Welcome to the PRISMA Statement website

PRISMA stands for Preferred Reporting Items for Systematic Reviews and Meta-Analyses. It is an evidence-based minimum set of items for reporting in systematic reviews and meta-analyses.

The aim of the PRISMA Statement is to help authors improve the reporting of systematic reviews and meta-analyses. We have focused on randomized trials, but PRISMA can also be used as a basis for reporting systematic reviews of other types of research, particularly evaluations of interventions. PRISMA may also be useful for critical appraisal of published systematic reviews, although it is not a quality assessment instrument to gauge the quality of a systematic review.

The PRISMA Statement consists of a 27-item checklist and a four-phase flow diagram. It is an evolving document that is subject to change periodically as new evidence emerges. In fact, the PRISMA Statement is an update and expansion of the now-out dated QUOROM Statement. This website contains the current definitive version of the PRISMA Statement.

We invite readers to comment on the PRISMA Statement by contacting us.

The PRISMA Explanation and Elaboration document explains and illustrates the principles underlying the PRISMA Statement. It is strongly recommended that it be used in conjunction with the PRISMA Statement.

PRISMA is part of a broader effort, to improve the reporting of different types of health research, and in turn to improve the quality of research used in decision-making in healthcare.

Please join PRISMA in supporting the All Trials campaign to get all clinical trial results reported

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Register your systematic review protocols at PROSPERO (click on the link to the left). PROSPERO is the first online facility to prospectively register systematic reviews (via their protocol). PROSPERO is a global initiative led by the Centre for Reviews and Dissemination, University of York.

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