Brief Article
Copyright copy;2010 Baishideng Publishing Group Co.
World J Gastroenterol. Oct 21, 2010; 16(39): 4992-4997
Published online Oct 21, 2010. doi: 10.3748/wjg.v16.i39.4992
Table 2 Quality assessment: internal validity of the included randomized trials
Ref.Randomization allocationConcealment of allocationBlindingIntention-to-treat analysisWithdrawal and dropouts
COST 2007[16]YesNot clearNot clearYesClear report
Lacy 2008[15]YesAdequateNot clearYesClear report
COLOR 2009[14]YesNot clearNot clearYesClear report