Proton pump inhibitors in prevention of low-dose aspirin-associated upper gastrointestinal injuries

Table 2 Bias risk evaluation of the studies included in the meta-analysis

Ref.	Random sequence generation	Allocation blinding	Blinding of participants and personnel	Blinding of outcome assessment	Imcomplete outcome data	Selective reporting	Other bias
Lai et al[3]	Low risk	Unclear risk	Low risk	Low risk	Low risk	Low risk	Low risk
Yeomans et al[4]	Low risk	Unclear risk	Low risk	Low risk	Low risk	Low risk	Low risk
Bhatt et al[5]	Low risk	Unclear risk	Low risk	Low risk	Low risk	Low risk	high risk
Ren et al[6]	Unclear risk	Unclear risk	Unclear risk	Unclear risk	Low risk	Low risk	Low risk
Scheiman et al[8]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Sugano et al[9]	Low risk	Unclear risk	Low risk	Low risk	Low risk	Low risk	Low risk
Sanuki et al[7]	Unclear risk	Unclear risk	Low risk	Low risk	Low risk	Low risk	Low risk
Ng et al[12]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Ng et al[11]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Yano et al[10]	Low risk	Unclear risk	Unclear risk	Unclear risk	Low risk	Low risk	Low risk