Prevalence and clinical characteristics of the different headache types (according to the questionnaire classification of Fritsche et al. (2007) [45]).
Headache type
(% of whole sample)
Chronic (% of all patients with this headache form)
Episodic (% of all patients with this headache form)
Days with headache/month
Patients with medication intake (% of all patients with this headache form)