Before you start searching, it is important to understand that the quality of evidence between sources and studies can vary greatly.
In practicing evidence-based medicine, you want to choose research that represents the highest level of evidence. The pyramid below demonstrates the EBM hierarchy and corresponds to increasing rigour, quality, and reliability of the evidence for different types of study designs. We can become more confident that a study's results are accurate as we move up the pyramid.
To learn more, click on the individual icons or plus signs in the pyramid.
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What if there is no high-level evidence sources or filtered literature on your topic?
Filtered articles may not always be available. In this case, you will need to search for primary or unfiltered evidence. Just remember to be vigilant of the validity and reliability of the studies you find.