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Evidence Pyramid: Systematic reviews and meta-analysis are at the top of what is known as the “Evidence Pyramid”. As you move up the pyramid the amount of available evidence on a given topic decreases, but the relevancy and quality of that evidence increases. Systematic reviews and meta-analysis are considered to be the highest quality evidence on a clinical topic. However, you may not always be able to find the highest level of evidence to answer your question. You then need to consider moving down the pyramid.
Source: “EBM Pyramid.” Digital Image. Eli M. Oboler Library, 27 May 2016
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