Table 5 Study quality of case–control studies based on the NWewcastle-Ottawa scale
NOS | Selection | Comparability | Outcome | Overall score | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
ID | Year | study_design | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
Chen | 2022 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 8 |
El-Nahas | 2019 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Golomb | 2022 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Humphreys | 2018 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | 6 | ||
Lee | 2016 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Liao | 2023 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | 6 | ||
Mulåescu | 2014 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | 6 | ||
Schatloff | 2010 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |
Yildirim | 2022 | cohort study | ★ | ★ | ★ | ★ | ★ | ★ | ★ | 7 | |