Table 3.

Propensity-Adjusted Multivariable Analyses of the Impact of Inter-facility Mode of Transport on 72-hour Mortality in Trauma Patients Transferred to Tertiary Trauma Centers

Variable	Overall 72-hour Mortality HR (95% CI)	72-hour Mortality 21 – 90 Miles HR (95% CI)	72-hour Mortality >90 Miles HR (95% CI)
HT	0.79 (0.61-1.03)	0.65 (0.48-0.90)	1.49(0.86-2.60)
GT	ref	ref	ref
Male Gender	0.7 (0.54 – 0.91)	0.65 (0.47 – 0.91)	˧
Penetrating Injury	1.99 (1.41-2.80)	2.03 (1.29-3.18)	2.07(1.21- 3.54)
Any Pre-existing Condition	1.37 (1.05- 1.78)	1.36 (0.98 – 1.89)	1.48(0.95-2.31)*
TTC Initial ED SBP	0.98 (0.97-0.99)	0.98 (0.97-0.99)	0.976(0.971-0.981)
TTC Initial GCS	0.75 (0.72-0.78)	0.72 (0.68 – 0.76)	0.90 (0.75-0.86)
TTC Final ISS	1.02 (1.01- 1.03)	1.02 (1.00-1.03)	1.03(1.02-1.04)
Severe Head Injury (AIS >=3)	2.33(1.69 – 3.21)	2.35 (1.55-3.57)	2.25 (1.35-3.74)
Propensity Score	3.16 (1.43-6.97)	1.26 (0.45 – 3.49)	15.60(4.05-60.15)

HR=Hazard Ratio

^{˧ =}dropped from model, p >0.05

^*p=0.08

TTC= Tertiary Trauma Center