Tobacco smoking and gastric cancer risk: An evaluation based on a systematic review of epidemiologic evidence among the Japanese population

Yoshikazu Nishino, Manami Inoue, Ichiro Tsuji, Kenji Wakai, Chisato Nagata, Tetsuya Mizoue, Keitaro Tanaka, Shoichiro Tsugane

Research output: Contribution to journalReview articlepeer-review

94 Citations (Scopus)

Abstract

Background: We evaluated the association between tobacco smoking and gastric cancer risk among the Japanese population based on a systematic review of epidemiologic evidence. Methods: Original data were collectedby searches of MEDLINE using PubMed, complemented with manual searches. Evaluation of associations was based on the strength of evidence and the magnitude of association, together with biological plausibility, as evaluated previously by the International Agency for Research on Cancer. Results: Ten cohort studies and 16 case-control studies were identified. In men, most studies reported moderate or strong positive associations between smoking and gastric cancer. In women, the positive association was weaker than in men. Of eight studies (three cohort studies and five case-case control studies), two cohort and three case control studies reported a weakly to strongly increased risk of gastric cancer. The summary relative risk for current smokers was estimated to be 1.56 (95% confidence intervals 1.36-1.80), 1.79 (1.51-2.12), 1.22 (1.07-1.38) for the total population, men and women, respectively. Conclusion: We conclude that there is convincing evidence that tobacco smoking moderately increases the risk of gastric cancer among the Japanese population.

Original languageEnglish
Pages (from-to)800-807
Number of pages8
JournalJapanese journal of clinical oncology
Volume36
Issue number12
DOIs
Publication statusPublished - 2006 Dec

Keywords

  • Epidemiology
  • Japanese
  • Stomach cancer
  • Systematic review
  • Tobacco smoking

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging
  • Cancer Research

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