Table 2.
The results of Newcastle-Ottawa scale (NOS) risk of bias assessment
|
The first author
(Reference) |
Selection
(out of 4) |
Comparability
(out of 2) |
Exposure/ Outcome
(out of 3) |
Total score
(out of 9) |
|---|---|---|---|---|
| A.Erice(19) | *** | - | ** | 5 |
| J.Favresse(20) | *** | * | ** | 6 |
| W.Gou(21) | *** | - | *** | 6 |
| J.F. Hedges(24) | **** | * | ** | 7 |
| P.Naaber(16) | **** | * | ** | 7 |
| M.Pouquet(26) | *** | * | *** | 7 |
| E. Terpos(18) | **** | * | * | 6 |
| S. J. Thomas(9) | **** | * | ** | 7 |
| M. Tré-Hardy(17) | *** | * | *** | 7 |
| I.Vicenti(27) | **** | * | *** | 8 |
| I.Waldhorn(22) | **** | * | *** | 8 |
| K. Zakaria(25) | **** | * | ** | 7 |