Table 2.
Bias Assessment of the Included Non-randomized Studies
| Study | Confounding bias | Selection bias | Classification bias | Bias due to deviation from interventions | Bias due to missing data | Bias in measurement of outcomes | Bias in selection of reported results | Results |
|---|---|---|---|---|---|---|---|---|
| Kim et al.26) (2018) | Low risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Low risk | Moderate risk |
| Kulachote et al.25) (2020) | Low risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Low risk | Moderate risk |
| Mochizuki et al.27) (2022) | Low risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Low risk | Moderate risk |
| Schuetze et al.28) (2021) | Low risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Low risk | Moderate risk |
| Yee et al.29) (2020) | Low risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Low risk | Moderate risk |