| Explanatory variable | Coefficient (B) | 95% confidence interval | Statistical significance (p) | Proportion of heterogeneity explained (R2) | Interpretation |
| Country | 0.18 | 0.01 to 0.36 | .037 | 0.23 | Studies form German‐speaking countries result statistically significant in 0.18 higher effect size estimates on average than studies form non‐German‐speaking countries. |
| Precision | 0.03 | 0 to 0.06 | .065 | 0.18 | No statistically significant association was found. |
| Baseline HAMD | 0.01 | ‐0.02 to 0.04 | .546 | 0.02 | No statistically significant association was found. |
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