CM Chronic migraine, EF Emotional function, HIT-6 Six-item Headache Impact Test, LSM Least-squares mean, LSMD Least-squares mean difference, MO Medication overuse, MSQoL Migraine-Specific Quality of Life, RFP Role function–preventive, RFR Role function–restrictive, PHQ-9 Patient Health Questionnaire-9, SE Standard error
LSMD was determined in comparison to placebo