High-dose vs low-dose proton pump inhibitors for upper gastrointestinal bleeding: A meta-analysis

Table 1 Summary assessments of the risk of bias with studies

Author	Yr	Adequate sequence generation?	Allocation concealment?	Blinding?	Incomplete outcome data addressed?	Free of other bias?	Risk of bias
Andriulli et al[16]	2008	Yes	Yes	Yes	Yes	Yes	Low
Yüksel et al[17]	2008	Yes	Yes	Unclear	Yes	Yes	Low
Hung et al[2]	2007	Yes	Unclear	Unclear	No	No	High
Lin et al[19]	2006	Unclear	Yes	Unclear	Yes	Unclear	Unclear
Cheng et al[21]	2005	Unclear	Yes	Yes	Yes	Unclear	Low
Dokas et al[9]	2004	Unclear	Unclear	Unclear	Unclear	Unclear	Unclear
Chilovi et al[24]	2003	Unclear	Unclear	Unclear	Unclear	Unclear	High
Udd et al[8]	2001	Yes	Yes	Yes	Yes	Unclear	Low
Schonekas et al[7]	1999	Unclear	Unclear	Unclear	Unclear	Unclear	High