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Prediction performance of COVID-19 with different cut-off values
| Cut-off | TP | FP | TN | FN | Youden Index | Sensitivity (95%CI) | Specificity (95%CI) | PPV (95%CI) | NPV (95%CI) |
|---|---|---|---|---|---|---|---|---|---|
| > 4 | 17 | 2 | 41 | 13 | 0.5202 | 56.67 (37.4 to 74.5) | 95.35 (84.2 to 99.4) | 89.5 (67.9 to 97.2) | 75.9 (67.6–82.7) |
| > 2 | 26 | 14 | 29 | 4 | 0.5411 | 86.67 (69.3 to 96.2) | 67.44 (51.5 to 80.9) | 65.0 (54.2–74.5) | 87.9 (74.0–94.9) |
| > 0 | 30 | 33 | 10 | 0 | 0.2326 | 100.0 (88.4 to 100.0) | 23.26 (11.8 to 38.6) | 47.6 (43.5–51.7) | 100.0 (−) |
