Triage tool diagnostic accuracy statistics (95% CI) for predicting any adverse outcome (entire study period)
| Tool | N* | C-statistic | Threshold | N (%) above threshold | Sensitivity | Specificity | PPV | NPV |
| CRB-65 | 432 580 | 0.70 (0.70, 0.71) | >0 | 102 964 (23.8%) | 0.61 (0.60, 0.62) | 0.78 (0.77, 0.78) | 0.09 (0.09, 0.09) | 0.98 (0.98, 0.98) |
| NEWS2 | 433 079 | 0.80 (0.79, 0.80) | >1 | 258 643 (59.7%) | 0.90 (0.90, 0.91) | 0.41 (0.41, 0.42) | 0.05 (0.05, 0.05) | 0.99 (0.99, 0.99) |
| PMEWS | 438 806 | 0.79 (0.79, 0.79) | >2 | 202 335 (46.11 %) | 0.86 (0.85, 0.87) | 0.55 (0.55, 0.55) | 0.06 (0.06, 0.07) | 0.99 (0.99,0.99) |
| PRIEST | 438 876 | 0.82 (0.82, 0.82) | >4 | 163 649 (37.3%) | 0.83 (0.83, 0.84) | 0.64 (0.64,0.64) | 0.08 (0.08, 0.08) | 0.99 (0.99, 0.99) |
| WHO | 437 846 | 0.71 (0.71, 0.72) | >0 | 253 355 (57.9%) | 0.84 (0.83, 0.84) | 0.43 (0.43, 0.43) | 0.05 (0.05, 0.05) | 0.99 (0.99, 0.99) |
| TEWS | 432 606 | 0.68 (0.68, 0.69) | >2 | 237 482 (31%) | 0.75 (0.74, 0.76) | 0.46 (0.46, 0.46) | 0.05 (0.05, 0.05) | 0.98 (0.98, 0.98) |
| Quick COVID | 446 084 | 0.78 (0.78, 0.79) | >3 | 36 634 (8.2) | 0.45 (0.45, 0.47) | 0.93 (0.93, 0.93) | 0.19 (0.19, 0.20) | 0.98 (0.98, 0.98) |
*Patients with <3 parameters were excluded from analysis when estimating performance.
CRB-65, Confusion Respiratory Rate Blood Pressure Age≥65; NEWS2, National Early Warning Score, version 2 ; NPV, negative predictive value; PMEWS, Pandemic Medical Early Warning Score ; PPV, positive predictive value; PRIEST, Pandemic Respiratory Infection Emergency System Triage; TEWS, Triage Early Warning Score .