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Fig. 1 | The Journal of Headache and Pain

Fig. 1

From: Long-term study of the efficacy and safety of OnabotulinumtoxinA for the prevention of chronic migraine: COMPEL study

Fig. 1

Overview of COMPEL Study design. HIT-6 = 6-item Headache Impact Test; IVRS = interaction voice response system; PHQ-9 = 9-item Patient Health Questionnaire. Adapted from Blumenfeld AM, Aurora SK, Laranjo K, Papapetropoulos S. Unmet Clinical Needs in Chronic Migraine: Rationale for Study and Design of COMPEL, an Open-Label, Multicenter Study of the Long-Term Efficacy, Safety, and Tolerability of OnabotulinumtoxinA for Headache Prophylaxis in Adults With Chronic Migraine. BMC Neurol. 2015; 15: 1–9

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