Table 4. A summary of quality appraisal, by criterion.
| Criterion | Quality assessment of studies | |
|---|---|---|
| Met criterion | Did not meet | |
| Outcome measures | 28 | 10 |
| Background/literature review | 37 | 1 |
| Sample | 22 | 16 |
| Study design or methodology | 29 | 9 |
| Conclusions | 35 | 3 |
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