SEN, sensitivity; sNIHSS, shortened versions of the NIHSS; SPE, specificity; VAN, stroke vision, aphasia, neglect assessment.