Fig. 1From: Evaluation of AMSTAR to assess the methodological quality of systematic reviews in overviews of reviews of healthcare interventionsAMSTAR assessments (a), and inter-rater reliability (b), for Cochrane and non-Cochrane systematic reviews. * p < 0.001 in favour of Cochrane systematic reviews (independent samples t-test); † Mean inter-rater reliability was one level higher for Cochrane compared to non-Cochrane SRs (“almost perfect” vs. “substantial”)Back to article page