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Atrophic Gastritis, Helicobacter pylori , and Colorectal Cancer Risk: A Case‐Control Study
Author(s) -
MachidaMontani Ai,
Sasazuki Shizuka,
Inoue Manami,
Natsukawa Syusuke,
Shaura Kozo,
Koizumi Yoichi,
Kasuga Yoshio,
Hanaoka Tomoyuki,
Tsugane Shoichiro
Publication year - 2007
Publication title -
helicobacter
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.206
H-Index - 79
eISSN - 1523-5378
pISSN - 1083-4389
DOI - 10.1111/j.1523-5378.2007.00513.x
Subject(s) - atrophic gastritis , medicine , gastroenterology , helicobacter pylori , odds ratio , gastritis , colorectal cancer , cancer , risk factor , confidence interval
Abstract Background: Helicobacter pylori is a major risk factor for atrophic gastritis and gastric cancer. Various extragastric manifestations of H. pylori infection have also recently been suggested. However, the correlation between H. pylori and colorectal cancer (CRC) is controversial. The aim of this study was to examine the correlation between H. pylori , serum gastrin level, and atrophic gastritis with CRC. Materials and methods: Subjects were patients with CRC; controls were participants of a health check‐up program that was conducted between October 1998 and March 2002 at four hospitals in Nagano Prefecture. For 121 newly diagnosed CRC cases, two controls matched by age (within 3 years), gender, and residence were randomly selected from the program participants. We conducted questionnaires and obtained blood samples from the cases and their controls. Consequently, the CRC cancer pairs consisted of 113 cases and 226 controls. Results: Neither H. pylori infection nor gastrin level nor atrophic gastritis showed any association with a risk for CRC. However, serologically determined atrophic gastritis demonstrated significant elevation in odds ratios (ORs) for rectal cancer (OR = 3.15, 95% confidence interval; 1.19–8.35). Conclusions: Gastric conditions such as chronic H. pylori infection and atrophic gastritis are unlikely to increase the risk for CRC, although atrophic gastritis may increase the risk of rectal cancer.