Regional variation in diagnostic intensity of dementia among older U.S. adults: An observational study.

Alzheimers Dement

Institute for Healthcare Policy and Innovation, University of Michigan, 2800 Plymouth Rd, Ann Arbor, Michigan, USA.

Published: October 2024

AI Article Synopsis

  • * A study using Medicare claims analyzed the rate of ADRD diagnoses in older adults and found that the diagnosis rate varied significantly by hospital referral regions, with lower rates in certain demographic groups such as Black and Hispanic individuals, and those aged 66-74.
  • * The findings suggest that where individuals live significantly affects their chances of receiving an ADRD diagnosis, highlighting the need for targeted efforts in areas with low diagnosis intensity to improve case identification.

Article Abstract

Introduction: Geographic variation in diagnosed cases of Alzheimer's disease and related dementias (ADRD) could be due to underlying population risk or differences in intensity of new case identification. Areas with low ADRD diagnostic intensity could be targeted for additional surveillance efforts.

Methods: Medicare claims were used for a cohort of older adults across hospital referral regions (HRRs). ADRD-specific regional diagnosis intensity was measured as the ratio of expected new ADRD cases (estimated using population demographics, risk factors, and practice intensity) compared to observed ADRD-diagnosed cases.

Results: Crude new ADRD diagnosis rate ranged from 1.7 to 5.4 per 100 across HRRs. ADRD-specific diagnosis intensity ranged from 0.69 to 1.47 and varied most for Black, Hispanic, and the youngest (66-74) subgroups. Across all subgroups, ADRD diagnosis intensity was associated with 2-fold difference in receiving an ADRD diagnosis.

Discussion: Where one resides influences the likelihood of receiving an ADRD diagnosis, particularly among those 66-74 years of age and minoritized groups.

Highlights: Rate of new Alzheimer's disease and related dementias (ADRD) case identification varies geographically across the United States. Variation in case identification is greatest in Black, Hispanic, and young-old groups. Intensity of diagnosis (ie, case identification) unrelated to population risk differs across place. Likelihood of receiving an ADRD diagnosis varies 2-fold based on place of residence.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11485555PMC
http://dx.doi.org/10.1002/alz.14092DOI Listing

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