Proton pump inhibitor use increases hepatic encephalopathy risk: A systematic review and meta-analysis

Table 2 Quality assessment of included studies using the Newcastle-Ottawa scale

Author (year)	Subject selection	Group comparability	Exposure measurement	Total score
Dam et al[20], 2016	2	2	3	7
Lin et al[21], 2014	3	2	3	8
Nardelli et al[12], 2018	3	2	3	8
Sturm et al[13], 2018	4	2	3	9
Tergast et al[14], 2018	2	2	3	7
Tsai et al[22], 2016	3	2	3	8
Zhu et al[15], 2018	3	2	3	8