Efficacy and safety of eptinezumab for migraine prevention in patients with prior preventive treatment failures: subgroup analysis of the randomized, placebo-controlled DELIVER study

Chronic migraine; Episodic migraine; Eptinezumab Migraña crónica; Migraña episódica; Eptinezumab Migranya crònica; Migranya episòdica; Eptinezumab Background Migraine is a disabling neurological disease adversely affecting many aspects of life. Most patients are still required to have failed several older oral preventive therapies before being reimbursed for a preventive, migraine-specific anti-calcitonin gene-related peptide treatment. In the 24-week placebo-controlled portion of DELIVER, eptinezumab was shown to reduce migraine frequency and resulted in higher migraine responder rates compared with placebo in patients with two to four previous preventive treatment failures. This subgroup analysis assessed if demographic or clinical characteristics were associated with differences in preventive benefits. Methods Migraine frequency reductions and responder rates (i.e., the proportion of patients reaching a ≥50% and ≥75% reduction in monthly migraine days relative to baseline) were determined in the total population and predefined subgroups by sex, age, migraine frequency (chronic migraine, episodic migraine, high-frequency episodic migraine, low-frequency episodic migraine), medication overuse, medication-overuse headache, and previous preventive treatment failures (2, >2). The primary endpoint was change from baseline in monthly migraine days over weeks 1–12. Results Eptinezumab 100 and 300 mg reduced monthly migraine days more than placebo over weeks 1–12 (−4.8 and −5.3 vs –2.1, respectively; p