Table 2. Patient characteristics.
| Characteristic | Derivation Phase (n = 6,002) | Validation Phase (n = 5,475) |
|---|---|---|
| Male gender: number (percent) | 3,583 (59.7) | 3,384 (61.8) |
| Age: median (IQR) | 46 (29–62) | 45 (28–61) |
| Mechanism of injury: number (percent) | ||
| MVA | 2,141 (35.7) | 1,945 (35.5) |
| Fall | 1,781 (29.7) | 1,368 (25.0) |
| MCA | 466 (7.8) | 594 (10.8) |
| PMV | 498 (8.3) | 543 (9.9) |
| GCS: median (IQR) | 15 (14–15) | 15 (14–15) |
| Admitted to hospital: number (percent) | 2,768 (46.1) | 2,733 (49.9) |
| Survived to hospital discharge if admitted: number (percent) | 2,599 (93.9) | 2,575 (94.2) |
| Hospital LOS in days: median (IQR) | 3 (1–5) | 3 (1–5) |
| ISS: median (IQR) * | 5 (1–10) | 5 (1–10) |
See Fig 1 for study enrollment.
*Injury severity score assessment was performed in 8,152/11,477 patients—other patients had no (or very minor) injuries and were discharged from the ED.
GCS, Glasgow Coma Scale; ISS, injury severity score; LOS, length of stay; MCA, motorcycle accident; MVA, motorized vehicle accident; PMV, pedestrian struck by motorized vehicle.