Methodology Review

Publication bias in clinical trials due to statistical significance or direction of trial results

  1. Sally Hopewell1,*,
  2. Kirsty Loudon1,
  3. Mike J Clarke1,
  4. Andrew D Oxman2,
  5. Kay Dickersin3

Editorial Group: Cochrane Methodology Review Group

Published Online: 21 JAN 2009

Assessed as up-to-date: 23 OCT 2008

DOI: 10.1002/14651858.MR000006.pub3

Database Title

Additional Information

How to Cite

Hopewell S, Loudon K, Clarke MJ, Oxman AD, Dickersin K. Publication bias in clinical trials due to statistical significance or direction of trial results. Cochrane Database of Systematic Reviews 2009, Issue 1. Art. No.: MR000006. DOI: 10.1002/14651858.MR000006.pub3.

Author Information

  1. 1

    UK Cochrane Centre, Oxford, Oxfordshire, UK

  2. 2

    Norwegian Knowledge Centre for Health Services, Oslo, Norway

  3. 3

    Johns Hopkins University, Center for Clinical Trials and US Cochrane Center, Baltimore, MD, USA

*Sally Hopewell, UK Cochrane Centre, National Institute for Health Research, Summertown Pavilion, Middle Way, Oxford, Oxfordshire, OX2 7LG, UK. shopewell@cochrane.co.uk.

Publication History

  1. Publication Status: New
  2. Published Online: 21 JAN 2009

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  1. Current Version

    Publication bias in clinical trials due to statistical significance or direction of trial results

    Sally Hopewell, Kirsty Loudon, Mike J Clarke, Andrew D Oxman and Kay Dickersin

    Article first published online: 21 JAN 2009 | DOI: 10.1002/14651858.MR000006.pub3

Previous versions of this article and their online publication dates

  1. Version 2

    Publication bias in clinical trials

    Sally Hopewell, Kay Dickersin, Mike J Clarke, Andrew D Oxman and Kirsty Loudon

    Article first published online: 8 OCT 2008 | DOI: 10.1002/14651858.MR000006.pub2

  2. Version 1

    Publication bias in clinical trials

    KL Olsen, S Hopewell, K Dickersin, M Clarke and AD Oxman

    Article first published online: 24 JAN 2007 | DOI: 10.1002/14651858.MR000006

View Full Article (HTML) Summary (64K)Standard (293K)Full (317K)