Fig. 3
From: Prevalence of primary headaches in Germany: results of the German Headache Consortium Study
Prevalence of episodic and chronic primary headache disorders. In total, 9,944 participants responded of whom in 31 cases (0.3%) information on headache type was missing. In 278 (2.8%) cases, data about headache frequency were missing. The questionnaire was duly completed by 9,635 respondents. Episodic headache was reported by 55.5%, chronic headache by 2.6% and no headache by 41.8% of the participants