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Vol. 35, No. 4, 2013
Issue release date: May 2013
Section title: Original Paper
Cerebrovasc Dis 2013;35:320-326
(DOI:10.1159/000347074)

Modeling of the Impact on Health Outcomes of the Use of Dabigatran in Patients with Atrial Fibrillation

Chevalier J. · Giroud M. · de Pouvourville G.
aChair of Health Systems, ESSEC Business School, Cergy-Pontoise, and bDijon Stroke Registry, EA4184, Department of Neurology, University Hospital and Medical School of Dijon, University of Burgundy, Dijon, Paris

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 7/31/2012 2:07:49 PM
Accepted: 1/2/2013
Published online: 4/23/2013

Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 4

ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED

Abstract

Background: Atrial fibrillation (AF) is the main direct cause of stroke. Prevention by anticoagulation or antithrombotic treatment is required, vitamin K antagonists (VKAs) and aspirin being the main agents. Dabigatran etexilate is a novel oral direct thrombin inhibitor. The RE-LY study demonstrated that in patients with AF, the rates of stroke and systemic embolism were similar (at a dose of 110 mg) or lower (at a dose of 150 mg) than those observed in patients treated with warfarin, a VKA. The aim of the present study was to estimate, through modeling, the number of severe events avoided with dabigatran at dosages of 110 mg (D110) or 150 mg (D150) twice daily compared to warfarin, when prescribed in the French population for patients with AF who meet the inclusion criteria of the Randomized Evaluation of Long-Term Anticoagulant Therapy (RE-LY) study. Methods: We used a decision tree type model to simulate the outcome at 5 years in a cohort of patients eligible for treatment with dabigatran. We compared 3 hypothetical cohorts: all AF patients are treated with D110, D150 and warfarin. Based on the probabilities of occurrence of the different outcomes observed in the RE-LY study and in the Dijon Stroke Registry, we simulated for each year during 5 years the evolution of the 3 cohorts. The model allows to simulate a prevalent cohort of 461,392 patients at year zero, with a follow-up of 5 years (‘constant prevalence model'), and it can also take into account incident patients during 5 years (‘dynamic prevalence model'). The different events taken into account were: major hemorrhages (excluding hemorrhagic strokes), myocardial infarctions, hemorrhagic strokes, ischemic strokes, recurrence of strokes (without differentiating the mechanism) or deaths. Results: Considering the constant prevalence model, the use of D110 instead of warfarin for the whole target population in France would permit to avoid 10,012 events and to save 18,879 years of life in a period of 5 years. These figures are 13,484 and 27,736 for D150 instead of warfarin. Considering the dynamic prevalence model, the use of D110 for the whole target population in France would permit to avoid 13,620 events and to save 22,674 years of life in a period of 5 years. These figures are 18,186 and 33,091 for D150. Conclusion: The use of dabigatran would lead to a significant reduction of strokes and deaths attributable to AF in France.


  

Author Contacts

Julie Chevalier
Chair of Health Economics and Management
ESSEC Business School, Avenue Bernard Hirsch
PO Box 50105, FR-95021 Cergy-Pontoise Cedex (France)
E-Mail chevalier@essec.edu

  

Article Information

Received: July 31, 2012
Accepted: January 2, 2013
Published online: April 23, 2013
Number of Print Pages : 7
Number of Figures : 0, Number of Tables : 4, Number of References : 22

  

Publication Details

Cerebrovascular Diseases

Vol. 35, No. 4, Year 2013 (Cover Date: May 2013)

Journal Editor: Hennerici M.G. (Mannheim)
ISSN: 1015-9770 (Print), eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 7/31/2012 2:07:49 PM
Accepted: 1/2/2013
Published online: 4/23/2013

Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 4

ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)

For additional information: http://www.karger.com/CED


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