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. 2019 Jan 11;19:16. doi: 10.1186/s12874-018-0618-3

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© The Author(s) 2018

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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Fig. 5 — Coverage probabilities and lengths of 95% confidence or credible intervals for the overall effect for OR effects based on the simulated data. The top panel shows the coverage probabilities of treatment effect CIs for the different methods (colours) and adjustments (line types). The grey area indicates the range expected with 95% probability if the coverage is accurate. The bottom panel similarly shows the lengths of 95% confidence or credible intervals. Results are illustrated for a study size of n_i = 100 and a baseline event probability p₀ = 0.7, and are based on 2000 replications per scenario. CM.EL is omitted due to low convergence rates