After adjusting for significant factors in the univariate analysis, older age (OR 1.33, 95% CI 1.04–2.87, p < 0.05), lower eGFR level (8.04, 3.02–22.6, p < 0.01), history of gastric ulcer (2.41, 1.08–5.01, p < 0.05), decreased use of a PPI (0.18, 0.11–0.31, p < 0.001) and the SLCO1B1*1b/*1b diplotype (2.64, 1.59–4.17, p < 0.05) were significantly associated with gastric mucosal erosion in multiple logistic regression analysis (Table 5). Here, SLCO1B1 is linked to gastric ulcer.