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Describe the "levels of evidence" and provide an exampleof the type of practice change that could result from each.Level of evidence is “hierarchy of research methods based on quality of results” (Helbig, 2018).It is assigned to “studies based on the methodological quality of their design, validity, andapplicability to patient care" (North Virginia Community College (NVCC), 2020). Starting fromlevel one which is highest and working down the pyramid, the levels include “meta-analyses/systematic reviews, critically-appraised topics (evidence syntheses), critically-appraisedindividual articles (article synopses), randomized controlled trials, cohort studies, case-controlledstudies, and background information and expert opinions (NVCC, 2020). Systematic reviews/meta-analysis, critically-appraised topics/articles and critically-appraised individual articles haveall gone through an evaluation process thus they are filtered while case-controlled studies, cohortstudies, and randomized controlled trials are considered unfiltered information.