Table 4a.

Propensity-Adjusted Multivariable Analyses of the Impact of Inter-facility Mode of Transport on 2-Week Mortality in Trauma Patients Transferred to Tertiary Trauma Centers

Variable	Overall 2-Week Mortality HR (95% CI)	2-Week Mortality 21 – 90 Miles HR (95% CI)	2-Week Mortality >90 Miles HR (95% CI)
HT	0.95 (0.77 – 1.18)	0.90 (0.69 – 1.18)	1.28 (0.86 – 1.92)
GT	ref	ref	ref
Age (Years)	1.03 (1.02 – 1.04)	1.04 (1.03 – 1.06)	1.03 (1.02 – 1.03)
Penetrating Injury	2.32 (1.71 – 3.15)	2.86 (1.89 – 4.32)	1.78 (1.12 – 2.81)
Any Pre-existing Condition	1.27 (1.03 – 1.57)	˧	˧
TTC Initial GCS	0.81 (0.79 – 0.83)	0.80 (0.77 – 0.82)	0.83 (0.80 – 0.87)
TTC Final ISS	1.03 (1.02 – 1.05)	1.03 (1.02 – 1.04)	1.04 (1.02 – 1.05)
Severe Head Injury (AIS >=3)	1.62 (1.23 – 2.09)	1.59 (1.15 – 2.22)	1.54 (1.03 – 2.29)
Propensity Score	7.04 (3.65 – 13.58)	3.92 (1.70 – 9.03)	22.23 (7.50 – 66.16)

HR=Hazard Ratio

^{˧ =}dropped from model, p >0.05; TTC= Tertiary Trauma Center