| Class I | Evidence and/or general agreement that a given diagnostic procedure/treatment is beneficial, useful, and effective |
| Class II | Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the treatment or procedure |
| Class IIa | Weight of evidence/opinion is in favour of usefulness/efficacy |
| Class IIb | Usefulness/efficacy is less well established by evidence/opinion; |
| Class III | Evidence or general agreement that the treatment or procedure is not useful/effective and in some cases may be harmful |
| Class I | Evidence and/or general agreement that a given diagnostic procedure/treatment is beneficial, useful, and effective |
| Class II | Conflicting evidence and/or a divergence of opinion about the usefulness/efficacy of the treatment or procedure |
| Class IIa | Weight of evidence/opinion is in favour of usefulness/efficacy |
| Class IIb | Usefulness/efficacy is less well established by evidence/opinion; |
| Class III | Evidence or general agreement that the treatment or procedure is not useful/effective and in some cases may be harmful |
This PDF is available to Subscribers Only
View Article Abstract & Purchase OptionsFor full access to this pdf, sign in to an existing account, or purchase an annual subscription.
