“…When BE was defined as intestinal metaplasia (IM) in 26 studies, we found an increased negative correlation between Hp prevalence and BE (OR = 0.64; 95% CI, 0.51–0.80; P = 0.0001; I 2 = 90%) [ 11 , 12 , 13 , 36 , 38 , 40 , 42 – 45 , 50 , 52 – 58 , 60 – 67 ]. However, the negative correlation disappeared (OR = 0.76; 95% CI, 0.51–1.14; P = 0.18; I 2 = 92%) in the other subgroups, which diagnosed BE with columnar metaplasia (CM), endoscopic presentation, no clear definition, and gastric epithelium [ 35 , 37 , 39 , 41 , 46 – 49 , 51 , 59 ]. In addition, we divided the studies according to whether Hp could be confirmed as a present infection, into the present infected subgroup ( Hp positive with rapid urease test, urea breath test, histology, or culture), infection history subgroup ( Hp positive with serological detection, treatment history, or infection history), and not clear subgroup.…”