title: Prevalence of erosive esophagitis and Barrett's esophagus in the adult Chinese population.
abstract: OBJECTIVE
  The aim of this study was to determine the prevalence, characteristics, and risk factors of erosive esophagitis and Barrett's esophagus in an adult Chinese population without gastroesophageal reflux symptoms.
  
  
  METHODS
  Between March 2006 and February 2007, consecutive individuals aged between 18 and 75 years, who underwent routine upper endoscopy as part of their regular medical examination were recruited. Demographic and medical information were collected. Erosive esophagitis was defined endoscopically as visible breaks of the distal esophageal mucosa. Barrett's esophagus was diagnosed endoscopically and confirmed histologically. "Silent GERD" was defined when erosive esophagitis and/or Barrett's esophagus were present in an individual without reflux symptoms.
  
  
  RESULTS
  Among the 2580 individuals included, erosive esophagitis and Barrett's esophagus were found in 4.3 % (n = 110) and 1.0 % (n = 27), respectively. In individuals with erosive esophagitis and Barrett's esophagus, 33.6 % and 40.7 %, respectively, were asymptomatic. Thus, the prevalence of erosive esophagitis and Barrett's esophagus in individuals without GERS was 1.6 % and 0.5 %, respectively, giving an overall prevalence of silent GERD of 2.0 % (46 / 2270). Multivariate analysis identified that male sex (odds ratio [OR] = 2.87, 95 % confidence interval [CI] 1.24 - 6.66; P = 0.014), hiatus hernia (OR = 9.68, 95 %CI 5.00 - 17.95; P < 0.001), and alcohol consumption (OR = 3.17, 95 %CI 1.44 - 6.97; P = 0.004) were positively associated with erosive esophagitis, whereas Helicobacter Pylori infection (OR = 0.37, 95 %CI 0.14 - 0.98; P = 0.046) was negatively associated with erosive esophagitis. Alcohol consumption (OR = 5.32, 95 %CI 1.55 - 13.33; P = 0.008) was positively associated with Barrett's esophagus in asymptomatic individuals.
  
  
  CONCLUSIONS
  In this cohort of the adult Chinese population without reflux symptoms, the prevalence of erosive esophagitis and Barrett's esophagus is 1.6 % and 0.5 %, respectively, with an overall prevalence of silent GERD of 2.0 %. Male sex, hiatus hernia, and alcohol consumption are positively associated with erosive esophagitis, whereas a negative association exists for H. pylori infection. Alcohol consumption is positively associated with Barrett's esophagus.
authors.affiliation: Division of Gastroenterology and Hepatology, The First Affiliated Hospital of Sun-Yat Sen University, Guangzhou, China.
authors.forename: S
authors.initials: S
authors.lastname: Peng
authors.forename: Y
authors.initials: Y
authors.lastname: Cui
authors.forename: Y L
authors.initials: YL
authors.lastname: Xiao
authors.forename: L S
authors.initials: LS
authors.lastname: Xiong
authors.forename: P J
authors.initials: PJ
authors.lastname: Hu
authors.forename: C J
authors.initials: CJ
authors.lastname: Li
authors.forename: M H
authors.initials: MH
authors.lastname: Chen
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001471:Barrett Esophagus / Q000175:diagnosis / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D004941:Esophagitis / Q000175:diagnosis / Q000453:epidemiology* / Q000473:pathology; D004945:Esophagoscopy; D005260:Female; D005764:Gastroesophageal Reflux / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence