Objective: The robust enrollment in SPARTAN and SAMURAI provided the opportunity to present post-hoc descriptive details on migraine disease characteristics and treatment outcomes after treatment with lasmiditan, a selective serotonin (5-HT) receptor agonist, in racial and ethnic subgroups.
Methods: Descriptive data from racial (White [W]( = 3471) and Black or African American [AA]( = 792)) and ethnic (Hispanic or Latinx [HL]( = 775) and Non-Hispanic or Latinx [Non-HL]( = 3637)) populations are presented on pooled data from two double-blind, placebo-controlled, randomized Phase 3 studies (SAMURAI [NCT02439320] and SPARTAN [NCT2605174]). Patients were treated with lasmiditan (50 (SPARTAN only), 100, or 200 mg) or placebo for a single migraine attack of moderate-to-severe intensity. Efficacy data were recorded in an electronic diary at baseline, 30, 60, 90, and 120 min. Safety was evaluated and reported by occurrences of adverse events.
Results: Clinical characteristics were generally similar across populations. W participants had longer migraine history than AA participants, and Non-HL participants had more migraine disability than HL participants. In the lasmiditan single-attack studies, AA participants waited longer than W participants to take study drug. A higher proportion of HL participants rated baseline migraine severity as severe compared to Non-HL participants. Response to lasmiditan was similar across racial and ethnic groups, including pain response, freedom from most bothersome symptom and migraine-related disability, and safety and tolerability. Across multiple outcomes, AA and HL participants tended to report more positive outcomes.
Conclusions: There were few differences in demographic and clinical characteristics across racial and ethnic groups. Similar lasmiditan efficacy and safety outcomes were observed in AA versus W participants, and in HL versus Non-HL participants. Small observed differences may be driven by a tendency toward a more positive response observed across all treatment groups by AA and HL participants.
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