Eligibility for anti-amyloid treatment in a multiethnic community-based study.

Introduction: The approval of anti-amyloid monoclonal antibodies (mAbs), including lecanemab and donanemab, represents a significant advance in disease-modifying therapies (DMTs) for early Alzheimer's disease (AD). While appropriate use recommendations (AURs) have been established to guide clinical decision-making, the proportion of individuals with cognitive impairment in real-world, multiethnic populations meeting eligibility criteria remains unknown, as do potential differences in treatment-related risks across ethnic groups. Methods: We included 513 cognitively impaired individuals from the Health and Aging Brain Study-Health Disparities study, a multiethnic community-based cohort. Eligibility for lecanemab and donanemab was determined using published AUR criteria. Counts of amyloid-related imaging abnormalities were estimated based on apolipoprotein E ( Results: Only 15% of participants met eligibility criteria for lecanemab or donanemab. Black individuals had a numerically higher estimated ARIA burden, though differences were not statistically significant. Discussion: Few individuals in this community-based, multiethnic cohort met eligibility for anti-amyloid therapy, highlighting limited real-world applicability of current AURs. Highlights: Only 15% of community-based individuals with MCI or dementia met eligibility criteria for lecanemab and donanemab.Black participants had numerically higher estimated ARIA cases, though not statistically significant.Current AUR criteria have limited real-world applicability across multiethnic populations.Broader inclusion criteria and real-world safety data are needed to ensure equitable, safe implementation.