Participants recorded daily duration of migraine in a diary. A migraine day was any calendar day on which the participant experienced a migraine headache qualified by duration or acute symptomatic medication use. The monthly (4-week) migraine days was defined as the total number of reported migraine days in diary divided by total number of days with diary records during each 4-week period and multiplied by 28. Each 4-week period was averaged. Baseline was defined as the number of migraine days during the last 28 days of the Baseline phase, from Day -28 to -1. Negative change from Baseline indicates improvement. A Mixed-effects model for repeated measures (MMRM) was used for analysis.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period of eDiary data, and had at least 1 evaluable post-baseline 4-week period of eDiary data during the Double-blind Treatment Period.

Participants recorded daily total duration of a headache in a diary. A headache day is any calendar day on which the participant experienced a headache qualified by duration or acute symptomatic medication use. The monthly (4-week) headache days were defined as the total number of reported headache days in the diary divided by the total number of days with diary records during each 4-week period and multiplied by 28. Each 4-week period was averaged. Baseline was defined as the number of migraine days during the last 28 days of the Baseline phase, from Day -28 to -1. Negative change from Baseline indicates improvement. MMRM was used for analysis.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period of eDiary data, and had at least 1 evaluable post-baseline 4-week period of eDiary data during the Double-blind Treatment Period.

Participants recorded allowed medication(s) to treat an acute migraine in the daily diary. The monthly (4-week) acute medication use days was defined as the total number of reported acute medication use days in the diary divided by the total number of days with diary records during each 4-week period and multiplied by 28. Each 4-week period was averaged. Baseline was defined as the number of acute medication use days during the last 28 days of the Baseline phase, from Day -28 to -1. A negative change from Baseline indicates improvement. MMRM was used for the analysis.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period of eDiary data, and had at least 1 evaluable post-baseline 4-week period of eDiary data during the Double-blind Treatment Period.

Participants recorded daily duration of migraine in a diary. A migraine day was any calendar day on which the participant experienced a migraine headache qualified by duration or acute symptomatic medication use. The monthly (4-week) migraine days is equal to total number of reported migraine days in diary divided by total number of days with diary records in each 4-week period multiplied by 28. Each 4-week period was averaged.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period (Day -28 to Day -1) of eDiary data, and had at least 1 evaluable post-baseline 4-week period (Weeks 1-4, 5-8, and 9-12) of eDiary data during the Double-blind Treatment Period.

MSQ v2.1 is a 14-item questionnaire designed to measure health-related quality-of-life impairments attributed to migraine in the past 4 weeks. It is divided into three domains: role function-restrictive (questions 1-7, score range 7 to 42) assesses how migraines limit one's daily social and work-related activities; role function-preventive (questions 8-11, score ranges 4 to 24) assesses how migraines prevent these activities; and the emotional function (questions 12-14, score ranges 3 to 18) domain assesses the emotions associated with migraines. Participants respond to items using a 6-point scale where 1=none of the time and 6=all of the time. Raw dimension scores are computed as a sum of item responses and rescaled to a 0 to 100 scale, where higher scores from Baseline indicate better quality of life. MMRM was used for the analysis.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period of eDiary data, and had at least 1 evaluable post-baseline 4-week period of eDiary data during the Double-blind Treatment Period. Overall number analyzed is the number of participants with data available for analysis.

The AIM-D is a 9-item PRO measure that assesses the impact of migraine on the performance of daily activities and physical impairment using a 6-point rating scale where 0=not difficult at all, 1=a little difficult, 2=somewhat difficult, 3=very difficult, 4=extremely difficult, and 5=I could not do it at all. The raw performance of daily activities domain scores were transformed to 0-100 scale, with higher scores indicating greater impact of migraine (higher disease burden). Baseline was defined as the monthly (averaged for a month) performance of daily activities domain score during the last 28 days of the Baseline period from Day -28 to -1. MMRM was used for the analysis.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period of eDiary data, and had at least 1 evaluable post-baseline 4-week period of eDiary data during the Double-blind Treatment Period. Overall number analyzed is the number of participants with data available for analysis.

The AIM-D is a 9-item PRO measure that assesses the impact of migraine on the performance of daily activities and physical impairment using a 6-point rating scale where 0=not difficult at all, 1=a little difficult, 2=somewhat difficult, 3=very difficult, 4=extremely difficult, and 5=I could not do it at all. The raw physical impairment domain scores were transformed to 0-100 scale, with higher scores indicating greater impact of migraine (higher disease burden). Baseline was defined as the monthly (averaged for a month) physical impairment domain score during the last 28 days of the Baseline period from Day -28 to -1. MMRM was used for the analysis.

mITT Population included all randomized participants who received at least 1 dose of study intervention, had an evaluable Baseline period of eDiary data, and had at least 1 evaluable post-baseline 4-week period of eDiary data during the Double-blind Treatment Period. Overall number analyzed is the number of participants with data available for analysis.