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Rivaroxaban was not found to be superior to aspirin in preventing venous thromboembolism after hip or knee arthroplasty in this meta-analysis. Comment: Authors state that studies to date are generally of low quality and recommend further investigation. Theoretically an anticoagulant (rivaroxaban) should be superior to an antiplatelet agent (aspirin) but the was not found to be true in this study. J Orthop Surg (Hong Kong). 2020 Jan-Apr;28(1):2309499019896024    (retrieved Jan, 2020). There are currently 1090 pearls in the database. While every attempt has been made to ensure accuracy, mistakes can and do occur. Use databank at your own risk. All pearls © 2024 by the Internet Medical Association. Click Here to view more medical pearls.