Table 2 Quality assessment of included studies
Study ID | Selection | Control for important factor | Exposure | ||||||
|---|---|---|---|---|---|---|---|---|---|
Adequate definition of cases | Representativeness of cases | Selection of control subjects | Definition of control subjects | Exposure assessment | Same method of ascertainment for all subjects | Non-response rate | Total | ||
Assunção JH, 2017 | ★ | ☆ | ★ | ★ | ★★ | ★ | ★ | ★ | 8 |
Briški N, 2020 | ★ | ☆ | ☆ | ★ | ★☆ | ★ | ★ | ★ | 7 |
El Khoury L, 2016 | ★ | ☆ | ★ | ★ | ★★ | ★ | ★ | ★ | 8 |
Figueiredo EA, 2020 | ★ | ☆ | ☆ | ★ | ★★ | ★ | ★ | ★ | 7 |
Gibbon A, 2017 | ★ | ☆ | ★ | ★ | ★☆ | ★ | ★ | ★ | 7 |
Haug KBF, 2018 | ★ | ★ | ★ | ★ | ★☆ | ★ | ★ | ★ | 8 |
Lulinska-Kuklik E, 2019 | ★ | ★ | ★ | ★ | ★☆ | ★ | ★ | ★ | 8 |
Malila S, 2011 | ★ | ☆ | ☆ | ★ | ★★ | ★ | ★ | ★ | 7 |
Miao K, 2019 | ★ | ☆ | ★ | ★ | ★☆ | ★ | ★ | ★ | 7 |
Nie G, 2019 | ★ | ☆ | ★ | ★ | ★★ | ★ | ★ | ★ | 8 |
Posthumus M, 2012 | ★ | ☆ | ★ | ★ | ★☆ | ★ | ★ | ★ | 7 |
Raleigh SM, 2009 | ★ | ☆ | ★ | ★ | ★☆ | ★ | ★ | ★ | 7 |