Fig. 2From: Impact of headache frequency and preventive medication failure on quality of life, functioning, and costs among individuals with migraine across several European countries: need for effective preventive treatmentHealth-related quality of life: functional disability (MIDAS total score and disability categories). Results were adjusted for age, sex, country, insurance type, body mass index category, smoking history, alcohol intake, exercise, CCI, PHQ-9, and GAD-7. *P < 0.05 vs ≥ 2 preventive treatment failures group. aNo/Little or mild disability vs moderate/severe disability. Criterion for disability was MIDAS score ≥ 11. CCI, Charlson Comorbidity Index; GAD-7, Generalized Anxiety Disorder-7; MIDAS, Migraine Disability Assessment; PHQ-9, Patient Health Questionnaire-9Back to article page