| |
| Strong evidence: provided by consistent, statistically significant findings in outcome measures in at least two high quality RCTs. |
| Moderate evidence: provided by consistent, statistically significant findings in outcome measures in at least one high quality RCT and at least one low quality RCT or a high quality CCT. |
| Limited evidence: provided by statistically significant findings in outcome measures in at least one high quality RCT; or provided by consistent, statistically significant findings in outcome measures in at least two high quality CCTs (in the absence of high quality RCTs). |
| Indicative evidence: provided by statistically significant findings in outcome and or process measures in at least one high quality CCT or low quality RCT (in the absence of high quality RCTs). |
| No/ insufficient evidence: Results of eligible studies do not meet the criteria for one of the above stated levels of evidence; or no eligible studies. |
| Conflicting evidence: (statistically significant positive and statistically significant negative) results among RCTs and CCTs; or no eligible studies |
