Meta-Analysis
Copyright ©The Author(s) 2019.
World J Gastroenterol. Oct 21, 2019; 25(39): 6025-6040
Published online Oct 21, 2019. doi: 10.3748/wjg.v25.i39.6025
Table 2 Results of quality assessment
Ref.Random sequence generationAllocation concealmentBlinding of participants and personnelBlinding of outcome assessmentIncomplete outcome dataSelective reportingOther bias
Zhan, 2013[15]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Bai, 2008[16]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Wang, 2006[17]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Li, 2014[18]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Kochar, 2001[19]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Guan, 2017[20]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Zhao, 2015[21]UnclearUnclearHigh risk of biasUnclearLow risk of biasUnclearUnclear
Chen, 2016[22]UnclearUnclearHigh risk of biasUnclearHigh risk of biasUnclearUnclear