A Cochrane review (abstract , review [Abstract]) included 10 studies with a total of 1 048 patients. In the first meta-analysis (7 studies, 578 patients), mean percentage of rebleeding in H. pylori eradication therapy group was 2.9%, and in the non-eradication therapy group without subsequent long-term maintenance antisecretory therapy it was 20% (OR 0.17, 95% CI 0.10 to 0.32; there was no statistical evidence of heterogeneity; NNT was 7, 95% CI 5 to 11). In the second meta-analysis (3 studies, 470 patients), mean percentage of rebleeding in H. pylori eradication group was 1.6%, compared to 5.6% in antisecretory therapy group with long-term maintenance (OR 0.25, 95% CI 0.08 to 0.76; NNT = 20, 95% CI 12 to 100).
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