Results of the logistic regression analysis
| OR | 95% CI | P value | |
| Effect size indices | |||
| CER and EER | (Ref) | ||
| RD | 0.91 | 0.73 to 1.11 | 0.332 |
| RoM | 0.83 | 0.67 to 1.02 | 0.070 |
| NNT | 0.80 | 0.65 to 0.98 | 0.033 |
| SMD | 0.78 | 0.63 to 0.96 | 0.018 |
| RR | 0.66 | 0.54 to 0.82 | <0.001 |
| MD | 0.66 | 0.54 to 0.82 | <0.001 |
| MID unit | 0.56 | 0.46 to 0.69 | <0.001 |
| Magnitude of effect size | |||
| Small effect size | (Ref) | ||
| Medium effect size | 0.56 | 0.49 to 0.64 | <0.001 |
| Large effect size | 0.51 | 0.45 to 0.58 | <0.001 |
| Experience/knowledge in health research practice (vs none) | 1.13 | 1.00 to 1.28 | 0.048 |
| Mental health professions (vs others) | 0.96 | 0.85 to 1.08 | 0.487 |
| Experience in conducting systematic reviews (vs none) | 1.00 | 0.85 to 1.18 | 0.983 |
CER and EER, control event rate and experimental event rate; MD, mean difference; MID unit, difference in minimal importance difference units; NNT, number needed to treat; RD, risk difference; RoM, ratio of means; RR, risk ratio; SMD, standardised mean difference.