Table 3: Quality evaluation of studies in the meta-analysis.

StudyRandomizationAllocation sequence concealmentSelective reportingIncomplete outcome dataOther biasITT
analysis

Dixon et al. [13]Computer generatedNot statedNot statedYesNot statedYes
Schauer et al. [14]Block randomizationNot statedNot statedYesNot statedNot stated
Mingrone et al. [15]Computer generatedNot statedNot statedYesNot statedYes