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. 2004 Aug 31;91(5):929-34.
doi: 10.1038/sj.bjc.6602067.

Individual and joint impact of family history and Helicobacter pylori infection on the risk of stomach cancer: a nested case-control study

H Yatsuya  1 , H Toyoshima, A Tamakoshi, S Kikuchi, K Tamakoshi, T Kondo, T Mizoue, N Tokui, Y Hoshiyama, K Sakata, N Hayakawa, T Yoshimura; Japan Collaborative Cohort Study Group
Affiliations

Individual and joint impact of family history and Helicobacter pylori infection on the risk of stomach cancer: a nested case-control study

H Yatsuya et al. Br J Cancer. .

Abstract

We used 202 cases of stomach cancer and 394 controls nested within the Japan Collaborative Cohort Study For Evaluation of Cancer Risk (JACC study) to investigate whether family history has an independent effect on the risk of stomach cancer after controlling for the Helicobacter pylori infection. A positive history of stomach cancer in one or more first-degree relatives was associated with an increased risk of the disease in women, but not in men after controlling for H. pylori infection and other confounding variables. Women with both a family history and H. pylori infection were associated with more than five-fold increased risk of the disease (OR 5.10, 95% CI 1.58-16.5) compared to those without these factors. These results suggest the existence of inherited susceptibility to the disease in women, and that measurements of H. pylori infection together with the family history allow meaningful evaluation of risk beyond that provided by either factor alone.

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