• J Med Econ · Sep 2013

    Comparative Study

    Medical costs in the US of clinical events associated with oral anticoagulant (OAC) use compared to warfarin among non-valvular atrial fibrillation patients ≥75 and <75 years of age, based on the ARISTOTLE, RE-LY, and ROCKET-AF trials.

    • Steve Deitelzweig, Alpesh Amin, Yonghua Jing, Dinara Makenbaeva, Daniel Wiederkehr, Jay Lin, and John Graham.
    • Ochsner Clinic Foundation, New Orleans, LA, USA. sdeitelzweig@ochsner.org
    • J Med Econ. 2013 Sep 1;16(9):1163-8.

    ObjectivesBased on clinical trials the oral anticoagulants (OACs) apixaban, dabigatran, and rivaroxaban are efficacious for reducing stroke risk for non-valvular atrial fibrillation (NVAF) patients. Based on the clinical trials, this study evaluated the medical costs for clinical events among NVAF patients ≥75 and <75 years of age treated with individual OACs vs warfarin.MethodsRates for primary and secondary efficacy and safety outcomes (i.e., clinical events) among NVAF patients receiving warfarin or each of the OACs were determined for NVAF populations aged ≥75 years and <75 years of age from the OAC vs warfarin trials. One-year incremental costs among patients with clinical events were obtained from published literature and inflation adjusted to 2010 costs. Medical costs, excluding medication costs, for clinical events associated with each OAC and warfarin were then estimated and compared.ResultsAmong NVAF patients aged ≥75, compared to warfarin, use of either apixaban or rivaroxaban was associated with a reduction in medical costs per patient year (apixaban = -$825, rivaroxaban =-$23), while dabigatran use was associated with increased medical costs of $180 per patient year. Among NVAF patients <75 years of age medical costs per patient year were estimated to be reduced -$254, -$367, and -$88, for apixaban, dabigatran, and rivaroxaban, respectively, in comparison to warfarin.LimitationsThis economic analysis was based on clinical trial data and, therefore, the direct application of the results to routine clinical practice will require further assessment.ConclusionsDifference in medical costs between OAC and warfarin treated NVAF patients vary by age group and individual OACs. Although reductions in medical costs for NVAF patients aged ≥75 and <75 were observed for those using either apixaban or rivaroxaban vs warfarin, the reductions were greater per patient year for both the older and younger NVAF populations using apixaban.

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