. Author manuscript; available in PMC: 2018 Jan 1.

Published in final edited form as: J Trauma Acute Care Surg. 2017 Jul;83(1 Suppl 1):S83–S91. doi: 10.1097/TA.0000000000001484

Table 4.

Results of primary and sensitivity analyses

	Primary Analysis			Sensitivity Analysis
	Propensity Score^a adjusted GEE (n=109)			Logistic Regression (N=1030)			Cox Regression (N=1020)
Mortality	Odds ratio	95% CI	P- value	Odds ratio	95% CI	P- value	Hazard ratio	95% CI	P- value
3-hour	0.74	(0.24, 2.26)	0.60	1.69^b	(0.88, 3.26)	0.12	1.40^e	(0.82, 2.39)	0.22
24-hour	0.74	(0.25, 2.17)	0.58	0.83^c	(0.44, 1.57)	0.56	1.12^f	(0.41, 3.06)	0.83
30-day	0.85	(0.32, 2.28)	0.75	0.75^d	(0.40, 1.42)	0.38	1.97^g	(0.81, 4.79)	0.13

GEE Generalized Estimating Equations; CI Confidence Interval

Propensity score included: age, gender, race, injury severity score (ISS), systolic blood pressure, diastolic blood pressure, pulse, whether or not the patient satisfied more than one of the highest risk criteria, presence of any penetrating injury, use of a prehospital lifesaving intervention, time from the air team call time to arrival at the emergency department (ED), if the bleeding site was identified prehospital, and site volume.

Adjusted for age, race, gender, systolic blood pressure, and having a prehospital lifesaving intervention

Adjusted for age, race, gender, systolic blood pressure, satisfying more than one high risk criteria, having any penetrating injury, having a prehospital lifesaving intervention, and ISS.

Adjusted for age, race, gender, pulse, minutes form the air team call time to arrival at the ED, satisfying more than one high risk criteria, having a prehospital lifesaving intervention, having the bleeding source identified prehospital and ISS.

Adjusted for age, race, gender, systolic blood pressure and having a prehospital lifesaving intervention

Adjusted for age, race, gender, systolic blood pressure, bleeding source identified prehospital, having a prehospital lifesaving intervention, ISS, and survival time interactions with systolic blood pressure, ISS, and prehospital blood transfusion

Adjusted for age, race, gender, pulse satisfying more than one high risk criteria, use of a lifesaving intervention, having bleeding source identified prehospital, ISS, and time interactions with pulse, selected more than one high risk criteria, ISS, and prehospital blood transfusion