Table 2
Strength of conclusion
| Level | Conclusion based on |
|---|---|
| 1 | A1 study or ≥2 A2-level studies |
| 2 | One A2-level study or ≥2 independent B-level studies |
| 3 | One B-level or C-level study |
| 4 | Inconclusive or inconsistent results between various studies |
Strength of conclusion
| Level | Conclusion based on |
|---|---|
| 1 | A1 study or ≥2 A2-level studies |
| 2 | One A2-level study or ≥2 independent B-level studies |
| 3 | One B-level or C-level study |
| 4 | Inconclusive or inconsistent results between various studies |