Study |
Type of study |
Selection |
Comparability |
Outcome/exposure |
Overall |
Madasu et al. |
Cohort |
2 (*) |
1 (*) |
0 (*) |
Poor
Quality |
Scasso et al. |
Case and controls |
3 (*) |
0 (*) |
1 (*) |
Poor
Quality |
Fernandez et al. |
Cohort |
3 (*) |
1 (*) |
3 (*) |
High
Quality |
Ishikawa et al. |
Cohort |
3 (*) |
1 (*) |
3 (*) |
High
Quality |
Ekborn et al. |
Cohort |
2 (*) |
0 (*) |
1 (*) |
Poor
Quality |