Triage tool diagnostic accuracy statistics (95% CI) for predicting death (entire study period)
| Tool | N* | C-statistic | Threshold | N (%) above threshold | Sensitivity | Specificity | PPV | NPV |
| CRB-65 | 432 580 | 0.70 (0.69, 0.70) | >0 | 102 964 (23.8%) | 0.60 (0.59, 0.61) | 0.77 (0.77, 0.77) | 0.06 (0.06, 0.06) | 0.99 (0.99, 0.99) |
| NEWS2 | 433 079 | 0.78 (0.78, 0.79) | >1 | 258 643 (59.7) | 0.89 (0.89, 0.90) | 0.41 (0.41, 0.41) | 0.04 (0.04, 0.04) | 0.99 (0.99, 0.99) |
| PMEWS | 438 806 | 0.81 (0.80, 0.81) | >2 | 202 335 (46.11%) | 0.88 (0.87, 0.89) | 0.55 (0.55, 0.55) | 0.05 (0.05, 0.05) | 0.99 (0.99, 0.99) |
| PRIEST | 438 876 | 0.83 (0.83, 0.83) | >4 | 163 649 (37.3%) | 0.85 (0.85, 0.86) | 0.64 (0.64, 0.64) | 0.06 (0.06, 0.06) | 0.99 (0.99, 0.99) |
| WHO | 437 846 | 0.79 (0.79, 0.80) | >0 | 253 355 (57.9%) | 0.94 (0.94, 0.95) | 0.43 (0.43, 0.43) | 0.04 (0.04, 0.04) | 0.996 (0.996, 0.997) |
| TEWS | 432 606 | 0.65 (0.65, 0.66) | >2 | 237 482 (54.9%) | 0.72 (0.72, 0.73) | 0.46 (0.45, 0.46) | 0.03 (0.03, 0.03) | 0.99 (0.99, 0.99) |
| Quick COVID | 446 084 | 0.76 (0.75, 0.76) | >3 | 36 634 (8.2%) | 0.36 (0.35, 0.37) | 0.93 (0.92, 0.93) | 0.11 (0.11, 0.11) | 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 .