Table 2 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 |