BACKGROUND In the last years, overviews of systematic reviews, or umbrella reviews, have seen a dramatic increase in their use. An overview aims to provide a summary of the included reviews and will often examine research questions beyond those addressed in the systematic reviews being synthesised. The purpose of this article is to provide some recommendations on how overviews should be conducted and reported. METHOD A literature review was performed to identify relevant papers on both methodological and applied overviews. RESULTS The current literature recommends carrying out overviews by following similar steps to those of systematic reviews: (a) Defining the overview research question; (b) inclusion and exclusion criteria; (c) literature search; (d) data extraction; (e) assessment of risk of bias and reporting quality; (f) overview results; and (g) reporting the overview. Of special interest is how to address dependencies between the systematic reviews. CONCLUSIONS Overviews allow evidence to be efficiently combined from multiple systematic reviews. This offers the possibility of translating and summarizing large amounts of information. As in primary studies and systematic reviews, conducting and reporting of overviews must meet appropriate quality standards.

中文翻译：

---

评论概述：概念和发展。

背景技术在过去几年中，系统评价的概述或综合评价的使用急剧增加。概述旨在提供所包含评论的摘要，并且通常会检查超出正在综合的系统评论中解决的研究问题。本文的目的是就如何进行和报告概述提供一些建议。方法 进行文献回顾以确定有关方法论和应用概述的相关论文。结果 目前的文献建议按照与系统评价类似的步骤进行综述： (a) 定义综述研究问题；(b) 纳入和排除标准；(c) 文献检索；(d) 数据提取；(e) 评估偏倚风险和报告质量；(f) 概览结果；(g) 报告概述。特别感兴趣的是如何解决系统评价之间的依赖关系。结论 概述允许有效地结合来自多个系统评价的证据。这提供了翻译和总结大量信息的可能性。与初级研究和系统评价一样，概述的实施和报告必须符合适当的质量标准。