Reporting of (A) blinding, (B) randomization and (C) sample size calculation in the middle cerebral artery occlusion literature in the 2 years to October 2016 by journal of publication for journals with five or more relevant manuscripts, ranked by performance. Values represent mean and 95% Clopper–Pearson exact confidence intervals. The grey shaded bar represents the 95% confidence interval of the overall performance across 918 manuscripts.