Evidence Based Practice Tools Summary
Pyramid modified from: Navigating the Maze, University of Virginia, Health Sciences Library, by University of Washington. Health Sciences Library and Information Center
Hierarchy of Evidence Summary
Level I: Evidence of a systematic review or meta analysis of all relevant randomized controlled trials (RCT), or evidence-based clinical practice guidelines based on the above.
Level II: Evidence from at least 1 RCT.
Level III: Evidence from controlled trials without randomization.
Level IV: Evidence from case-control and cohort studies.
Level V: Evidence from systematic reviews of descriptive and qualitative studies.
Level VI: Evidence from a single descriptive or qualitative study.
Level VII: Evidence from the opinion of authorities and/or reports of expert committees.