Table 3. Comparison of predictive accuracy of rSIG and TRISS for in-hospital survival in the validation cohort.
| No. of patients | Optimal cut-off point |
Sensitivity, % | Specificity, % | PPV, % | NPV, % | AUC (95% CI) |
P value | |
|---|---|---|---|---|---|---|---|---|
| All paediatric patients | ||||||||
| rSIG | 2814 | 10.1 | 89.3 | 82.1 | 99.7 | 9.8 | 0.857 (0.796 to 0.918) | 0.006 |
| Survival probability by TRISS methods | 2814 | 50.0 | 99.3 | 48.7 | 99.3 | 50.0 | 0.740 (0.661 to 0.820) | |
| Patients age 0–6 | ||||||||
| rSIG | 576 | 7.9 | 89.5 | 80.0 | 99.8 | 2.9 | 0.836 (0.640 to 1.000) | 0.699 |
| Survival probability by TRISS methods | 576 | 50.0 | 99.4 | 60.0 | 99.7 | 50.0 | 0.797 (0.557 to 1.000) | |
| Patients age 7–12 | ||||||||
| rSIG | 908 | 11.0 | 91.1 | 91.7 | 99.9 | 15.7 | 0.914 (0.831 to 0.996) | 0.033 |
| Survival probability by TRISS methods | 908 | 50.0 | 99.6 | 41.7 | 99.2 | 55.6 | 0.706 (0.560 to 0.852) | |
| Patients age 13–17 | ||||||||
| rSIG | 1330 | 11.9 | 88.2 | 86.4 | 99.6 | 14.5 | 0.873 (0.799 to 0.947) | 0.016 |
| Survival probability by TRISS methods | 1330 | 50.0 | 99.1 | 50.0 | 99.2 | 47.8 | 0.745 (0.638 to 0.852) |
AUC, area under the curve; NPV, negative predictive value; PPV, positive predictive value; rSIG, revised Shock Index multiplied by the Glasgow Coma Scale; TRISS, Trauma and Injury Severity Score.