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Efficacy and safety of anticoagulant agents in patients with venous thromboembolism and cancer: A network meta-analysis

Published:September 01, 2018DOI:https://doi.org/10.1016/j.thromres.2018.08.023

      Highlights

      • The clinical benefit of DOACs in patients with cancer and venous thromboembolism (CAT) is debated.
      • We compared the use of DOACs, VKAs or LMWHs in 4720 patients with CAT.
      • Risk of recurrent VTE was 50% lower in patients who received DOACs compared VKAs.
      • Risk of recurrent VTE was 30% lower in patients who received LMWHs compared to VKAs.
      • Overall rates of major bleedings were similar among the 3 treatment groups.

      Abstract

      Background

      Low-molecular-weight heparins (LMWHs) are the recommended treatment for cancer-associated venous thrombosis (CAT). Recent evidences suggest a role for direct-acting oral anticoagulants (DOACs) in this clinical setting.

      Methods

      To evaluate the efficacy and safety of different anticoagulants we performed a network meta-analysis of RCTs including patients with CAT treated with LMWHs, vitamin K antagonists (VKAs) or DOACs. MEDLINE and EMBASE were searched up to February 2018. The primary efficacy and safety outcomes were recurrent VTE and major bleeding, respectively.

      Results

      Overall, 4720 CAT patients from 12 studies were included: 1430 from 2 studies comparing DOACs with LMWHs, 1212 from 4 studies comparing DOACs with VKAs and 2078 from 6 studies comparing VKAs to LMWHs.
      Recurrent VTE occurred in 4.9% of patients receiving DOACs, 9.6% receiving VKAs and 8.4% receiving LMWHs. The network meta-analysis showed a not significant increase of recurrent VTE in patients receiving LMWHs compared to those receiving DOACs (RR 1.3, 95% CI 0.9 to 2.0). The risk of recurrent VTE was higher in patients receiving VKAs compared to LMWHs (RR 1.5, 95% CI 1.0 to 2.0) or DOACs (RR 2.0, 95% CI 1.3 to 3.0) with no heterogeneity.
      Major bleeding occurred in 4.9, 4.1 and 4.3% of patients with CAT treated with DOAC, VKA or LMWH, respectively. No significant differences were observed from the direct, indirect and network meta-analyses.

      Conclusion

      In patients with CAT, DOACs showed a good efficacy and safety profile compared to other anticoagulants and is candidates to be an alternative to LMWHs.

      Keywords

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