Table 1. Comparison of demographic and clinical characteristics between survival and non-survival groups in the derivation cohort.
| Variables | Survivor n=13 562 |
Dead n=321 |
P value |
|---|---|---|---|
| Age, years (median IQR) | 12 (7–16) | 15 (8–16) | <0.001 |
| Patients age 0–6, n (%) | 2691 (2) | 60 (17) | <0.001 |
| Patients age 7–12, n (%) | 4396 (32) | 59 (18) | <0.001 |
| Patients age 13–17, n (%) | 6475 (47) | 202 (63) | <0.001 |
| Male, n (%) | 9736 (72) | 228 (71) | 0.765 |
| Blunt injury, n (%) | 13 337 (98) | 320 (99) | 0.059 |
| Injury region with AIS ≥3, n (%) | |||
| Head injury | 4395 (32) | 266 (88) | <0.001 |
| Facial injury | 116 (1) | 8 (2) | 0.002 |
| Neck injury | 21 (0.2) | 6 (2) | <0.001 |
| Chest injury | 2382 (18) | 183 (57) | <0.001 |
| Abdominal and pelvic injury | 683 (5) | 59 (18) | <0.001 |
| Spinal injury | 570 (4) | 21 (7) | 0.009 |
| Upper extremity injury | 1050 (8) | 12 (4) | 0.008 |
| Lower extremity injury | 2110 (16) | 71 (22) | 0.001 |
| rSIG, (median IQR) | 18.1 (14.0–22.1) | 3.7 (2.2–7.5) | <0.001 |
| Systolic blood pressure at hospital arrival, (median IQR) | 123 (111–136) | 105 (70–137) | <0.001 |
| Heart rate at hospital arrival, (median IQR) | 95 (81–111) | 119 (80–142) | <0.001 |
| Glasgow Coma Scale at hospital arrival, (median IQR) | 15 (14–15) | 3 (3–6) | <0.001 |
| Survival probability by TRISS methods, % (mean, IQR) | 99.3 (98.4–99.5) | 45.9 (17.5–78.5) | <0.001 |
AIS, Abbreviated Injury Scale; rSIG, revised Shock Index multiplied by the Glasgow Coma Scale; TRISS, Trauma and Injury Severity Score.