title: Helicobacter pylori seropositivity is positively associated with colorectal neoplasms.
abstract: OBJECTIVE
  Helicobacter pylori is a well known precursor to gastric cancer and gastric mucosa-associated lymphoid tissue lymphoma. This study was to determine whether H. pylori was associated with colorectal neoplasms in Korean subjects undergoing routine checkup.
  
  
  METHODS
  A total of 10,082 subjects underwent routine checkups from January 2004 to April 2005. A H. pylori IgG test and stool occult blood test were included in the routine checkup program. Colonoscopy was performed if the stool occult blood test was positive or under subject request. Patients who underwent colonoscopy and had histologically confirmed cases of colorectal neoplasms were designanted as the subject group and those without as the control group.
  
  
  RESULTS
  Of the 10,082 subjects, 597 had full colonoscopy. The results identified 9 colorectal carcinomas and 118 adenomas. H. pylori seropositivity was identified in 6 (66%) subjects with colorectal carcinoma, 81 (68.6%) with colorectal adenoma and 248 (52.8%) controls. Subjects having colorectal neoplasms had a significantly higher H. pylori seropositivity rate compared with the controls (OR 1.94, 95% CI 1.28-2.95). This remained significant after adjusting for age, sex, body mass index, HbA1c and total cholesterol (OR 1.90, 95% CI 1.23-2.93). Patients with distal neoplasms also had a significantly higher H. pylori seroposivity rate (OR 1.88, 95% CI 1.17-3.01) which persisted after multivariate adjustment (OR 1.79, 95% CI 1.10-2.94).
  
  
  CONCLUSIONS
  Subjects with colorectal neoplasms present an increased H. pylori seroprevalence compared with controls.
authors.affiliation: Division of Gastroenterology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea.
authors.forename: Kwan Woo
authors.initials: KW
authors.lastname: Nam
authors.forename: Myong Ki
authors.initials: MK
authors.lastname: Baeg
authors.forename: Jung Hyun
authors.initials: JH
authors.lastname: Kwon
authors.forename: Soung Hoon
authors.initials: SH
authors.lastname: Cho
authors.forename: Soo Jin
authors.initials: SJ
authors.lastname: Na
authors.forename: Myung-Gyu
authors.initials: MG
authors.lastname: Choi
mesh_terms: D000236:Adenoma / Q000175:diagnosis* / Q000209:etiology; D000328:Adult; D000367:Age Factors; D000368:Aged; D015992:Body Mass Index; D002784:Cholesterol / Q000097:blood; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D016481:Helicobacter Infections / Q000150:complications / Q000175:diagnosis*; D016480:Helicobacter pylori / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D008297:Male; D008875:Middle Aged; D009780:Occult Blood; D016017:Odds Ratio; D012189:Retrospective Studies; D012307:Risk Factors; D012737:Sex Factors
chemical_list: D002784:Cholesterol; D006442:Glycated Hemoglobin; D007074:Immunoglobulin G