Protective effect of proton pump inhibitors and potassium competitive acid blockers against post-gastric endoscopic submucosal dissection bleeding: a single-center, propensity score-matched analysis. Toya Yosuke,Endo Masaki,Sugai Kyohei,Yamada Shun,Oizumi Tomofumi,Morishita Toshifumi,Akasaka Risaburo,Yanai Shunichi,Nakamura Shotaro,Eizuka Makoto,Uesugi Noriyuki,Sugai Tamotsu,Matsumoto Takayuki Scandinavian journal of gastroenterology OBJECTIVES:Both potassium-competitive acid blockers (P-CABs) and proton pump inhibitors (PPIs) are known to be protective against bleeding after gastric endoscopic dissection (ESD) for early gastric cancers. The aim was to compare the effect of PPI and P-CAB treatment against bleeding after gastric ESD. MATERIALS AND METHODS:This was a single-center, retrospective analysis. Among 541 patients who underwent gastric ESD during the period from 2014 to 2019, we recruited subjects who were treated with PPIs (intravenous lansoprazole followed by oral esomeprazole) or a P-CAB before and after ESD. The incidence of post-ESD bleeding was compared between treatment groups. The risks associated with post-ESD bleeding were examined by univariate and multivariate analyses after propensity score-matching. RESULTS:The overall incidence of post-ESD bleeding was not significantly different between patients treated with PPIs ( = 362) and those treated with a P-CAB ( = 156) (3.0% vs 2.6%, respectively;  = .77). Even after propensity score matching ( = 153 in each group), the incidence was not significantly different between groups (2.6% vs 2.6%, respectively;  = 1.00). A multivariate analysis revealed that antithrombotic therapy (OR 4.85, 95% CI 1.14-20.57) was an independent factor associated with post-ESD bleeding. CONCLUSIONS:The incidence of post gastric ESD bleeding is not different between patients treated with PPI and patients treated with P-CAB. Antithrombotic therapy is an independent risk factor associated with post-ESD bleeding. 10.1080/00365521.2020.1862906