Summary
Currently, low molecular weight heparin (LMWH) is the guideline endorsed treatment
of patients with cancer associated venous thromboembolism (VTE). While apixaban is
approved for the treatment of acute VTE, there are limited data supporting its use
in cancer patients. The rationale and design of this investigator initiated Phase
IV, multicenter, randomized, open label, superiority trial assessing the safety of
apixaban versus dalteparin for cancer associated VTE is provided (ADAM-VTE; NCT02585713).
The main aim of the ADAM-VTE trial is to test the hypothesis that apixaban is associated
with a significantly lower rate of major bleeding compared to dalteparin in the treatment
of cancer patients with acute VTE. The primary safety outcome is rate of major bleeding.
Secondary efficacy objective is to assess the rates of recurrent VTE or arterial thromboembolism.
Cancer patients with acute VTE (n=300) are randomized to receive apixaban (10 mg twice
daily for 7 days followed by 5 mg twice daily thereafter) or dalteparin (200 IU/Kg
daily for 30 days followed by 150 IU/kg daily thereafter) for 6 months. Stratification
factors used for randomization include cancer stage and cancer specific risk of venous
thromboembolism using the Khorana score. Participating centers are chosen from the
Academic and Community Cancer Research United (ACCRU) consortium comprised of 90 oncology
practices in the United States and Canada. Based on the hypothesis to be tested, we
anticipate that these trial results will provide evidence supporting apixaban as an
effective treatment of cancer associated VTE at lower rates of major bleeding compared
to LMWH.
Key words
Cancer - venous thromboembolism - apixaban - dalteparin