The following outcomes were assessed in patients with and without MO based on mean change from baseline (28-day pretreatment period) in the: monthly average number of headache days of at least moderate severity during the 12-week treatment period; monthly average number of migraine days during the 12-week treatment period; and monthly average number of days of any acute headache medication use. Also assessed was the proportion of patients with a ≥ 50% reduction from baseline (28-day pretreatment period) in the monthly average number of headache days of at least moderate severity during the 12-week treatment period; mean change from baseline (day 0) in scores on the six-item Headache Impact Test (HIT-6; scores range from 36 to 78, with higher scores indicating greater impact of headache on functional status and well-being) [18] at 4 weeks after the last dose of study drug; mean change from baseline (day 0) in domain scores on the Migraine-Specific Quality of Life (MSQoL) questionnaire (domains assessed: role function–restrictive [RFR; seven items on how migraines limit daily activities], role function–preventive [RFP; four items on how migraines prevent these activities], emotional function [EF; three items on the emotional effects of migraines]; scores range from 0 to 100, with higher scores indicating better health-related quality of life) [19] at 4 weeks after the last dose of study drug; and mean change from baseline (day 0) in scores on the nine-item Patient Health Questionnaire (PHQ-9; scores range from 0 to 27, with depression severity categorized as no or minimal [0 to 4], mild [5 to 9], moderate [10 to 14], moderately severe [15 to 19], and severe [20 to 27]) [20] at 4 weeks after the last dose of study drug.