Performance of CAPE mortality risk score in predicting 30-day mortality at different risk cut-offs in the prospective dataset
| 30-day mortality risk cut-off | CAPE mortality risk score | TP | TN | FP | FN | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
| ≥0.05 | ≥22.2 | 57 | 97 | 157 | 4 | 93.4 | 38.2 | 26.6 | 96.0 |
| ≥0.10 | ≥40.6 | 53 | 135 | 119 | 8 | 86.9 | 53.2 | 30.8 | 94.4 |
| ≥0.15 | ≥52.0 | 49 | 155 | 99 | 12 | 80.3 | 61.0 | 33.1 | 92.8 |
| ≥0.20 | ≥60.6 | 47 | 169 | 85 | 14 | 77.1 | 66.5 | 35.6 | 92.4 |
| ≥0.25 | ≥67.7 | 44 | 183 | 71 | 17 | 72.1 | 72.1 | 38.3 | 91.5 |
| ≥0.30 | ≥73.9 | 43 | 191 | 63 | 18 | 70.5 | 75.2 | 40.6 | 91.4 |
| ≥0.35 | ≥79.5 | 37 | 211 | 43 | 24 | 60.7 | 83.1 | 46.3 | 89.8 |
| ≥0.40 | ≥84.8 | 28 | 225 | 29 | 33 | 45.9 | 88.6 | 49.1 | 87.2 |
CAPE, community-acquired pneumonia artificial intelligence predictive engine; FN, false negative; FP, false positive; NPV, negative predictive value; PPV, positive predictive value; TN, true negative; TP, true positive.