Hospital and ICU characteristics
| Variables | Levels | n/Median | %/IQR |
| Hospital size | <250 beds | 2 | 4.08% |
| 250–499 beds | 16 | 32.65% | |
| 500–749 beds | 18 | 36.73% | |
| 750–999 beds | 7 | 14.29% | |
| ≥1000 beds | 6 | 12.24% | |
| State trauma center designation | Level 1 | 45 | 91.84% |
| Level 2 | 4 | 8.16% | |
| American College of Surgeons verified | No | 10 | 20.41% |
| Yes | 39 | 79.59% | |
| Urban | 48 | 97.95% | |
| Rural | 1 | 2.04% | |
| University | 29 | 59.1% | |
| Non-university | 20 | 40.8% | |
| Geographic location | Northeast | 10 | 20.4% |
| Southeast | 9 | 18.3% | |
| Midwest | 8 | 16.3% | |
| Southwest | 9 | 18.3% | |
| West | 13 | 26.5% | |
| Adult ICU beds, n | 70 | (53–102) | |
| Pediatric ICU beds, n | 30 | (0–73) | |
| Total ICU beds, n | 105 | (64–181) | |
| Number of trauma patients evaluated as a formal ‘trauma activation’ per year | <1000 | 5 | 10.20% |
| 1000–1999 | 15 | 30.61% | |
| 2000–2999 | 13 | 26.53% | |
| 3000–3999 | 5 | 10.20% | |
| ≥4000 | 11 | 22.45% |
ICU, intensive care unit.