Letters Selecting the right hip replacement

Authors’ reply to Cobb

BMJ 2014; 348 doi: https://doi.org/10.1136/bmj.g1920 (Published 06 March 2014) Cite this as: BMJ 2014;348:g1920
  1. Colin R Howie, consultant orthopaedic surgeon and honorary senior lecturer1,
  2. David F Hamilton, research fellow1
  1. 1Department of Orthopaedics and Trauma, University of Edinburgh, Edinburgh EH16 4SB, UK
  1. colin.howie{at}luht.scot.nhs.uk

Professor Cobb’s comments are broadly in line with our intention when we suggested that registry data should be interpreted cautiously.1 2 Such data demonstrate efficacy (the outcome in general use) well, but not the effect …

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