Triage tool diagnostic accuracy statistics (95% CI) for predicting death within 30 days
| Tool | N* | n (%) 30 days of death† | C-statistic | Threshold | n (%) above threshold | Sensitivity | Specificity | PPV | NPV |
| CRB-65 | 7469 | 1055 (14) | 0.84 (0.83 to 0.85) | >0 | 4010 (54) | 0.95 (0.95 to 0.96) | 0.53 (0.53 to 0.54) | 0.25 (0.25 to 0.26) | 0.99 (0.98 to 0.99) |
| NEWS2 | 7433 | 1055 (14) | 0.78 (0.77 to 0.80) | >1 | 5574 (75) | 0.95 (0.95 to 0.96) | 0.28 (0.28 to 0.29) | 0.18 (0.18 to 0.18) | 0.97 (0.97 to 0.98) |
| PMEWS | 7460 | 1050 (14) | 0.81 (0.80 to 0.83) | >2 | 5352 (72) | 0.98 (0.98 to 0.98) | 0.32 (0.32 to 0.33) | 0.19 (0.19 to 0.20) | 0.99 (0.99 to 0.99) |
| PRIEST | 7471 | 1055 (14) | 0.85 (0.84 to 0.86) | >4 | 4932 (66) | 0.98 (0.97 to 0.98) | 0.39 (0.39 to 0.40) | 0.21 (0.20 to 0.21) | 0.99 (0.99 to 0.99) |
| WHO | 7471 | 1055 (14) | 0.65 (0.64 to 0.65) | >0 | 5539 (74) | 0.99 (0.99 to 1.00) | 0.30 (0.30 to 0.30) | 0.19 (0.19 to 0.19) | 1.00 (1.00 to 1.00) |
*Patients with less than three parameters were excluded from analysis when estimating performance.
†Totals rounded to nearest 5.
NEWS2, National Early Warning Score, version 2; NPV, negative predictive value; PPV, positive predictive value.