Table 2 Newcastle–Ottawa score of eligible studies
Study | Â | Selection | Â | Â | Comparability | Â | Exposure | Â | Score |
|---|---|---|---|---|---|---|---|---|---|
Definition | Representativeness | Selectiona | Definitiona | Minimum:2 | Ascertainment | Same method | Non-Response rate | ||
Bas 2015 [3] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Fan 2015 [16] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Luo 2015 [17] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Wang 2017 [18] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |
Zhang 2017 [19] | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
Luo 2018 [20] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Cai 2019 [21] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |
Ding 2019 [22] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Liu 2020 [23] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |
Pang 2021 [24] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
Wang 2021 [25] | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
Zeng 2022 [4] | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
Zhu 2022 [26] | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 6 |
Zong 2022 [27] | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 0 | 8 |
Liu 2023 [28] | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |