Table 1.

Diagnostic criteria of chronic post-traumatic headache (CPTH) attributed to mild head injury (5.2.2) according to ICHD-2

A.	Headache, no typical characteristics known, fulfilling criteria C and D
B.	Head trauma with all the following:
	1. either no loss of consciousness, or loss of consciousness of <30 minutes’ duration
	2. Glasgow Coma Scale (GCS) ≥13
	3. symptoms and/or signs diagnostic of concussion
C.	Headache develops within 7 days after head trauma
D.	Headache persists for >3 months after head trauma