Table 1.

Determinants of unplanned 72-hour ED return for patients with mild traumatic brain injury.

	Unplanned return ED visit – yes (124 patients)	Unplanned return ED visit – no (2,443 patients)	p-value
Age	Mean= 45.9 SD= 22.5	Mean= 43.0 SD= 21.5	0.15
Gender – % male	66.9%	57.0%	0.02
Black race	22%	16%	0.04
Vomiting at time of head trauma	6.4%	6.0%	0.84
Seizure at time of head trauma	3.2%	1.7%	0.22
Loss of consciousness	43.5%	48.0%	0.93
Alteration of consciousness	24.2%	28.2%	0.48
Post traumatic amnesia	28.2%	27.9%	0.99
Fracture on head CT	18.2%	18.1%	0.99
Bleed on head CT	74.5%	60.0%	0.03

ED, emergency department; CT, computed tomography