. Author manuscript; available in PMC: 2017 Feb 1.

Published in final edited form as: J Trauma Acute Care Surg. 2016 Feb;80(2):308–312. doi: 10.1097/TA.0000000000000903

Table 3. Multivariable Cox Proportional Hazards Model of Risk Factors of ARDS.

	HR	95% Confidence Interval	P value
Transfusion threshold <10 g/dL	1.14	0.65-2.01	0.648
Male sex	3.69	0.88-15.38	0.073
Apache II ≤16 (reference)
(16-20]	0.54	0.20-1.41	0.206
(20-25]	1.47	0.64-3.38	0.364
>25	2.73	1.21-6.14	0.015
Abbreviated Injury Severity Score	1.02	0.97-1.06	0.474
Surgery on Admission	0.69	0.36-1.33	0.268
Pre-hospital Hypoxia	2.08	1.13-3.83	0.018
Pre-hospital Hypotension	0.42	0.18-0.99	0.048
Abbreviated Injury Severity - Thorax	1.25	0.59-2.67	0.565