ArticleJournal of diabetes and metabolic disorders2026
Treatment of type 2 diabetes among medicare beneficiaries with and without alzheimer's disease: A retrospective cohort study.
Article in Journal of diabetes and metabolic disorders, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: While Alzheimer's disease (AD) and type 2 diabetes mellitus (T2DM) commonly co-occur in older adults, little is known regarding whether and how the treatment of T2DM varies by AD status. This study aimed to compare and contrast T2DM treatment among individuals with and without AD. Methods: We conducted a retrospective cohort study using 20% Medicare Fee-for-Service claims data from 2016 to 2020. The primary outcome was initiation of any antidiabetic medication within one year of T2DM diagnosis, and we also examined initiation patterns across specific drug classes. We used multivariable logistic regression to estimate adjusted odds ratios for the association between AD and treatment initiation. Results: Among 388,359 beneficiaries newly diagnosed with T2DM, 9,584 had AD. Within one year, overall treatment initiation was lower for individuals with AD compared to those without. At initiation, individuals with AD were more likely to receive insulin and less likely to receive metformin, sodium-glucose cotransporter 2 (SGLT2) inhibitors, or glucagon-like peptide-1 (GLP-1) receptor agonists. In adjusted models, AD was associated with lower odds of antidiabetic treatment initiation, and among those initiating treatment, lower odds of initiating newer agents such as GLP-1 receptor agonists and SGLT2 inhibitors. Conclusion: Beneficiaries with AD were less likely to initiate antidiabetic therapy, particularly newer agents. Future work could explore the basis for these differences.
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