Edition : 3
Year : 2014
Description :
The Latin characters I, II, III indicate the Class of Recommendation of the reviewed literature.
I: There is evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective.
II: There is conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure.
- II a: the weight of evidence is in favour of the usefulness/ efficacy of the treatment or procedure and should therefore be considered.
- IIb: the usefulness/efficacy of the treatment or procedure is less well established by evidence/opinion and therefore may be considered.
III: There is evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful.
The letters A, B, C indicate the level of evidence available in the reviewed literature, i.e., the strength of the results described in the guideline.
- A: Data is derived from multiple well-designed randomized controlled trials or meta-analysis with a number of participants of sufficient statistical power.
- B: Data is derived from at least one large well-designed clinical trial with or without randomization, from cohort or case-control analytic studies, or well-designed meta-analysis.
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