Table 6.
Multiple meta-regression analysis, predicting between-study variance in multidimensional outcomes using the level of similarity between active and sham control groups for a number of selected features in other manual therapy trials.
| Descriptives | |||||||
|---|---|---|---|---|---|---|---|
| Mean ES | Mean (SD) similarity rating (number of sessions) | Mean (SD) similarity rating (efficacy information) | Mean (SD) similarity rating (environment) | R 2 | k | ||
| −0.37 | 1.7 (0.88) | 0.5 (0.8) | 1.6 (0.7) | 0.37 | 22 | ||
| Homogeneity analysis | |||||||
|---|---|---|---|---|---|---|---|
| Q | Df | P | T 2 | I2 | |||
| Model | 9.97 | 3 | 0.0188 | 0.02 | 69.9% | ||
| Residual | 16.85 | 18 | 0.5338 | 0.00 | 0% | ||
| Total | 26.82 | 21 | 0.18 | ||||
| Regression coefficients | |||||||
|---|---|---|---|---|---|---|---|
| B | SE | −95% CI | +95% CI | Z | P | Beta | |
| Constant | −0.27 | 0.44 | −1.13 | −0.6 | −0.61 | 0.54 | 0.0 |
| Similarity: number of sessions | −0.34 | 0.14 | −0.62 | −0.05 | −2.32 | 0.0203 | −0.47 |
| Similarity: environment | 0.29 | 0.19 | −0.08 | 0.66 | 1.56 | 0.12 | 0.31 |
| Similarity: efficacy information | 0.02 | 0.15 | −0.27 | 0.32 | 0.17 | 0.87 | 0.03 |
| Method of moments random effects variance component | |||||||
| v = 0.22 | |||||||
Means and variance of the similarity ratings included in the model are provided, having a possible range of −2 (different for all studies) to 2 (similar across all studies).