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Table 2 Injury distribution and injury severity

From: Survival benefit of helicopter emergency medical services compared to ground emergency medical services in traumatized patients

Number of patients with AIS ≥3 HEMS GEMS P-value
Head 48.2% 47.5% 0.423
Chest 54.4% 47.9% <0.001
Abdomen 17.2% 15.3% 0.004
Extremities 39.1% 33.3% <0.001
ISS    
(mean ± SD) 26.0 ± 13.8 23.7 ± 13.1  
(median (IQR 25 to 75)) 24 (16 to 34) 21 (14 to 29) <0.001