A recent study by Yale University experts reveals significant underreporting of dementia diagnoses among older Americans. According to the research, 67 percent of participants fail to acknowledge their dementia diagnosis, which is more than twice the rate of underreporting for other medical conditions.
Professor Xi Chen, the study’s lead author, shared that 23 percent of participants underreported hypertension, 17 percent arthritis, 39 percent diabetes, and 46 percent depression. The study, published in JAMA Network Open on August 26, highlights the stigma surrounding dementia, noting patient denial or concealment.
Dementia impacts more than one in ten older adults, potentially disrupting care planning, endangering patient safety, and limiting disease management. Yuting Qian, a postdoctoral associate at Yale, stressed the importance of clear communication and support following a diagnosis.
Study Insights
Chen indicated that patient unawareness or nondisclosure often involves health system factors, rather than patient behavior. Medicare Advantage enrollees, those visiting dementia specialists, and patients diagnosed in outpatient settings were less likely to underreport, emphasizing the role of health system practices.
Social vulnerabilities contribute to nondisclosure, including living alone, lower education levels, and dual Medicare-Medicaid eligibility. Chen noted that stigma remains influential, with dementia underreporting surpassing that of other stigmatized conditions like depression.
Some patients underreport due to lack of understanding or difficulty in accepting their diagnosis. Surprisingly, those who underreported dementia often failed to visit doctors for other health issues or receive flu vaccinations.
Implications
Underreporting can cause clinicians to miss critical intervention opportunities during the early stages of dementia. At this stage, patients can still make decisions regarding finances, safety, and treatment preferences. New disease-modifying therapies are most effective during this period.
Dr. Ambar Kulshreshtha from Emory University emphasized that unawareness or denial of a diagnosis can negatively affect health outcomes and care quality, increasing the risk of preventable complications.
Recommendations
Chen advocates for improved training and resources for clinicians to discuss dementia diagnoses transparently and compassionately. Outreach should focus on vulnerable patients, such as those living alone.
Addressing dementia stigma requires societal engagement. Open discussions and awareness can facilitate acceptance and access to available support.
Source: Chen, Xi et al. (2026). Dementia Diagnosis Underreporting and Care Engagement and Planning Among Older Adults. JAMA Network Open. Link
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