Evaluating the relationship between the 4-item migraine interictal burden scale and other patient-reported outcome measures: a post hoc analysis from a phase 3 migraine prevention study
Abstract
BACKGROUND: People with migraine report reduced health-related quality of life during ictal and interictal phases. However, most patient-reported outcome measures (PROMs) focus on impact during migraine episodes (ictal) or globally (both ictal and interictal), potentially neglecting interictal burden. This exploratory analysis evaluated correlations between the 4-item Migraine Interictal Burden Scale (MIBS-4) total score and other PROMs in people with migraine.
METHODS: A post hoc analysis was conducted using participant data from a galcanezumab phase 3, placebo-controlled, 3-month study, followed by a 3-month open-label extension in participants with prior treatment failures. Correlations were assessed between baseline MIBS-4 and disease characteristics, baseline MIBS-4 and demographics, and MIBS-4 and other PROMs/monthly migraine headache days at baseline and at Month (M) 6, using Spearman's rank correlation coefficient (rs).
RESULTS: A total of 462 participants were included (mean age: 45.8 years); 85.9% were female, 58.2% had episodic migraine and 41.8% had chronic migraine. At baseline, highest correlations with MIBS-4 were observed for Migraine Specific Quality of Life Questionnaire (MSQ)-total score, MSQ-Emotional Function (MSQ-EF), and the Patient Health Questionnaire (PHQ-9) score, which measures depressive symptoms (all p < 0.001). Correlation analysis between MIBS-4 and MSQ-total score revealed moderate correlation at baseline (r s:-0.53) that transitioned to…
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