Table 1

Baseline characteristics and assessment of randomization

Variable	All patients (n=1427)		Derivation (n=707)			Validation (n=720)
Variable	n	Median or %	n	Median or %	n	Median or %	P value
Age	1427	35 years	707	35 years	720	36 years	0.24
Sex
Male	1160	81.2%	569	80.5%	591	81.9%	0.51
Female	269	18.8%	138	19.5%	131	18.1%	0.51
Body mass index	1083	26.0	532	25.8	561	26.0	0.59
Race
Caucasian/Latino	783	54.8%	385	54.5%	398	55.1%	0.97
Black	339	23.7%	166	23.5%	173	24.0%
Asian	185	13.0%	95	13.4%	90	12.5%
Pacific Islander	9	0.6%	5	0.7%	4	0.6%
Native American	8	0.6%	4	0.6%	4	0.6%
Other	36	2.5%	20	2.8%	16	2.2%
Unknown	69	4.8%	32	4.5%	37	5.1%
Injury Severity Score	1389	14.0	689	13.0	700	14.0	0.24
Blunt injury	801	56.3%	383	54.3%	418	58.1%	0.15
Traumatic brain injury	519	36.4%	248	35.2%	271	37.6%	0.34
Mortality at 28 days	253	17.7%	117	16.6%	136	18.8%	0.26