Table 4.
Results of simple meta-regressions of continuous variables on effect sizes for obsessive-compulsive measures.
| Cluster/moderator variable | k | bj | t | p | R2 |
|---|---|---|---|---|---|
| Treatment duration | 11 | -0.035 | -0.60 | .566 | .00 |
| Treatment intensity | 10 | 0.035 | 0.23 | .882 | .00 |
| Treatment magnitude | 10 | -0.012 | -0.67 | .519 | .00 |
| Mean age | 10 | -0.001 | -0.31 | .310 | .00 |
| Gender | 10 | -0.008 | -0.78 | .459 | .00 |
| Attrition postest | 11 | -0.613 | -0.37 | .721 | .00 |
| Sample size | 11 | -0.019 | -2.76 | .022 | .52 |
| Methodological quality | 11 | 0.171 | 1.26 | .238 | .15 |
Note. ** p < .001. k = number of studies. bj = regression coefficient. t = statistic for testing significance of each predictor. p = probability level for the t statistic. R2 = proportion of variance accounted for by the predictors.