Table 2.
Quality of the included RCTs.
| Study | M1 | M2 | M3 | M4 | M5 | M score | J1 | J2 | J3 | J Score |
|---|---|---|---|---|---|---|---|---|---|---|
| Cai and Liu (19) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Chen and Yan (20) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Fan and Lv (21) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Guo et al. (22) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Huang et al. (23) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Liang and Liu (24) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Li and Ji (25) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Liu (26) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Meng (27) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Wang and Jiang (28) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Xia et al. (29) | 1 | 1 | 0 | 1 | 0 | 3 | 2 | 0 | 1 | 3 |
| Yang and Qu (30) | 1 | 1 | 0 | 1 | 0 | 3 | 2 | 0 | 1 | 3 |
| Yao and Wang (31) | 1 | 1 | 0 | 1 | 1 | 4 | 1 | 0 | 1 | 2 |
| Yuan and Ji (32) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Zhang (33) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Zhang (33) | 1 | 1 | 0 | 1 | 0 | 3 | 1 | 0 | 1 | 2 |
| Zhang et al. (35) | 1 | 1 | 0 | 1 | 0 | 3 | 2 | 0 | 1 | 3 |