Levels of evidence21
| Interpretation | Criteria |
|---|---|
| Strong evidence | Consistent findings in multiple high-quality studies (n>2) |
| Moderate evidence | Consistent findings among multiple lower-quality studies and/or one higher-quality studies |
| Limited evidence | Only one relevant low-quality studies |
| Conflicting evidence | Inconsistent findings among multiple studies |
| No evidence from trials | No randomised controlled trials |