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Results of k-means cluster analysis
| Magnitude of effect | Number of interventions | SMD | |
|---|---|---|---|
| Mean | Range | ||
| Small | 9 | 5.15 | 2.25–7.89 |
| Medium | 5 | 11.77 | 9.66–13.68 |
| Large | 1 | 22.51 | NA |
Four effect sizes were excluded from k-means cluster analysis (three outliers and one non-effect)
SMD standardized mean difference, NA not applicable
