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  • Proton pump inhibitors are ...
    Lam, Shiu Kum; Lau, George Ka Kit

    European journal of gastroenterology & hepatology, 07/2024, Volume: 36, Issue: 7
    Journal Article

    Sporadic fundic gland polyps (FGPs) progress, albeit rarely, to dysplasia and cancer. Two meta-analyses, including 8 and 11 studies, concluded that proton pump inhibitors (PPIs) were associated with FGPs. Intervention is considered unnecessary when FGPs have a background of PPIs use. Both meta-analyses, however, disregarded known confounders: age, sex, endoscopy indications, study design (prospective or retrospective), duration of PPI use, and H. pylori infection. Confounders are known to invalidate meta-analyses. We followed PRIXMA guidelines and searched the literature for studies on FGPs in PPI-users and PPI-nonusers. In the 22 studies searched, we compared FGPs in PPI-users ( n = 6534) and PPI-nonusers ( n = 41 115). Heterogeneity was significant (Cochran Q = 277.8, P < 0.0001; I 2 = 92.8%), annulling meta-analysis performed by blanket tallying. To offset the above confounders, we matched PPI-users and PPI-nonusers by (a) age and sex ( n = 4300 and 29 307, respectively) and (b) their propensity scores derived from the confounders ( n = 2950 and 4729, respectively). After both matching, FGPs were not significantly different between PPI-users and PPI-nonusers odds ratio (OR) = 1.1, P = 0.3078; OR = 0.9, P = 0.3258, respectively. Furthermore, FGP frequency did not correlate with increasing duration of PPI use (Pearson and Spearman correlation coefficients = 0.1162, 0.0386, P < 0.6064, 0.8646, respectively); it was not significantly different between any of the duration periods of observation, namely, <10, 10–20, 20–40, >40 months, nor was it significantly different between PPI-users and PPI-nonusers within each duration period ( P > 0.05). We conclude that PPIs are not associated with FGPs, implying that a background history of PPI use is not a justification for nonintervention in the management of FGPs.