The PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) reporting guidelines are designed to improve the reporting of systematic reviews. PRISMA assists authors to completely report why their systematic review was done, what methods they used, and what they found. Evidence from observational studies suggests that use of the PRISMA statement is associated with more complete reporting of systematic reviews.
The main PRISMA reporting guideline (the PRISMA 2020 statement) primarily provides guidance for the reporting of systematic reviews evaluating the effects of interventions. PRISMA 2020 is complemented by various PRISMA extensions, which provide guidance for the reporting of different types or aspects of systematic reviews and other types of evidence synthesis (e.g. scoping reviews).
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