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Quality assessment of included cohort studies.
| Study name | Selection | Comparability | Outcome | Total score | Included/excluded |
|---|---|---|---|---|---|
| Ouldali et. al. | 3 | 2 | 1 | 6 | Included |
| McArdle et. al. | 2 | 2 | 1 | 5 | Included |
| Son et. al. | 2 | 2 | 1 | 5 | Included |
Mean scores greater than or equal to 5 are included in the analysis.
