Table 2 Class of recommendations
From: Role of cardiovascular magnetic resonance in the guidelines of the European Society of Cardiology
Class of recommendation | Definition | Suggested wording to use |
|---|---|---|
Class I | Evidence and/or general agreement that a given treatment or procedure is beneficial, useful, effective. | Is recommended/is indicated |
Class II | Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the given treatment or procedure. | |
Class IIa | Weight of evidence/opinion is in favour of usefulness/efficacy. | Should be considered |
Class IIb | Usefulness/efficacy is less well established by evidence/opinion. | May be considered |
Class III | Evidence or general agreement that the given treatment or procedure is not useful/effective, and in some cases may be harmful. | Is not recommended |