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Research quality by study design.
| Qualitative | Quantitative |
Mixed methods |
|
|---|---|---|---|
| Number of studies | 54 | 59 | 34 |
| Comparison group | 1 | 26 | 12 |
| Average research quality (−10 to +10) | 5.39 | 5.18 | |
| Standard deviation of research quality | 3.57 | 2.84 | |
| Research quality of 5 or greater | 65% | 61% | |
| Research quality of 7 or greater | 25% | 50% |
Mixed methods research quality was assessed separately for quantitative and qualitative components.
