%0 Journal Article %T An appraisal of meta-analysis guidelines: how do they relate to safety outcomes? %A Bennetts M %A Whalen E %A Ahadieh S %A Cappelleri JC %J Res Synth Methods %V 8 %N 1 %D Mar 2017 %M 27612447 %F 9.308 %R 10.1002/jrsm.1219 %X 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.