Objective To analyze the association between dominant symptoms in different subtypes of functional dyspepsia(FD) and Helicobacter pylori(Hp) infection. Methods Patients matched with FD criterion of RomeⅢ were enrolled in the outpatient service. After investigating the dominant symptoms, they were divided into three subtypes: postprandial distress syndrome(PDS), epigastric pain syndrome(EPS) and overlapped(OL) group. Main symptoms and degree of their severity in patients were evaluated by 5-H gastric emptyin...