TABLE 3.
Quality assessment of included studies.
| Study (years) | A | B | C | D | E | F | G | H | I | J | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Bai YJ 2019 | ? | Y | ? | Y | N | Y | N | Y | ? | Y | 5 |
| Cui YC 2017 | ? | Y | ? | ? | N | Y | N | Y | ? | N | 3 |
| Gu M 2016 | ? | Y | ? | Y | N | Y | N | N | ? | Y | 4 |
| Jiang LJ 2021 (1) | ? | ? | ? | ? | N | Y | N | ? | ? | Y | 2 |
| Jiang LJ 2021 (2) | ? | ? | ? | ? | N | Y | N | ? | ? | Y | 2 |
| Jiang LJ 2021 (3) | ? | ? | ? | ? | N | Y | N | ? | ? | Y | 2 |
| Li CY 2020 | ? | Y | ? | ? | N | Y | N | ? | ? | Y | 3 |
| Li GH 2016 | ? | Y | ? | Y | N | Y | N | N | ? | Y | 4 |
| Li L 2018 | ? | Y | ? | Y | N | Y | N | Y | ? | Y | 5 |
| Li Q 2016 | ? | Y | ? | Y | N | Y | N | Y | ? | Y | 5 |
| Ling YN 2016 | ? | Y | ? | ? | N | Y | N | ? | ? | Y | 3 |
| Wang D 2017 | ? | Y | ? | Y | N | Y | N | Y | ? | Y | 5 |
| Wang DS 2020 | ? | Y | ? | ? | N | Y | N | ? | ? | Y | 3 |
| Wang ZK 2020 | ? | Y | ? | Y | N | Y | N | N | ? | Y | 4 |
| Wu B 2018 (1) | ? | Y | ? | ? | N | Y | N | ? | ? | Y | 3 |
| Wu B 2018 (2) | ? | Y | ? | Y | N | Y | N | ? | ? | Y | 4 |
| Lin Q 2018 | ? | Y | ? | Y | N | Y | N | Y | ? | Y | 5 |
| Liu XY 2016 | ? | Y | ? | Y | N | Y | N | Y | ? | Y | 5 |
| Yang L 2016 | ? | ? | ? | ? | N | Y | N | ? | ? | Y | 2 |
| Kazemirad H 2020 | ? | Y | ? | ? | N | Y | N | Y | ? | Y | 4 |
Y: yes (low risk of bias); N: No (high risk of bias); ? unclear bias.(A) sequence generation; (B) baseline characteristics; (C) allocation concealment; (D) random housing; (E) blinding investigators; (F) random outcome assessment; (G) blinding outcome assessor; (H) incomplete outcome data; (I) selective outcome reporting; (J) other sources of bias.