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Article Abstract
Purpose Of Review: Patient-reported outcome (PRO) measures validated in primary sclerosing cholangitis (PSC) are needed for clinical trials. This review describes the recent US Food & Drug Administration (FDA) Patient-Focused Drug Development (PFDD) guidelines, existing PRO measures used in PSC studies, and the design of PSC-specific symptom measures adherent with the guidelines.
Recent Findings: FDA released updated guidance reflecting best practices for the design and evaluation of clinical outcome assessments (including PROs) and the design of trial endpoints. Two recent systematic reviews (2018, 2020) identified multiple PRO measures used in PSC studies, with two additional measures published since. Of these, four were developed in samples inclusive of PSC patients and six have been psychometrically evaluated in PSC. Published evidence to sufficiently support alignment with the recent guidance is sparse. We review the design of three symptom measures for PSC to illustrate alignment with FDA guidance, including qualitative and quantitative studies to provide evidence for their validity for use in adult PSC trials.
Summary: Investigators planning to use PRO measures as study endpoints for PSC need to be adherent with the recent FDA guidelines and build the evidence base to support the measure as fit-for-purpose as an endpoint for clinical trials.
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