Table 1.

Distribution of studies according to variables: type of accident and time between mild TBI and onset of headache in cPTH group.

Variables		n	%
Type of accident	Motorcycle accident	1	5.3
	Aggression	2	10.5
	Simple falls	8	42.1
	Bicycle fall	1	5.3
	Running over	2	10.5
	Head struck with sharp object	3	15.8
	Automobile accident	2	10.5
	Total	19	100.0
Time between TBI and onset of headache	Up to 3 days	13	68.4
	4 to 7 days	6	31.6
	Total	19	100.0