Differences in Characteristics of Headache Patients With a Positive or Negative FRT: a Cross-sectional Comparison.

Inclusion Criteria: * Diagnosis of cervicogenic headache according to the ICHD-3 criteria: A. Any headache fulfilling criterion C B. Clinical and/or imaging evidence1 of a disorder or lesion within the cervical spine or soft tissues of the neck, known to be able to cause headache2 C. Evidence of causation demonstrated by at least two of the following: * headache has developed in temporal relation to the onset of the cervical disorder or appearance of the lesion * headache has significantly improved or resolved in parallel with improvement in or resolution of the cervical disorder or lesion * cervical range of motion is reduced, and headache is made significantly worse by provocative manœuvres * headache is abolished following diagnostic blockade of a cervical structure or its nerve supply D. Not better accounted for by another ICHD-3 diagnosis Age: 18+ years Headache for at least 1 day/week for at least 3 months Limited mobility of the neck NPRS \> 3/10 Exclusion Criteria: * Primary headache forms: migraine, TTH * Other secondary headaches that do not comply with the ICDH-3 criteria for CH * Whiplash or other traumatic incident in the past * Pregnancy or given birth in the last year * Previous head, neck or shoulder surgery * Cervical radiculopathy complaints * Receiving other treatments for headache or neck pain (physical therapy/ostheopathy/chiropraxie...) in the previous month