Objective This interview study explored clinicians’ perspectives and parents’ decision making about children’s participation in Duchenne muscular dystrophy (DMD) clinical trials. Methods Data from semi-structured interviews conducted with clinicians and parents in U.S. or Canada were assessed using thematic analysis. Results Eleven clinicians involved in ten trials and fifteen parents involved in six trials were interviewed. Parents described benefit-risk assessments using information from advocacy, peers, professionals, and sponsors. Strong influence was attributed to the progressive nature of DMD. Most expected direct benefit. Few considered the possibility of trial failure. Most made decisions to participate before the informed consent (IC) process, but none-the-less perceived informed choice with little to lose for potential gain. Clinicians described more influence on parental decisions than attributed by parents. Clinicians felt responsible to facilitate IC while maintaining hope. Both clinicians and parents reported criticisms about the IC process and regulatory barriers. Conclusions The majority of parents described undertaking benefit-risk assessments that led to informed choices that offered psychological and potential disease benefits. Parents’ high expectations influenced their decisions while also reflecting optimism. Clinicians felt challenged in balancing parents’ expectations and likely outcomes. Prognosis-related pressures coupled with decision making prior to IC suggest an obligation to ensure educational materials are understandable and accurate, and to consider an expanded notion of IC timeframes. Anticipatory guidance about potential trial failure might facilitate parents’ deliberations while aiding clinicians in moderating overly-optimistic motivations. Regulators and industry should appreciate special challenges in progressive disorders, where doing nothing was equated with doing harm.

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