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Randomised controlled trial: extended-duration dabigatran is non-inferior to warfarin and more effective than placebo for symptomatic VTE
  1. Timothy K Liem,
  2. Thomas G DeLoughery
  1. Divisions of Vascular Surgery, Hematology/Oncology, and Laboratory Medicine, Oregon Health & Science University, Portland, Oregon, USA
  1. Correspondence to : Dr Timothy K Liem, Division of Vascular Surgery OP-11, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, USA; liemt{at}

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In patients with idiopathic deep vein thrombosis (DVT) or pulmonary embolism (PE), extending the duration of warfarin beyond the initial 3–6 months of anticoagulation significantly reduces the risk for recurrence.1 ,2 Dabigatran is an oral direct-thrombin inhibitor that has been shown to be as effective as warfarin in the first 6 months after a venous thromboembolism (VTE).3 However, its efficacy and safety for extended therapy is not known.


Two parallel double-blinded randomised controlled studies were conducted, evaluating extended therapy with …

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  • Competing interests None.