Copyright ©2013 Baishideng Publishing Group Co.
World J Gastroenterol. Aug 21, 2013; 19(31): 5165-5173
Published online Aug 21, 2013. doi: 10.3748/wjg.v19.i31.5165
Table 3 Risk of bias assessment
StudySequence generationAllocation concealmentBlinding of participants and personnelBlinding of outcome assessmentIncomplete outcome dataSelective reporting
Teoh et al[12]Low riskLow riskLow riskLow riskLow riskLow risk
Lee et al[13]Low riskUncertainHigh riskHigh riskUncertainLow risk
Perez et al[14]Low riskLow riskLow riskLow riskUncertainHigh risk
St Peter et al[15]Low riskLow riskLow riskHigh riskLow riskLow risk
Sozutek et al[16]Low riskUncertainHigh riskHigh riskUncertainHigh risk
Frutos et al[17]Low riskUncertainHigh riskHigh riskLow riskHigh risk