Brief Article
Copyright ©2014 Baishideng Publishing Group Co.
World J Gastroenterol. Jan 28, 2014; 20(4): 1061-1066
Published online Jan 28, 2014. doi: 10.3748/wjg.v20.i4.1061
Figure 1
Figure 1 Flow of the study. A total of 1197 patients were investigated in the study period, and 573 patients in Group A [without proton pump inhibitors (PPI) pretreatment] and 517 in Group B (with PPI pretreatment) were included in the analysis. Patients in Group B were reclassified into three groups based on the duration of PPI pretreatment: Group B-1 (3-14 d), Group B-2 (15-55 d) and Group B-3 (≥ 56 d). H2RA: H2 receptor antagonist.