In a nutshell, a systematic review is a secondary study from a collection of primary studies (original research) that pertain to a specific research question. Those primary studies have been analyzed, examined, appraised, and evaluated for the highest level of evidence and quality of methodology, in order to provide the best answer to a research question.
The methods and/or protocol of conducting a systematic review are clear, understandable, rigorous and transparent. In a systematic review, you should see:
Additional Definitions:
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Systematic reviews are often confused with review articles. This type of publication are often called narrative reviews or literature reviews.
Literature reviews (or narrative reviews or review articles) are valuable and help to build one's knowledge base on a topic. However, they are quite different from systematic reviews.
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