A systematic review aims to answer a focussed research question through a structured review of the evidence, using a predefined methodology, which often includes a meta-analysis. A meta-analysis is a statistical method used to combine the effect estimates from the individual studies included in a systematic review. Systematic reviews and meta-analyses are positioned at the highest level in the hierarchy of clinical evidence. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was introduced in 2009 to help authors improve the quality and reliability of systematic reviews and meta-analyses. Recently, the volume of systematic reviews and meta-analyses in the field of Endodontology has increased; however, the quality of the published manuscripts has been reported to be sub-optimal, which does not take account of the systematic reviews that were rejected because of more obvious deficiencies. The aim of this paper is to present a comprehensive glossary of terminology commonly used in systematic reviews and meta-analyses in an attempt to provide easily understood definitions and explanations to assist authors when reporting systematic reviews and meta-analyses and to allow those wishing to read them to become better informed.

中文翻译：

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系统评价和荟萃分析词汇表。

系统评价旨在通过使用预先定义的方法（通常包括荟萃分析）对证据进行结构化评价来回答重点研究问题。荟萃分析是一种统计方法，用于结合系统评价中包含的各个研究的效果估计。系统评价和荟萃分析位于临床证据等级的最高级别。系统评价和荟萃分析的首选报告项目 (PRISMA) 声明于 2009 年推出，旨在帮助作者提高系统评价和荟萃分析的质量和可靠性。最近，牙髓病学领域的系统评价和荟萃分析的数量有所增加；然而，据报道，已发表手稿的质量并不理想，这没有考虑由于更明显的缺陷而被拒绝的系统评价。本文的目的是提供系统评价和荟萃分析中常用的综合术语表，以提供易于理解的定义和解释，以帮助作者在报告系统评价和荟萃分析时，并让那些希望阅读他们变得更好地了解情况。