Table 1.
Patient Demographics, Injury Characteristics and Outcomes: Direct Scene vs. Interfacility Transfer HEMS
| Scene HEMS (n=53,541) | Interfacility HEMS (n=32,031) | p-value | |
|---|---|---|---|
| Age | 41 (25, 57) | 50 (31, 71) | <0.001 |
| Sex (male) | 37433 (69.9%) | 21563 (67.3%) | <0.001 |
| ISS | 14 (9, 24) | 13 (8, 21) | <0.001 |
| ISS ≤15 | 28401 (53.4%) | 18102 (57.0%) | <0.001 |
| AIS ≥3 (any system) | 38025 (71.0%) | 22210 (69.3%) | <0.001 |
| Multisystem trauma* | 4907 (9.2%) | 1370 (4.3%) | <0.001 |
| Rural injury | 26578 (54.7%) | 15709 (65.5%) | <0.001 |
| Distance (miles) | 25.7 (17.3, 36.7) | 40.8 (25.2, 64.6) | <0.001 |
| Prehospital time (mins) | 52 (42, 63) | 214 (150, 292) | <0.001 |
| HEMS overtriage | 2962 (5.5%) | 3795 (11.8%) | <0.001 |
| Mortality | 4692 (8.8%) | 2745 (8.6%) | 0.330 |
Continuous variables presented as median (IQR)
Categorical variables presented as n (%)
ISS, injury severity score; AIS, abbreviated injury score; HEMS, helicopter emergency medical services.
*
Three or more anatomic body regions injured