Table 1 Criteria for the best-evidence synthesis
Rating | Study quality | Criterion |
|---|---|---|
Strong evidence | ≥ 2 high quality studies | ≥ 75% consistent findings in these studies |
Moderate evidence | 1 high quality study and/or ≥ 2 moderate quality studies | ≥ 75% consistent findings in these studies |
Limited evidence | 1 moderate quality study and/or ≥ 1 low quality studies | n/a |
Conflicting evidence | ≥ 2 studies of any quality | <  75% consistent findings in these studies |
No evidence | No admissible studies were found | |