ArticleKidney medicine2025
Oral Anticoagulant Initiation in Patients With Kidney Failure on Hemodialysis Newly Diagnosed With Atrial Fibrillation (2007-2020): An Observational Study of Trends and Disparities.
Article in Kidney medicine, 2025. 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
Rationale & Objective: Atrial fibrillation (AF) is common in patients with kidney failure on hemodialysis (HD), but few patients receive oral anticoagulant (OAC) treatment. Availability of direct-target OACs starting in 2010 may have induced greater OAC initiation, but this has not been systematically studied. Study Design: Retrospective cohort study. Setting & Participants: Using Medicare fee-for-service billing claims (2006-2020), we identified previously OAC-naïve HD patients newly-diagnosed with AF between January 1, 2007, and October 1, 2020. Exposures: Calendar year; race/ethnicity. Outcomes: OAC initiation within 90 days from AF diagnosis (any; specific agent). Analytical Approach: We estimated initiation risk ratios for each calendar year compared with the referent cohort, 2007, using unadjusted and multivariable-adjusted modified Poisson regression. We also determined differences by racial/ethnic group in OAC initiation, as well as any changes in these disparities over time. Results: Among 82,389 HD patients newly-diagnosed with AF, 20,002 (24.3%) initiated new OAC treatment within 90 days: 20.5% in 2007 and 34.1% in 2020. Direct-target OACs accounted for 81.0% of OAC initiations in 2020. Adjusted regression models estimated that OAC initiation remained essentially unchanged between 2007 and 2013, but thereafter increased toward a demographics-adjusted risk ratio of 1.61 (95% CI: 1.50-1.73) in 2020. Compared with non-Hispanic Whites, the rates of OAC initiation were 15% (95% CI, 12%-17%) lower among Black patients, 29% (95% CI, 24%-34%) lower among Asian patients, and 22% (95% CI, 19%-25%) lower among Hispanic patients. These disparities were not found to have differed across time ( Limitations: Lack of clinical detail to firmly establish contraindications to OAC initiation. Conclusions: While rates of OAC initiation among patients on HD with newly-diagnosed AF increased in recent years, predominantly driven by increased use of apixaban, OAC initiation rates remained low, at 34% of patients in 2020. Compared with non-Hispanic White patients, OAC initiation remained consistently lower in patients of other race and ethnic groups.
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