title: Downward trend in the prevalence of Helicobacter pylori infections and corresponding frequent upper gastrointestinal diseases profile changes in Southeastern China between 2003 and 2012.
abstract: This present study aims to determine trends in the prevalence of H. pylori infections in Southeastern China between 2003 and 2012, and investigate corresponding changes in the prevalence of upper gastrointestinal diseases. This retrospective study screened 196,442 patients with a mean age of 47.49 ± 14.47 years (age range 5-100 years) in Southeastern China, and a total of 134,812 cases of an endoscopy-referral patient population with digestive symptoms between 2003 and 2012 were enrolled. Based on esophago-gastro-duodenoscopy and pathology, patients diagnosed with chronic gastritis, peptic ulcer, gastric cancer or reflux esophagitis were included in this study. Basic demographic and clinical characteristics such as H. pylori infection status and endoscopic findings were collected and analyzed. Among the 134,812 subjects, mean prevalence of H. pylori infection was 31.97 %; which demonstrated a linear downward trend from 42.40 to 23.82 % (P < 0.001) at an annual rate of 2 % from 2003 to 2012. Similarly, the prevalence of duodenal and gastric ulcer rapidly decreased from 12.65 to 6.57 % and from 7.51 to 3.78 %, respectively; while the prevalence of gastric cancer (from 3.76 to 2.34 %) did not significantly change in the same time period. In contrast, the prevalence of reflux esophagitis increased from 6.19 to 12.80 %. The progressively decreasing prevalence of H. pylori infections from 2003 to 2012 in Southeastern China appears to be linked with the decline of related upper gastrointestinal diseases and increase of some gastrointestinal motility diseases.
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Road, Nanjing, 210029 China.
authors.forename: Jian-Xia
authors.initials: JX
authors.lastname: Jiang
authors.affiliation: Department of Gastroenterology, Sir Run Run Hospital Nanjing Medical University, No. 109, Longmian Road, Nanjing, 211199 China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Department of Gastroenterology, The Second People's Hospital of Wuhu, Wuhu, China.
authors.forename: Xin-Yi
authors.initials: XY
authors.lastname: Mao
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Road, Nanjing, 210029 China.
authors.forename: Hai-Han
authors.initials: HH
authors.lastname: Zhang
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Road, Nanjing, 210029 China.
authors.forename: Guo-Xin
authors.initials: GX
authors.lastname: Zhang
authors.affiliation: Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, No. 300, Guangzhou Road, Nanjing, 210029 China.|Department of Gastroenterology, Sir Run Run Hospital Nanjing Medical University, No. 109, Longmian Road, Nanjing, 211199 China.
authors.forename: Shun-Fu
authors.initials: SF
authors.lastname: Xu
keywords: Epidemiology; Gastrointestinal diseases; Helicobacter pylori infection