Brief Article
Copyright ©2011 Baishideng Publishing Group Co.
World J Gastroenterol. Jul 14, 2011; 17(26): 3158-3164
Published online Jul 14, 2011. doi: 10.3748/wjg.v17.i26.3158
Table 5 Assessment the methodological quality of included studies
Author (yr)Sample size calculationGeneration of allocation sequenceAllocation concealmentDeviations, withdrawals and dropoutsEfficacy of randomizationBlindingDefinition of outcome parameters
Figueras et al (2005)YesNo descriptionSealed envelopeYesYesNo descriptionYes
Wu et al (2002)No descriptionNo descriptionSealed envelopeNo descriptionYesNo descriptionYes
Yuan et al (2010)YesYesSealed envelopeYesYesSingle-blindedNo description
Liang et al (2009)No descriptionNo descriptionNo descriptionYesYesNo descriptionYes