Triage tool diagnostic accuracy statistics (95% CI) for predicting any adverse outcome (Omicron period)
| Tool | N* | C-statistic | Threshold | N (%) above threshold | Sensitivity | Specificity | PPV | NPV |
| CRB-65 | 136 961 | 0.69 (0.68, 0.70) | >0 | 31 373 (22.9%) | 0.59 (0.57, 0.60) | 0.78 (0.78, 0.78) | 0.05 (0.05, 0.05) | 0.99 (0.99, 0.99) |
| NEWS2 | 137 116 | 0.77 (0.76, 0.78) | >1 | 79 487 (58%) | 0.87 (0.86, 0.88) | 0.43 (0.42, 0.43) | 0.03 (0.03, 0.03) | 0.99 (0.99, 0.99) |
| PMEWS | 138 954 | 0.75 (0.74, 0.76) | >2 | 60 990 (43.9%) | 0.81 (0.79, 0.82) | 0.57 (0.57, 0.57) | 0.04 (0.04, 0.05) | 0.99 (0.99, 0.99) |
| PRIEST | 138 982 | 0.78 (0.77, 0.79) | >4 | 48 134 (34.6%) | 0.75 (0.74, 0.77) | 0.66 (0.66, 0.66) | 0.04 (0.04, 0.04) | 0.99 (0.99, 0.99) |
| WHO | 138 666 | 0.62 (0.61, 0.63) | >0 | 78 355 (56.5%) | 0.73 (0.71, 0.75) | 0.44 (0.44, 0.44) | 0.03 (0.02, 0.03) | 0.99 (0.99, 0.99) |
| TEWS | 136 967 | 0.70 (0.69, 0.71) | >2 | 72 750 (53.1%) | 0.77 (0.75, 0.78) | 0.47 (0.47, 0.48) | 0.03 (0.03, 0.03) | 0.99 (0.99, 0.99) |
| Quick COVID | 140 520 | 0.74 (0.73, 0.75) | >3 | 8529 (6.1%) | 0.42 (0.41, 0.44) | 0.95 (0.95, 0.95) | 0.14 (0.13, 0.15) | 0.99 (0.99, 0.99) |
*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.