Abstract
Several patient-reported outcome measures are available to monitor headache impact, but are those reliable in real-life clinical practice? Two identical patient-reported outcome measures (HALT-90 and MIDAS) were applied simultaneously in each clinical visit to a series of patients treated with monoclonal antibodies for migraine and intra-individual agreement was evaluated using the intraclass correlation coefficients. Our sample included 92 patients, 92.4% females, 45 years old on average. Moderate (0.50 to 0.75) and even poor (<0.50) ICC were observed in all but the first item of these patient-reported outcome measures in at least one evaluation. Over time, missing data were more frequent and no learning effect was detected. We observed intra-personal variation in reliability when answering patient-reported outcome measures, persisting in repeated applications, and a decrease in the motivation to respond, which should alert clinicians for these additional challenges in real-life clinical practice.
Published Version
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