Concept

Preferred Reporting Items for Systematic Reviews and Meta-Analyses

PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) is an evidence-based minimum set of items aimed at helping scientific authors to report a wide array of systematic reviews and meta-analyses, primarily used to assess the benefits and harms of a health care intervention. PRISMA focuses on ways in which authors can ensure a transparent and complete reporting of this type of research. The PRISMA standard superseded the earlier QUOROM standard. It offers the replicability of a systematic literature review. Researchers have to figure out research objectives that answer the research question, states the keywords, a set of exclusion and inclusion criteria. In the review stage, relevant articles were searched, irrelevant ones are removed. Articles are analyzed according to some pre-defined categories. The aim of the PRISMA statement is to help authors improve the reporting of systematic reviews and meta-analyses. PRISMA has mainly focused on systematic reviews and meta-analysis of randomized trials, but it can also be used as a basis for reporting reviews of other types of research (e.g., diagnostic studies, observational studies). In 1987, Cynthia Mulrow examined for the first time the methodological quality of a sample of 50 review articles published in four leading medical journals between 1985 and 1986. She found that none met a set of eight explicit scientific criteria, and that the lack of quality assessment of primary studies was a major pitfall in these reviews. In 1987, Sacks and colleagues evaluated the quality of 83 meta-analyses, using a scoring method that considered 23 items in six major areas: study design, combinability, control of bias, statistical analysis, sensitivity analysis, and application of results. Results of this research showed that reporting was generally poor; and pointed out an urgent need for improved methods in literature searching, quality evaluation of trials, and synthesizing of the results.

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