Table 2 Study quality evaluation via the Newcastle-Ottawa Scale
Study | Adequate definition of cases | Representativeness of cases | Selection of controls | Definition of controls | Control for age and sex | Control for other confounders | Exposure ascertainment | Same methods for events ascertainment | Non-response rates | Total |
|---|---|---|---|---|---|---|---|---|---|---|
Fasano 2013 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Gravina 2015a | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Gravina 2015b | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Del Zompo 2016 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 8 |
Enko 2017 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Mujeeb 2019 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Radionova 2020a | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Radionova 2020b | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Kim 2022 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |
Zhu 2022 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 7 |