Selection | Comparability | Outcome | |||||||
---|---|---|---|---|---|---|---|---|---|
Study | Representativeness of the Exposed Cohort | Selection of the Non-Exposed Cohort | Ascertainment of Exposure | Demonstration That Outcome of Interest Was Not Present at Start of Study | Comparability of Cohorts on the Basis of the Design or Analysis | Assessment of Outcome | Was Follow-Up Long Enough for Outcomes to Occur | Adequacy of Follow Up of Cohorts | Quality Score |
Liu 2020 [12] | ★ | ★ | ★ | – | ★★ | ★ | ★ | ★ | 8 |
Mehta 2012 [13] | ★ | ★ | ★ | – | ★★ | ★ | ★ | ★ | 8 |
Sade 2006 [14] | ★ | ★ | ★ | – | ★ | ★ | ★ | ★ | 7 |
Alharbi 2018 [15] | ★ | ★ | ★ | – | ★ | ★ | ★ | ★ | 7 |