Table 3: Methodological quality of included RCTs.
Estimation of risk of bias | Prasad K, et al. 2014 [18] | Chen DC, et al. 2014 [46] | Bang OY, et al. 2005 [59] | Lee JS, et al. 2010 [60] |
Allocation concealment | Yes | No | Yes | Yes |
Blinding of outcomes | Yes | Yes | Yes | Yes |
Intention-to-treat analysis | Yes | Yes | No | No |
Losses to follow-up (incomplete outcome data addressed) | Yes | Yes | No | No |