Clinical research questions are often framed using the abbreviation PICO. The elements of a PICO question are:
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Starting with the top of the pyramid, Filtered evidence includes:
Critically Appraised Topics and Articles
Unfiltered Evidence includes:
Randomized Control Trials, Cohort Studies, Case-Controlled Studies/Case Studies/Reports
The base of the pyramid rests on Background Information and/or Expert Opinion
An important part of EBP is forming a good clinical question and finding and evaluating the evidence relating to the question. See the pyramid below for a quick overview of the ranking of information in EBP.
You can use this guide to help you know what library resources to use for your EBP questions. Go to the Search EBP Databases tab for more.
The Critical Appraisal Skills Programme (CASP) provides checklists that may be useful for evaluating different types of evidence. The Systematic Review and Randomised Controlled Trials checklists are linked below: