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| Study | Randomization | Allocation concealment | Blinding | Withdraw | Score |
| Hannareeta 2016 14 | 2 | 2 | 1 | 1 | 6 |
| Arsalan 2017 15 | 2 | 2 | 1 | 1 | 6 |
| Chih 2017 16 | 0 | 2 | 0 | 1 | 3 |
| Takao 2012 18 | 2 | 2 | 1 | 1 | 6 |
| Seongryu 2019 19 | 2 | 2 | 1 | 1 | 6 |
| Daniel 2018 20 | 2 | 2 | 1 | 1 | 6 |
| Takao 2013 21 | 2 | 2 | 1 | 1 | 6 |
| Cay 2018 22 | 2 | 1 | 0 | 1 | 4 |
