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. 2020 Jun 6;33(5):485–494. doi: 10.20524/aog.2020.0507

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Copyright: © Hellenic Society of Gastroenterology

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ratios of relative risks (RRR) and 95% confidence intervals for pre-specified contrasts of moderator variables (region and subtype) included in our meta-regression model. RRR represent average effects, pooled over levels of the other moderator in the model. Confidence intervals are adjusted for simultaneous inference using the single-step method. The vertical dashed line at RRR=1 indicates the null effect (confidence intervals that do not include 1 are statistically significant at P<0.05)