Table 2 Quality assessment and modified Jadad score of included 6 randomized controlled trials
Studies (years) | Random sequence generation | Allocation concealment | Blinding | Incomplete outcome data | Selective reporting | Other bias | Modified Jadad score |
|---|---|---|---|---|---|---|---|
Huang (2014) [16] | Low | Low | Low | Low | Low | Low | 8 |
Liu (2015) [19] | Unclear | Unclear | Unclear | Low | Low | Low | 4 |
Jain (2016) [17] | Low | Low | Low | Low | Low | Low | 7 |
Nielsen (2016) [22] | Low | Low | Low | Low | Low | Low | 8 |
Lee (2017) [23] | Low | Low | Unclear | Low | Low | Low | 6 |
Song (2017) [24] | Low | Low | Low | Low | Low | Low | 7 |