Figure 1From: Systematic review and meta-analysis: the relationship between the Helicobacter pylori dupA gene and clinical outcomesThe results of meta-analysis for the risk of duodenal ulcer in dupA -positive H. pylori infection. Odds ratios (ORs) and their 95% confidence intervals (CI) in summary and for each study are presented with weighting in a fixed-effect model.Back to article page