Table 3.

Demographic and clinical characteristics of patients evaluated for TBI according to mechanism of injury

	Fall	MVC	Other Vehicle	Struck by/against	Assault	Sports	Other injury	p- Value
Age categories								<0.001
• Less than 5	17.1	3.5	6.4	17.6	1.1	12.0	5.2
• 5 – 9	4.5	3.5	11.8	13.8	0.5	11.7	3.0
• 10 – 14	2.7	3.5	14.9	10.5	6.1	28.2	11.5
• 15 – 19	3.4	13.7	14.2	15.8	15.7	24.1	10.8
• 20 – 24	2.5	18.6	6.5	5.4	22.8	8.0	12.5
• 25 – 34	4.8	15.3	7.4	9.6	25.6	7.1	18.0
• 35 – 44	5.2	13.9	13.0	10.3	11.5	4.4	12.1
• 45 – 54	7.9	11.7	3.2	5.0	9.8	4.1	11.7
• 55 – 64	10.5	8.7	15.9	5.2	5.3	0.0	5.0
• 65 – 74	11.7	3.5	2.9	3.9	0.1	0.0	4.6
• 75 and older	29.7	4.1	3.8	2.8	1.4	0.5	5.6
Race								<0.001
• Caucasian, non- Hispanic	72.9	61.3	71.1	61.5	58.1	82.7	63.7
• African-American, non-Hispanic	12.3	22.9	11.0	17.7	18.2	7.3	23.1
• Hispanic	11.9	12.1	17.4	15.9	18.9	7.0	5.7
• Other	2.9	3.8	0.5	4.9	4.7	3.0	7.5
Insurance								<0.001
• Medicare/Medicaid	56.9	26.4	28.6	32.9	29.3	22.6	35.7
• Private	31.1	38.9	48.6	42.7	25.9	63.9	24.9
• Other Insurance	3.0	11.3	11.3	8.1	7.6	3.4	10.9
• No insurance	9.0	23.4	11.5	16.4	37.3	10.0	28.5
% below poverty in patient’s zip code								<0.001
• <5%	21.4	17.0	17.4	17.7	8.5	36.9	19.4
• 5.0 – 9.9%	30.2	27.4	34.1	34.1	23.7	30.1	17.3
• 10.0 – 19.9%	33.0	32.7	26.7	25.0	43.7	31.3	40.6
• ≥20%	15.4	22.9	21.8	23.3	24.1	1.7	22.7
Triage status								<0.001
• Immediate	2.9	5.6	4.7	0.3	2.6	0.8	6.1
• Emergent	14.9	16.5	27.6	9.8	10.7	3.0	12.1
• Urgent	48.4	41.4	43.2	38.5	41.2	33.8	45.1
• Semi-urgent	26.8	28.7	17.9	44.9	38.3	56.4	29.8
• Non-urgent	3.2	4.4	2.3	2.3	5.3	1.7	3.3
• No triage	3.8	3.3	4.3	4.2	1.9	4.3	3.6
Arrived by ambulance	44.8	64.7	44.4	12.2	34.5	16.6	41.7	<0.001
Alcohol intoxication	5.9	3.8	8.1	0.3	12.0	0.0	18.1	<0.001
Discharge from any hospital within 7 days	3.0	3.9	1.6	0.4	1.0	0.8	6.4	0.131
>2 ED visits with past year	7.9	5.5	0.7	6.1	12.2	2.1	9.6	0.033
Traumatic abnormality on head CT	8.4	5.7	20.0	9.1	9.0	11.4	19.4	0.006