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. 2015 Sep 4;8:414. doi: 10.1186/s13104-015-1386-3

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© Dardis et al. 2015

Open AccessThis 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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Fig. 2 — Graph showing the relationship between required hazard ratio and sample size. Sample size is plotted on a log scale (base 10). Significance (alpha, two-sided) = 0.05. Power = 80 %