Table 4b.

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)
N (# of deaths)	5350 (148)	3320 (87)	2030 (61)
HT	1.27 (0.89 – 1.82)	1.49 (0.93 – 2.37)	1.07 (0.58 – 1.93)
GT	ref	ref	ref
Age (Years)	1.05 (1.04 – 1.06)	1.04 (1.03 – 1.06)	1.04 (1.02 – 1.05)
Penetrating Injury	2.10 (1.06 – 4.15)	2.86 (1.17 – 6.97)	˧
Any Pre-existing Condition	1.85 (1.30 – 2.63)	1.94 (1.21 – 3.10)	˧
TTC Initial GCS	0.88 (0.85 – 0.92)	0.89 (0.84 – 0.93)	0.87 (0.82 – 0.93)
TTC Final ISS	1.03 (1.02 – 1.05)	1.04 (1.01 – 1.06)	1.03 (1.01 – 1.05)
Severe Head Injury (AIS >=3)	1.90 (1.27 – 2.84)	1.94 (1.15 – 3.27)	1.77 (0.94 3.34)
Propensity Score	3.71 (1.16 – 11.94)	1.11 (0.22 – 5.58)	18.42 (3.15 – 107.62)

HR=Hazard Ratio

^*Excluding patients who died or were discharged within 3 days of admission

^{˧ =}dropped from model, p >0.1; TTC= Tertiary Trauma Center