Table 2.
A quality assessment table for cohort studies.
| Studies | Selection |
Comparability |
Outcome |
Scores | |||||
|---|---|---|---|---|---|---|---|---|---|
| Representativeness of exposed cohort | Selection of non-exposed cohort | Ascertainment of exposure | Outcome of interest was not present at start of study | Comparability of cohorts on basis of design or analysis controlled for confounders | Assessment of outcome | Follow-up long enough for outcomes to occur | Adequacy of follow-up of cohorts | ||
| Diao, 2016 | 1 | 1 | 1 | 1 | 1 | 1 | / | / | 6 |
| Du & Song, 2019 | 1 | 1 | 1 | 1 | 1 | 1 | / | / | 6 |
| Qu, 2017 | 1 | 1 | 1 | 1 | 1 | 1 | / | / | 6 |
| Ren, 2020 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | / | 7 |
| Song, Li, & Lu, 2019 | 1 | 1 | 1 | 1 | 1 | 1 | / | / | 6 |
| Wang, 2017 | 1 | 1 | 1 | 1 | 1 | 1 | / | / | 6 |
| Wu, 2018 | 1 | 1 | 1 | 1 | 2 | 1 | / | / | 7 |
| Zhang, 2022 | 1 | 1 | 1 | 1 | 1 | 1 | / | / | 6 |
| Shao, 2013 | / | 1 | 1 | 1 | 2 | 1 | / | / | 6 |
| Shi & Xu, 2013 | / | 1 | 1 | 1 | 2 | 1 | / | / | 6 |
| Xu, 2018 | / | 1 | 1 | 1 | 1 | 1 | / | / | 5 |