Fig. 1From: Prevalence, management and burden of episodic and chronic headaches—a cross-sectional multicentre study in eight Austrian headache centresPercentages of patients with contraindications against, ever-before use of, and frequency reduction by ≥ 50 % by five standard prophylactic drugs for migraine and/or TTH in EH compared to CH, White bars = episodic headache, black bars = chronic headache, *p < 0.05; **p < 0.001Back to article page