Table 2 Definitions of levels of evidence [17]
Level of evidence | Criteria |
|---|---|
Strong evidence | Consistent results in HQ studies (n ≥ 2) |
Moderate evidence | Consistent results among multiple MQ studies (n ≥ 2) |
Limited evidence | Consistent results among multiple LQ studies (n ≥ 2) |
Conflicting evidence | Inconsistent results among multiple studies |
Very limited evidence | Only one LQ or MQ study or multiple VLQ studies |