Table 2.
Characteristics of patients by mortality
| Characteristic | Alive (n=406) | Dead (n=126) | P |
|---|---|---|---|
| Age (years) | 40.7 | 48.5 | <0.001† |
| Sex (percentage male) | 77.1 | 73.8 | 0.449* |
| Race (%) | |||
| White | 67.2 | 70.6 | 0.389* |
| Black or African-American | 28.3 | 23.0 | |
| Other race | 4.4 | 6.4 | |
| Mechanism of injury (%) | |||
| Penetrating | 19.7 | 20.6 | 0.819* |
| Blunt | 80.3 | 79.4 | |
| Mean SBP (mmHg) (%) | 125.1 | 113.3 | 0.004† |
| SBP ≤90 (mmHg) (%) | 11.3 | 25.4 | <0.001* |
| Mean total hospital days | 13.5 | 4.9 | <0.001† |
| Mean total ICU days | 7.4 | 4.8 | <0.001† |
| Mean total ventilatory days | 5.4 | 4.5 | 0.143† |
| ISS >15 (%) | 60.1 | 88.1 | <0.001* |
| GCS ≤8 (%) | 62.1 | 78.6 | <0.001* |
| Mean INR (%) | 1.3 | 2.5 | <0.001† |
| INR >1.6 (%) | 3.9 | 29.4 | <0.001* |
| Mean ABG pH | 7.31 | 7.24 | <0.001† |
| ABG pH (%) | |||
| ≤7.0 | 1.0 | 11.9 | <0.001* |
| 7.0-7.2 | 8.9 | 22.2 | |
| 7.2-7.35 | 51.7 | 40.5 | |
| >7.35 | 38.4 | 25.4 | |
| Mean ABG BD | −4.0 | −6.5 | 0.003† |
| ABG BD (%) | |||
| ≤−8 | 20.2 | 37.3 | <0.001* |
| >−8 | 79.8 | 62.7 |
†t-test, *Pearson’s Chi-squared test. ED: Emergency department, ISS: Injury Severity Score, GCS: Glasgow Coma Scale, INR: International Normalized Ratio, ABG pH: Arterial blood gas pH, BD: Base deficit, ICU: Intensive care unit