Describe the "levels of evidence" and provide an example of the type of practice change that could result from each.
Ans) Levels of evidence (sometimes called hierarchy of evidence) are assigned to studies based on the methodological quality of their design, validity, and applicability to patient care.
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Level of evidence (LOE) |
Description |
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Level I |
Evidence from a systematic review or meta-analysis of all relevant RCTs (randomized controlled trial) or evidence-based clinical practice guidelines based on systematic reviews of RCTs or three or more RCTs of good quality that have similar results. The Optic Neuritis Treatment Trial1 is an example of a randomized clinical trial which contains level 1 evidence. |
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Level II |
Evidence obtained from at least one well-designed RCT (e.g. large multi-site RCT). |
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Level III |
Evidence obtained from well-designed controlled trials without randomization (i.e. quasi-experimental). |
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Level IV |
Evidence from well-designed case-control or cohort studies. |
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Level V |
Evidence from systematic reviews of descriptive and qualitative studies (meta-synthesis). |
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Level VI |
Evidence from a single descriptive or qualitative study. |
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Level VII |
Evidence from the opinion of authorities and/or reports of expert committees. |
Describe the "levels of evidence" and provide an example of the type of practice change that...
Describe the levels of evidence and provide an example of the type of practice change that could result from each..
Describe the "levels of evidence" and provide an example of the type of practice change that could result from each.
Describe the "levels of evidence" and provide an example of the type of practice change that could result from each.
Describe the "levels of evidence" and provide an example of the type of practice change that could result from each.
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