With the advent of new medications aimed at Alzheimer’s disease and other forms of dementia, a recent study highlights a crucial but perhaps overlooked factor in accessing these treatments: the patient’s geographic location. The research, published in Alzheimer’s & Dementia: The Journal of the Alzheimer’s Association by a team from the University of Michigan, underscores the significant variation in the rates of new dementia diagnoses across different U.S. regions.
The study’s findings reveal that the likelihood of receiving a dementia diagnosis can vary greatly depending on where one lives, especially for individuals aged between 66 and 74 and those from Black or Hispanic backgrounds. In some areas, a person might be twice as likely to receive a dementia diagnosis compared to others, suggesting that systemic differences in healthcare practices could be more influential than the personal health factors traditionally associated with dementia risk.
A formal diagnosis of dementia is not merely a label; it is a gateway to potentially life-altering treatments. New tests and therapies, particularly those targeting the early stages of dementia, such as mild cognitive impairment or mild Alzheimer’s disease, are contingent upon an official diagnosis. These treatments are designed to slow the progression of the disease, offering patients a better quality of life for a more extended period.
The research team, led by Julie Bynum, M.D., M.P.H., of the University of Michigan, analyzed Medicare data covering 4.8 million people over the age of 66 in 2019. They found that the rate of new diagnoses in that year alone varied widely—ranging from 1.7% to 5.4% across different hospital referral regions (HRRs). These regions are often used in healthcare studies, and each includes at least one hospital capable of performing advanced surgeries. This indicates their capability to provide specialized services for diagnosing and treating dementia.
What is particularly compelling about this study is its focus on ‘diagnostic intensity’ — a metric that considers not just the raw numbers of diagnoses but also adjusts for known dementia risk factors and regional healthcare variations. By examining these adjusted figures, the study aims to offer a more nuanced understanding of how factors beyond individual risk can influence diagnosis rates. The implications of such findings are profound, suggesting that improving diagnosis rates could hinge on addressing regional disparities in healthcare access and quality.
Dr. Bynum’s comments reflect an awareness of the broader socio-economic and cultural dynamics. She points out that variations in diagnosis rates could be a product of differences in how healthcare is practised in various regions, including how frequently individuals are screened for early signs of dementia by their primary care providers. Cultural and personal attitudes towards seeking medical help can also significantly influence whether individuals are likely to consult a doctor about their memory concerns without prompting.
The study also highlights the underdiagnosis or overdiagnosis in certain regions, which could guide future efforts to understand and remove barriers to diagnosis. This is crucial because timely diagnosis helps manage the disease more effectively and plane the needs of patients and their families. For healthcare systems and communities, the study serves as a call to action to spread awareness and improve services related to dementia care. For individuals, it underscores the importance of advocating for oneself to ensure access to necessary medical evaluations and care.
While the study paints a complex picture of how dementia is diagnosed across the U.S., it also offers clear paths forward. By understanding and addressing the disparities in diagnostic practices, there is potential to improve health outcomes for individuals with dementia and make strides in public health at a regional level. The ultimate goal is to ensure everyone at risk has equal access to diagnoses and treatments that could significantly improve their lives.
More information: Julie P. W. Bynum et al, Regional variation in diagnostic intensity of dementia among older U.S. adults: An observational study, Alzheimer’s & Dementia. DOI: 10.1002/alz.14092
Journal information: Alzheimer’s & Dementia Provided by Michigan Medicine – University of Michigan
