{Reference Type}: Journal Article {Title}: An appraisal of meta-analysis guidelines: how do they relate to safety outcomes? {Author}: Bennetts M;Whalen E;Ahadieh S;Cappelleri JC; {Journal}: Res Synth Methods {Volume}: 8 {Issue}: 1 {Year}: Mar 2017 {Factor}: 9.308 {DOI}: 10.1002/jrsm.1219 {Abstract}: Although well developed to assess efficacy questions, meta-analyses and, more generally, systematic reviews, have received less attention in application to safety-related questions. As a result, many open questions remain on how best to apply meta-analyses in the safety setting. This appraisal attempts to: (i) summarize the current guidelines for assessing individual studies, systematic reviews, and network meta-analyses; (ii) describe several publications on safety meta-analytic approaches; and (iii) present some of the questions and issues that arise with safety data. A number of gaps in the current quality guidelines are identified along with issues to consider when performing a safety meta-analysis. While some work is ongoing to provide guidance to improve the quality of safety meta-analyses, this review emphasizes the critical need for better reporting and increased transparency regarding safety data in the systematic review guidelines. Copyright © 2016 John Wiley & Sons, Ltd.