Table 2 Risk of bias in PSM studies (ROBINS-I)
Study | D1 | D2 | D3 | D4 | D5 | D6 | D7 | Overall |
|---|---|---|---|---|---|---|---|---|
Hong et al. [24] | Low | Moderate | Low | Low | Low | Low | Moderate | Moderate |
Li et al. [25] | Low | Low | Low | Low | Low | Low | Moderate | Moderate |
Li et al. [4] | Low | Moderate | Low | Low | Low | Low | Low | Moderate |
Roh et al. [30] | Low | Low | Low | Low | Low | Low | Moderate | Moderate |
Song et al. [27] | Low | Low | Low | Low | Low | Low | Moderate | Moderate |
Ye et al. [28] | Low | Low | Low | Low | Low | Low | Low | Low |
Isobe et al. [29] | Low | Moderate | Low | Low | Low | Low | Low | Moderate |