This methodological guidance article discusses the elements of a high-quality meta-analysis that is conducted within the context of a systematic review. Meta-analysis, a set of statistical techniques for synthesizing the results of multiple studies, is used when the guiding research question focuses on a quantitative summary of study results. In this guidance article, we discuss the systematic review methods that support high-quality meta-analyses and outline best practice meta-analysis methods for describing the distribution of effect sizes in a set of eligible studies. We also provide suggestions for transparently reporting the methods and results of meta-analyses to influence practice and policy. Given the increasing use of meta-analysis for important policy decisions, the methods and results of meta-analysis should be both transparent and reproducible.

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方法论指导文件：系统评价中的高质量元分析

这篇方法论指导文章讨论了在系统评价的背景下进行的高质量荟萃分析的要素。Meta 分析是一组用于综合多项研究结果的统计技术，当指导性研究问题侧重于研究结果的定量总结时使用。在这篇指导文章中，我们讨论了支持高质量荟萃分析的系统评价方法，并概述了用于描述一组合格研究中效应量分布的最佳实践荟萃分析方法。我们还为透明地报告荟萃分析的方法和结果提供建议，以影响实践和政策。鉴于越来越多地将元分析用于重要的政策决策，