Table 2 Newcastle Ottawa scale to assess the quality of the included studies
Study | Selection | Comparability | Outcome | NOS score | |||||
|---|---|---|---|---|---|---|---|---|---|
Representative of the cases | Selection of controls | Ascertainment of exposure | Outcome of interest | Comparability of the design or analysis | Assessment of outcome | Sufficient follow-up | Adequacy of follow-up | ||
Sato 2021 [31] | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 | 7 |
Sato 2020 [30] | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 | 7 |
Santana 2019 [29] | 0 | 0 | 1 | 1 | 2 | 1 | 0 | 0 | 5 |
Xia 2021 [32] | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 | 7 |
Chang 2022 [28] | 0 | 0 | 1 | 1 | 2 | 1 | 0 | 0 | 5 |