Table 4.

Odds of death for HEMS versus GEMS transport to hospital for major trauma

Criteria	OR of death	95% CI	P value
Entire matched cohort (9272)	0.846	0.684 to 1.046	0.122
Prehospital GCS ≤8
Present (1417)	0.733	0.508 to 1.059	0.098
Absent (7855)	1.150	0.862 to 1.534	0.340
Prehospital respiratory rate <10 or >29
Present (1007)	0.760	0.498 to 1.161	0.204
Absent (8265)	0.894	0.692 to 1.156	0.393
Prehospital hemorrhagic shock (SBP <90)
Present (596)	0.330	0.078 to 1.391	0.165
Absent (8676)	0.944	0.753 to 1.183	0.615

GCS, Glasgow Coma Scale; GEMS, ground emergency medical services; HEMS, helicopter emergency medical services; SBP, systolic blood pressure.