Collates all that is known on a given topic and identifies the basis of that knowledge.Identifies, appraises and synthesizes all available research that is relevant to a particular review question.May include a meta-analysis (quantitative synthesis) *optional.Explicit methods of extracting and synthesizing study findings (qualitative or quantitative).Application of established standards to critically appraise study quality.Use of explicit criteria to include / exclude studies.Comprehensive search to find all relevant studies.The scope of the review is identified in advance (eg review question and sub‐questions and/or sub‐group analysis to be undertaken).Biases that occur in selecting and assessing the literature are unknown. ![]() The writers assumptions and agenda often unknown.To scope the types of interventions available to include in a review.Often used as rationale for new research. ![]()
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