Table 1 Quality assessment according to the NOS of each cohort study
Study | Selection | Comparability | Outcome | Total score |
|---|---|---|---|---|
Buchalter, D. B | 3 | 2 | 3 | 8 |
Cohen, E. M | 4 | 2 | 3 | 9 |
Dial, B. L | 3 | 2 | 3 | 8 |
Khatri, K | 3 | 2 | 3 | 8 |
Koutalos, A. A | 4 | 2 | 3 | 9 |
Otte, J. E | 3 | 2 | 2 | 7 |
Patel, N. N | 3 | 2 | 3 | 8 |
Tahmasebi, M. N | 3 | 2 | 3 | 8 |
Winkler, C | 3 | 2 | 2 | 7 |
Xu, X | 3 | 2 | 3 | 8 |
Yavuz, I. A | 3 | 2 | 3 | 8 |
Riesgo | 3 | 2 | 3 | 8 |
Hanada | 3 | 2 | 3 | 8 |
Matziolis,G | 3 | 2 | 3 | 8 |