Table 2.
Pooled effects of psychotherapies for adult depression
| k | g | 95% CI | I2 | 95% CI | 95% PI | NNT | |
|---|---|---|---|---|---|---|---|
| All comparisons (combined) | 353 | 0.71 | 0.64; 0.79 | 82 | 80; 84 | −0.48; 1.91 | 4.26 |
| One ES/study (lowest) | 300 | 0.63 | 0.55; 0.71 | 82 | 80; 84 | −0.53; 1.78 | 4.95 |
| One ES/study (highest) | 300 | 0.72 | 0.64; 0.80 | 83 | 81; 84 | −0.49; 1.93 | 4.2 |
| Outliers removed | 248 | 0.62 | 0.58; 0.65 | 23 | 9; 35 | 0.39; 0.84 | 5.04 |
| Influence analysis | 343 | 0.62 | 0.56; 0.68 | 74 | 72; 77 | −0.22; 1.45 | 5.05 |
| Only risk of bias > 3 | 115 | 0.45 | 0.36; 0.54 | 73 | 68; 78 | −0.3; 1.20 | 7.31 |
| Three-level model (CHE) | 410 | 0.68 | 0.61; 0.76 | 88 | – | −0.51; 1.88 | 4.49 |
| Publication bias correction | |||||||
| – Trim-and-fill method | 457 | 0.38 | 0.29; 0.48 | 88 | 87; 89 | −1.45; 2.21 | 8.82 |
| – Limit meta-analysis | 353 | 0.25 | 0.14; 0.36 | 93 | – | −0.95; 1.45 | 14.23 |
| – Selection modell | 353 | 0.58 | 0.47; 0.70 | 88 | – | −0.88; 2.05 | 5.38 |
Abbreviations: CHE, “correlated and hierarchical effects” model; CI, confidence interval; ES, effect size; g, Hedges’ g; I2, level of heterogeneity; k, number of comparisons; NNT, number-needed-to-treat; PI, prediction interval.