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Quality assessment of cohort studies according to the Newcastle Ottawa Scale (NOS)
| Author | Selection | Comparability | Exposure | Total score |
|---|---|---|---|---|
| Hoffman et al. | 2 | 2 | 3 | 7 |
| Marengo et al. | 3 | 2 | 3 | 8 |
| Takenaka et al. | 2 | 2 | 3 | 7 |
| Sakaura et al. | 3 | 2 | 3 | 8 |
| Chin et al. | 3 | 2 | 3 | 8 |
| Sakaura et al. | 3 | 2 | 3 | 8 |
| Orita et al. | 3 | 2 | 2 | 7 |
| Hung et al. | 3 | 2 | 3 | 8 |
| Ninomiya et al. | 3 | 2 | 2 | 7 |
| Peng et al. | 3 | 2 | 3 | 8 |
