Table 3.

Proportion of patients with each predictor variable.

Potential predictor variable	Participants with symptoms ≤28 days n/N (%)	Participants with symptoms >28 days n/N (%)	p-Value
Male	21/40	13/24	1.00
Prior sport-related concussion	18/39	9/23	0.61
Prior concussion (non-sport-related)	5/36	5/23	0.49
Prior undiagnosed concussion	8/33	7/21	0.54
Prior treatment for headaches	5/39	5/23	0.48
Family history of concussions	7/38	7/21	0.22
Prior diagnosis of migraines headaches	2/39	2/22	0.62
LOCa at time of injury	7/35	6/22	0.54
Amnesia at time of injury	6/37	9/23	0.07

^aLOC, loss of consciousness.