| Study | 1. Randomization | 2. Deviations from intervention | 3. Missing outcome data | 4. Measurement of the outcome | 5. Selection of the reported results | Overall risk of bias |
| Zhang 2021a | Some concernsb | Low | Low | Low | Low | Some concerns |
| Zhang 2021a | Some concernsc | Low | Low | Low | Low | Some concerns |
| Bueno 2021 | Some concernsd | Low | Low | Low | Low | Some concerns |
| Fadlyana 2021 | Low | Some concernse | Low | Low | Low | Some concerns |
| Palacios 2020 | Low | Low | Low | Low | Low | Low |
| Tanriover 2021 | Low | Low | Low | Low | Low | Low |
| Wu 2021a | Low | Low | Low | Low | Some concernsf | Some concerns |
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