Table 1.

Patient characteristics of 44,947 ED trauma encounters from January 1, 2014, to December 31, 2015, with cohorts stratified into pre- and postintervention groups.

Patient Characteristics	Preintervention (January 1, 2014, to May 14, 2015) (n=28,751)		Postintervention (May 15, 2015, to December 31, 2015) (n=16,196)		Total (n=44,947)
	No.	%	No.	%	No.	%
Age, mean (SD)	58.99	(23.39)	58.64	(23.01)	58.86	(23.25)
Women	15,275	53.13	8,832	54.53	24,107	53.63
Ethnicity
Asian	2,078	7.23	1,148	7.09	3,226	7.18
Black	3,099	10.78	1,810	11.18	4,909	10.92
Hispanic	9,389	32.66	5,402	33.35	14,791	32.91
White	13,728	47.75	7,561	46.68	21,289	47.36
Other	457	1.59	275	1.70	732	1.63
Marital status
Partnered	12,159	42.29	7,082	43.73	19,241	42.81
Nonpartnered	15,922	55.38	8,707	53.76	24,629	54.80
Other/unknown	670	2.33	407	2.51	1,077	2.40
Poverty*†	3,032	10.55	1,690	10.43	4,722	10.51
Completed high school†	23,735	82.55	13,054	80.60	36,789	81.85
Elixhauser score, mean (SD)	2.21	(1.70)	2.10	(1.72)	2.17	−1.71
Arrived by ambulance	9,953	34.62	5,398	33.33	15,351	34.15
Vomiting	1,560	5.43	789	4.87	2,349	5.23
Prescribed anticoagulants	3,811	13.26	2,223	13.73	6,034	13.42
GCS score <15	3,085	10.73	1,744	10.77	4,829	10.74
Alcohol intoxication	449	1.56	214	1.32	663	1.48

Percentages are column percentages.

^*Based on poverty income limits for a 4-person household ($34,575).

^†Based on population-based geocoding data at the census-track level, defined by patient address at the encounter.