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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

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The original article was published in Trials 2018 19:542

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.

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Author information

Correspondence to Jonathan Alistair Cook.

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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.

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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) doi:10.1186/s13063-019-3809-2

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