Table 2.
Sensitivity, specificity, PPV, NPV, and overall accuracy of different scales.
| Scale | AUC | 95% CI | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Youden (%) | Accuracy (%) |
|---|---|---|---|---|---|---|---|---|
| mPASS ≥ 3 | 0.917 | 0.889–0.944 | 90.7 | 84.4 | 84.3 | 90.8 | 75.1 | 87.4 |
| Pass ≥ 2 | 0.878 | 0.833–0.916 | 94.5 | 83.9 | 84.4 | 94.4 | 78.5 | 89.0 |
| NIHSS ≥ 9 | 0.944 | 0.921–0.967 | 92.9 | 84.9 | 84.1 | 92.3 | 77.8 | 88.7 |
mPASS: modified Prehospital Acute Stroke Severity; PASS: Prehospital Acute Stroke Severity; NIHSS: National Institutes of Health Stroke Scale; AUC: area under the curve; CI: confidence interval; PPV: positive predictive value; NPV: negative predictive value.