level of Evidence for scientific studies

31
Jan

Levels of evidence

Level of evidence A	Data derived from multiple randomised clinical trials or meta-analyses
Level of evidence B	Data derived from a single randomised clinical trial or large non-randomised studies
Level of evidence C	Consensus of experts opinion and/or small studies, retrospective studies, and registries

Obviously, Level A evidence is the most ideal and best level of evidence when formulating recommendations for clinical patient care.

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