title: [Prevalence of Barrett's esophagus in non-selected patients submitted to esophagogastroduodenoscopy and associated risk factors].
abstract: OBJECTIVE
  To establish the prevalence of the Barrett esophagus (BE) in non-selected patients who underwent upper gastrointestinal endoscopy (UGE) and identified risk factors associated.
  
  
  METHODS
  Case-control study on patients who underwent UGE between 2001-2003. Demographic data was gathered as well as the presence of esophagitis, H. pylori, hiatal hernia presence and length, nighttime symptoms, smoking, and alcohol consumption.
  
  
  RESULTS
  The global frequency of EB was 0.26%. Average age in patients with EB was 57.3 +/- 17 years old against 49 +/- 15 years old on the control group (p = 0.16). 69% of the patients with EB were men compared to 56% on the control group (p = 0.41). No difference regarding the presence of hiatal hernia was found between EB (79.6%) and patients without EB (72.5%) (p = 0.75). However, patients with EB presented a longer hiatal hernia (p < 0.05). There was no difference regarding the presence of esophagitis (p = 0.32), H. pylori (p = 0.61), smoking (p = 0.39), alcohol consumption (p = 0.34), nocturnal symptoms (p = 0.53) or extra-esophageal manifestations (p = 0.31). A significant difference existed regarding the presence of heartburn and the length of symptoms: patients with EB stated a history longer than 5 years in comparison with the control group (p < 0.005 and < 0.01 respectively).
  
  
  CONCLUSIONS
  The frequency of EB was 0.26% in Mexican non-selected population; the extents of hiatal hernia and history heartburn as well as a longer duration of symptoms were significantly associated to EB.
authors.affiliation: Unidad de Endoscopia, Hospital Juárez de México, Secretaría de Salud, México. gomez_nico@hotmail.com
authors.forename: Nicolás Gómez
authors.initials: NG
authors.lastname: Peña Alfaro
authors.forename: Martín Antonio
authors.initials: MA
authors.lastname: Manrique
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Chávez García
authors.forename: Ernesto
authors.initials: E
authors.lastname: Pérez Valle
authors.forename: Laura
authors.initials: L
authors.lastname: Ladrón de Guevara
authors.forename: Javier
authors.initials: J
authors.lastname: López Gutierrez
mesh_terms: D000328:Adult; D000368:Aged; D001471:Barrett Esophagus / Q000453:epidemiology* / Q000473:pathology; D016022:Case-Control Studies; D016145:Endoscopy, Digestive System; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors