Definition of the quality of evidence (QoE)
| QoE | Definition |
|---|---|
| Strong | Evidence from at least one properly designed RCT |
| Moderate | Evidence from at least one well-designed clinical trial, without randomisation; from cohort or case–control analytic studies (preferably from more than one centre); from multiple time series |
| Low | Evidence from opinions of respected authorities, based on clinical experience, descriptive case studies or reports of expert committees |
RCT, randomised controlled trial.