Cited by 431Atrial Fibrillation Management and OutcomesDialysis and Renal Disease ManagementAcute Ischemic Stroke Management

Warfarin use associates with increased risk for stroke in hemodialysis patients with atrial fibrillation

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Chan, Kevin E., Lazarus, J. Michael, Thadhani, Ravi, Hakim, Raymond M.·2009·Journal of the American Society of Nephrology

Abstract

Use of warfarin, clopidogrel, or aspirin associates with mortality among patients with ESRD, but the risk-benefit ratio may depend on underlying comorbidities. Here, we investigated the association between these medications and new stroke, mortality, and hospitalization in a retrospective cohort analysis of 1671 incident hemodialysis patients with preexisting atrial fibrillation. We followed patient outcomes from the time of initiation of dialysis for an average of 1.6 yr. Compared with nonuse, warfarin use associated with a significantly increased risk for new stroke (hazard ratio 1.93; 95% confidence interval 1.29 to 2.90); clopidogrel or aspirin use did not associate with increased risk for new stroke. Analysis using international normalized ratio (INR) suggested a dose-response relationship between the degree of anticoagulation and new stroke in patients on warfarin (P = 0.02 for trend). Warfarin users who received no INR monitoring in the first 90 d of dialysis had the highest risk for stroke compared with nonusers (hazard ratio 2.79; 95% confidence interval 1.65 to 4.70). Warfarin use did not associate with statistically significant increases in all-cause mortality or hospitalization. In conclusion, warfarin use among patients with both ESRD and atrial fibrillation associates with an increased risk for stroke. The risk is greatest in warfarin users who do not receive in-facility INR monitoring.

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  • Warfarin use was associated either with a neutral or increased risk of stroke in database analyses of patients on dialysis, including a population-based analysis in Canada (adjusted HR for stroke 1.14; 95% CI 0.78-1.67, adjusted HR for bleeding 1.44; 95% CI 1.13-1.85).

    “Warfarin use was associated either with a neutral or increased risk of stroke in database analyses of patients on dialysis, [419][420][421] including a population-based analysis in Canada (adjusted HR for stroke 1.14; 95% CI 0.78-1.67,adjusted HR for bleeding 1.44; 95% CI 1.13-1.85).422”

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Research works printed but not linked: 4

  1. [1]US Renal Data System: Cardiovascular Special Studies, Bethesda, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, 2005 [Google Scholar]
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Authors
Chan, K. E., Lazarus, J. M., Thadhani, R., & Hakim, R. M.
Affiliations
  • Fresenius Medical Care (United States) (US)
  • Massachusetts General Hospital (US)
Corresponding author
  • Chan, Kevin E.
  • Lazarus, J. Michael
  • Hakim, Raymond M.
Venue
Journal of the American Society of Nephrology
Published
2009-10
Volume
20
Issue
10
Pages
2223-2233
ISSN
1046-6673 (ISSN-L)
OpenAlex
W2137138584
Cited by
431
References
86
Citations by year
2026: 6 · 2025: 11 · 2024: 12 · 2023: 17 · 2022: 15 · 2021: 20 · 2020: 23 · 2019: 21 · 2018: 38 · 2017: 40 · 2016: 40 · 2015: 43 · 2014: 34 · 2013: 35 · 2012: 29
FWCI
16.39
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Society of Nephrology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
  • Health Sciences › Medicine › Nephrology › Dialysis and Renal Disease Management
  • Health Sciences › Medicine › Epidemiology › Acute Ischemic Stroke Management
Keywords
warfarin, stroke risk, hemodialysis, atrial fibrillation, end-stage renal disease, clopidogrel, aspirin, INR monitoring, anticoagulation, mortality, hospitalization
MeSH terms
Aged, Anticoagulants, Atrial Fibrillation, Female, Renal Dialysis, Hospitalization, Humans, Kidney Failure, Chronic, Male, Regression Analysis, Retrospective Studies, Risk, Warfarin, Cohort Studies, International Normalized Ratio, Stroke

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