Fig. 1From: Clinical outcome of a headache-specific multidisciplinary treatment program and adherence to treatment recommendations in a tertiary headache center: an observational studyChange in number of headache days per month at baseline and follow-up. Headache days per month (mean ± standard error of mean) at baseline and at follow-up after 12–18 months. *p < 0.05; **p < 0.01; ***p < 0.001 (comparison by t tests). TTH tension-type headacheBack to article page