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. 2015 Jun 10;15:49. doi: 10.1186/s12874-015-0034-x

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© Kulinskaya and Dollinger. 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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Power when the log odds ratio θ=3 and N=150. Power for the three tests Q _γ (solid line), BD (dot-dash), and $Q_{χ^{2}}$ (dash) plotted against τ, the square root of the random effect variance. Here all studies have the parameters: 150 subjects in each study with equal arms of 75 each (N=150 and q=1/2) and the log odds ratio θ=3.