Letters Oral anticoagulants and gastrointestinal bleeding

Meta-analysis should not be subject to selectivity and imbalance

BMJ 2015; 350 doi: https://doi.org/10.1136/bmj.h3337 (Published 24 June 2015) Cite this as: BMJ 2015;350:h3337
  1. L Sam Lewis, retired GP
  1. 1NHS Surgery, Newport SA42 0TJ, UK
  1. sam{at}garthnewydd.freeserve.co.uk

The final study sample of 46 163 patients included 4907 using dabigatran, 1649 using rivaroxaban, and 39 607 using warfarin. After adjustment for potentially confounding covariates, there was no …

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