Fig. 3From: Letter the editor: serious methodological concerns about a recently published meta-analysis on oxygen therapyMeta-analysis of mesenteric ischaemia at longest follow-up. M-H, Fixed denotes Mantel–Haenszel fixed-effect model, CI confidence interval. Chen et al. reported the RR for mesenteric ischaemia as 1.15 (95% CI 0.73–1.19)Back to article page