Baseline characteristics of on-scene time cohorts.
| Time cohort | % (n) | Mean | SD | |
| 0–10 min | Age (years) | 42.57 | 19.44 | |
| GCS | 13.85 | 3.28 | ||
| LOS (days) | 6.13 | 6.16 | ||
| ISS | 9.97 | 8.68 | ||
| Mortality | 3.90% (3) | |||
| 11–20 min | Age (years) | 38.8 | 17.19 | |
| GCS | 12.52 | 4.7 | ||
| LOS (days) | 6.77 | 8.86 | ||
| ISS | 13.65 | 13.46 | ||
| Mortality | 5.00% (6) | |||
| 21–30 min | Age (years) | 37.48 | 13.8 | |
| GCS | 10.39 | 5.53 | ||
| LOS (days) | 9.55 | 9.45 | ||
| ISS | 15.95 | 10.76 | ||
| Mortality | 9.00% (4) | |||
| 31–59 min | Age (years) | 39.52 | 15.16 | |
| GCS | 8.79 | 5.88 | ||
| LOS (days) | 8.25 | 8.1 | ||
| ISS | 16.54 | 11.04 | ||
| Mortality | 9.80% (5) |
GCS, Glasgow Coma Scale; ISS, Injury Severity Score; LOS, hospitallength of stay.