Synonym(s)
level of evidence
DefinitionThis section has been translated automatically.
The quality of clinical studies of phytotherapeutics (see below phytotherapy) is usually classified according to a "level of evidence" LOE from A-D:
- A = highest level with randomized, clinically controlled studies and cohort studies
- B = conclusive, retrospective or investigative cohort studies, case-control studies, and follow-up studies from A
- C = Case descriptions or follow-up studies from B
- D = Expert opinion without scientific background; pure laboratory research.
Prof. Dr. med. Peter Altmeyer