Table 1 Newcastle-Ottawa Scale and Cochrane Collaboration tool for quality evaluation of the studies
Selection | Comparability | Outcome | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Study | Design | 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 | Total | |
Choi 2012 | R | * | * | * | * | * | * | * | 7 | |
Cornelius 2020 | R | * | * | * | * | ** | * | * | * | 9 |
Joshi 1999 | R | * | * | * | * | * | * | * | * | 8 |
Seitz 2005 | R | * | * | * | * | * | * | * | 7 | |
Random sequence generation | Allocation concealment | Blinding of participant and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other bias | ||||
Bucci 2018 | RCT | Low | Unclear | Low | Low | Low | Low | Unclear | ||
Kravchick 2005 | RCT | Low | Unclear | Unclear | Unclear | Low | Low | Low | ||
Kumar 2010 | RCT | Low | Unclear | Low | Low | Low | Low | Low | ||
Tombal 2005 | RCT | Unclear | Unclear | Unclear | Low | Low | Low | Low | ||
Uguz 2012 | RCT | Low | Low | Low | Low | Low | Low | Unclear | ||