Table 2.
Unadjusted mortality rates and odds ratios for death in the derivation dataset
| Variable | Level or coded value | Deaths/Patients | Mortality (%) | Odds ratio (95% CI) |
|---|---|---|---|---|
| Gender | Male | 289/3846 | 7.5 | * |
| Female | 135/1517 | 8.9 | 1.20 (0.97–1.49) | |
| ASA-PS | 1 | 214/3987 | 5.4 | * |
| 2 | 98/917 | 10.7 | 2.11 (1.64–2.71) | |
| 3 or 4 | 112/459 | 24.4 | 5.69 (4.42–7.33) | |
| Injury | Blunt | 382/4874 | 7.8 | * |
| mechanism | Penetrating | 42/489 | 8.6 | 1.10 (0.79–1.54) |
| Intubated | No | 184/4378 | 4.2 | * |
| Yes | 240/985 | 24.4 | 7.34 (5.97–9.03) | |
| SBP | 4 (> 89) | 300/5111 | 5.9 | * |
| 3 (76–89) | 21/93 | 22.6 | 4.68 (2.84–7.71) | |
| 2 (50–75) | 45/95 | 47.4 | 14.4 (9.49–22.0) | |
| 0 or 1 (0–49) | 58/64 | 90.6 | 155 (66.4–362) | |
| RR | 4 (10–29) | 244/4872 | 5.0 | * |
| 3 (> 29) | 61/277 | 22.0 | 5.36 (3.92–7.32) | |
| 1 or 2 (1–9) | 56/144 | 38.9 | 12.1 (8.43–17.3) | |
| 0 (0) | 63/70 | 90.0 | 170 (77.4–377) | |
| GCS score | 4 (13–15) | 89/4074 | 2.2 | * |
| 3 (9–12) | 39/421 | 9.3 | 4.57 (3.09–6.76) | |
| 2 (6–8) | 49/379 | 12.9 | 6.65 (4.61–9.59) | |
| 1 (4–5) | 63/191 | 33.0 | 22.0 (15.3–31.8) | |
| 0 (3) | 184/298 | 61.7 | 72.3 (52.8–98.9) |
*
Reference categories.
Categorical and coded variables in the derivation dataset, comprising 5363 patients.
ASA-PS, pre-injury American Society of Anesthesiologists Physical Status Classification; Intubated, tracheal intubation performed prior to admission; SBP, systolic blood pressure (mmHg); RR, respiratory rate (breaths/min); GCS, Glascow Coma Scale.