24 May 2021 : Meta-Analysis
Relationship of Programmed Death-1 (PD-1) and Programmed Death Ligand-1 (PD-L1) Polymorphisms with Overall Cancer Susceptibility: An Updated Meta-Analysis of 28 Studies with 60 612 Subjects
Wenjing Zhang12BCDEF, Yuxuan Song34ABEF, Xiangcheng Zhang1ACEG*DOI: 10.12659/MSM.932146
Med Sci Monit 2021; 27:e932146
Table 2 Quality assessment based on the Newcastle-Ottawa Scale of trials included in this meta-analysis.
| Items | Selection | Comparability | Exposure | Total scores | |||||
|---|---|---|---|---|---|---|---|---|---|
| Adequacy of case definition | Representativeness of the cases | Selection of controls | Definition of controls | Ascertainment of exposure | Same method of ascertainment | Non-response rate | |||
| Tao | ✰ | ✰ | NA | NA | NA | ✰ | ✰ | NA | 4 |
| Cheng, 2017 | NA | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 7 |
| Zhou, 2017 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Li, 2016 | ✰ | ✰ | NA | NA | ✰ | ✰ | ✰ | ✰ | 6 |
| Mojtahedi, 2012 | ✰ | NA | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 6 |
| Qiu, 2014 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Tang, 2015 | ✰ | ✰ | NA | NA | ✰ ✰ | ✰ | ✰ | ✰ | 7 |
| Haghshenas, 2011 | ✰ | NA | NA | ✰ | ✰ ✰ | ✰ | ✰ | NA | 6 |
| Li, 2016 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Kasamats, 2019 | ✰ | ✰ | NA | NA | NA | ✰ | ✰ | ✰ | 5 |
| Boas, 2018 | NA | ✰ | NA | NA | ✰ | ✰ | ✰ | ✰ | 5 |
| Wei, 2017 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Fathi, 2018 | ✰ | NA | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 6 |
| Xie, 2018 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Emma, 2010 | NA | ✰ | NA | ✰ | ✰ | ✰ | NA | 4 | |
| Bay, 2012 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Zhou, 2016 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 7 |
| Li, 2016 | ✰ | ✰ | NA | ✰ | ✰ ✰ | ✰ | ✰ | ✰ | 8 |
| Haghshenas, 2016 | NA | NA | NA | ✰ | NA | ✰ | ✰ | NA | 3 |
| Namavar, 2017 | ✰ | NA | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 6 |
| Ge, 2015 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | NA | 6 |
| Wang, 2013 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 7 |
| Chen, 2014 | NA | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 6 |
| Tan, 2017 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 7 |
| Zang, 2020 | NA | NA | NA | NA | NA | ✰ | ✰ | ✰ | 5 |
| Ren, 2016 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | NA | 6 |
| Ma, 2015 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 7 |
| Hua, 2011 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 7 |
| Tang, 2017 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | NA | 6 |
| Fathi, 2019 | ✰ | ✰ | NA | ✰ | ✰ | ✰ | ✰ | ✰ | 7 |
| Zhao, 2018 | ✰ | NA | NA | ✰ | ✰ | ✰ | ✰ | NA | 5 |