Table 6.

Final Multiple Variable Cox Proportional Hazard Model

Characteristic	HR (95% CI)	P-value
Age at trauma, per 10 years	1.4 (1.3, 1.5)	<0.001
Male sex	2.1 (1.4, 3.1)	<0.001
Current or former tobacco smoker	1.4 (0.99, 2.1)	0.054
Trauma Mortality Prediction Model (TMPM), per 10 % increase	1.9 (1.6, 2.2)	<0.001
Prior superficial vein thrombosis	2.7 (1.5, 4.8)	<0.001
Any non-hospital related immobility prior to trauma	2.4 (1.5, 3.7)	<0.001
Soft tissue injury, leg	1.9 (1.2, 3.1)	0.009
Mechanical prophylaxis	1.4 (0.8, 2.4)	0.270
Chemoprophylaxis	0.8 (0.5, 1.3)	0.333