Skip to main content
Download PDF

Correction to: Choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial – the development of the DELTA2 guidance

Trials volume 20, Article number: 602 (2019) Cite this article

Correction to: Trials (2018) 19:542

https://doi.org/10.1186/s13063-018-2887-x

Following publication of the original article [1], we have been notified of a few mistakes:

  • Figure 1:

    • “1351 titles and abstracts” should read “1322 titles and abstracts”

    • "Stat Biopharm Res" value should be "8" instead of "18"

    • "Stat Med" value should be "226" instead of "74"

    • "Stat Methods Med Res" value should be "74" instead of "226"

    • Results section, Stage 5, first paragraph, the phrase:

      • “It was endorsed by the MRC-NIHR Methodology Advisory Group on March 12, 2018, with minor updating of references and the final version produced on April 18, 2017” should read

      • “It was endorsed by the MRC-NIHR Methodology Advisory Group on March 12, 2018, with minor updating of references and the final version produced on April 18, 2018”.

Reference

  1. 1.

    Sones W, et al. Choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial – the development of the DELTA2 guidance. Trials. 2018;19:542. https://doi.org/10.1186/s13063-018-2887-x.

    Article  PubMed  PubMed Central  Google Scholar 

Download references

Author information

Affiliations

  1. Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Botnar Research Centre, Nuffield Orthopaedic Centre, Windmill Rd, Oxford, OX3 7LD, UK

    William Sones, Doug Altman & Jonathan Alistair Cook

  2. Medical Statistics Group, ScHARR, The University of Sheffield, Regent Court, 30 Regent Street, Sheffield, S1 4DA, UK

    Steven A. Julious, Joanne C. Rothwell & Stephen J. Walters

  3. Health Services Research Unit, University of Aberdeen, Health Sciences Building, Foresterhill, Aberdeen, AB25 2ZD, UK

    Craig Robert Ramsay

  4. Department of Mathematics and Statistics, Lancaster University, Lancaster, LA1 4YF, UK

    Lisa V. Hampson

  5. Statistical Methodology and Consulting, Novartis Pharma AG, Basel, Switzerland

    Lisa V. Hampson

  6. Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King ’ s College London, De Crespigny Park, Denmark Hill, London, SE5 8AF, UK

    Richard Emsley

  7. Department of Health Sciences, Seebohm Rowntree Building, University of York, Heslington, York, YO10 5DD, UK

    Catherine Hewitt & Martin Bland

  8. Clinical Epidemiology Program, Ottawa Hospital Research Institute, 501 Smyth Road, Box 201B, Ottawa, ON, K1H 8L6, Canada

    Dean A. Fergusson

  9. Johnson & Johnson, One J&J Plaza, New Brunswick, NJ, 08933, USA

    Jesse A. Berlin

  10. Health Economics Group, Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK

    Luke David Vale

Authors
  1. William Sones
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Steven A. Julious
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Joanne C. Rothwell
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Craig Robert Ramsay
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Lisa V. Hampson
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Richard Emsley
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Stephen J. Walters
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Catherine Hewitt
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. Martin Bland
    View author publications

    You can also search for this author in PubMed Google Scholar

  10. Dean A. Fergusson
    View author publications

    You can also search for this author in PubMed Google Scholar

  11. Jesse A. Berlin
    View author publications

    You can also search for this author in PubMed Google Scholar

  12. Doug Altman
    View author publications

    You can also search for this author in PubMed Google Scholar

  13. Luke David Vale
    View author publications

    You can also search for this author in PubMed Google Scholar

  14. Jonathan Alistair Cook
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Jonathan Alistair Cook.

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Sones, W., Julious, S.A., Rothwell, J.C. et al. Correction to: Choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial – the development of the DELTA2 guidance. Trials 20, 602 (2019). https://doi.org/10.1186/s13063-019-3809-2

Download citation

Trials

ISSN: 1745-6215