Fig. 7From: Safety and efficacy of Cox‐Maze procedure for atrial fibrillation during mitral valve surgery: a meta-analysis of randomized controlled trialsCumulative meta-analysis assessing the effect of Cox-Maze procedures on the risk of 1 year all-cause mortality in AF patients having mitral valve surgery. The TSA boundary, which assumes a 10% control event rate and a 25% relative risk reduction with 80% power and a two-sided = 0.01, has not been crossed, indicating that the cumulative evidence is inconclusiveBack to article page