Figure 1From: The importance of adjusting for potential confounders in Bayesian hierarchical models synthesising evidence from randomised and non-randomised studies: an application comparing treatments for abdominal aortic aneurysms Estimated overall (μ) and study type (θ 1 , θ 2 ) odds ratios from Bayesian hierarchical models. Perioperative mortality in studies of EVAR and OSR for the treatment of abdominal aortic aneurysms (four randomised controlled trials and 40 non-randomised studies)Back to article page