Langbaum, Jessica B.Maloney, ErinHennessy, MichaelHarkins, KristinKarlawish, JasonNosheny, Rachel L.Bleakley, Amy2023-08-142023-08-142023-05-19Langbaum, JB, Maloney, E, Hennessy, M, et al. How intention to join an Alzheimer's participant recruitment registry differs by race, ethnicity, sex, and family history: Results from a national survey of US adults. Alzheimer's Dement. 2023; 1-8. https://doi.org/10.1002/alz.131261552-5279https://udspace.udel.edu/handle/19716/33067This article was originally published in Alzheimer's & Dementia: The Journal of the Alzheimer's Association. The version of record is available at: https://doi.org/10.1002/alz.13126. © 2023 The Authors. Alzheimer's & Dementia published by Wiley Periodicals LLC on behalf of Alzheimer's Association.INTRODUCTION Alzheimer's-focused participant recruitment registries are tools for accelerating enrollment into studies, however, registry members are primarily White women. METHODS We conducted a national online survey of 1501 adults ages 50–80, oversampling for Black and Hispanic/Latino respondents, assessing intention to join a generic “brain health” registry and to join a registry that required specific tasks. RESULTS Intention to join a registry was low (M 3.48, SD 1.77), and lower than intention to join a registry requiring specific tasks. Intention was greatest for registries requiring completing surveys (M 4.70, SD 1.77). Differences in intention were primarily between White women and Black women; differences between other groups were limited to specific tasks required. DISCUSSION The results indicate uncertainty about what a registry is, its purpose, and/or the concept of “brain health.” Using the Reasoned Action Approach (RAA) to develop evidence-based outreach messages describing a registry and required tasks may increase diversity.en-USAlzheimer'sdiversityparticipantpreventionReason Action ApproachrecruitmentregistryArticle