Study | Design | Selection | Comparability | Outcome | Total | |||||
---|---|---|---|---|---|---|---|---|---|---|
Representativeness of exposed cohort | Selective of nonexposed Cohort | Ascertainment of exposure | Outcome not present at start | Assessment of outcome | Adequate follow-up length | Adequacy of follow-up | ||||
Abu-Ghanem | P, S | * | * | * | * | ** | * | * | * | 9 |
Chang 2017 | R, S | * | * | * | * | * | * | * | * | 8 |
Sayyid | P, S | * | * | * | * | ** | * | * | * | 9 |
Dalela | R, S | * | * | * | * | * | * | * | * | 8 |
Lim | P, S | * | * | * | * | ** | * | * | * | 9 |
Chang 2018 | R, S | * | * | * | * | * | * | * | * | 8 |
Randomization | Allocation concealment | Blinding | Quality level | |||||||
Asimakopoulos | RCT | Adequate | Unclear | Unclear | Clear | |||||
Menon | RCT | Adequate | Unclear | Unclear | Unclear |