Table 2.
Results of quality assessment using the Newcastle-Ottawa Scale for case-control studies.
| Author and Year | Selection (0–4 points) | Comparability Control for Important Factor (0–2 points) | Outcome (0–3 points) | Scores (9 Points) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Representativeness of the Exposed Cohort | Selection of the Nonexposed Cohort | Ascertainment of Exposure | Demonstration that Outcome of Interest was not Present at Start of Study | Assessment of Outcome | was Follow-Up Long Enough for Outcomes to Occur | Adequacy of Follow-Up of Cohorts | |||
| Bambury 2013 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
| Sheng Han 2015 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 6 |
| Peng-Fei Wang 2017 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Marta Lopes 2018 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 5 |
| Weiji Weng 2018 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 5 |
| Peng-Fei Wang 2018 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 6 |
| ÖZLEM YERSAL 2018 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 5 |
| SybrenL.N. Maas 2019 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
| Yajuan Lv 2019 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
| Yunfei Hao 2019 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 6 |
| Agam Brenner 2019 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Ozlem MERMUT 2020 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 |
| Alessandra Marini 2020 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 5 |
| Mehmet Besiroglu 2021 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 6 |
| Anne Clavreul 2021 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
| Vildan Kaya 2017 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 5 |
| Zhen-Yu Zhang 2019 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 7 |
| Xing-Wang Zhou 2016 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
| Qian He 2021 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 7 |