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Gastric Cancer

, Volume 11, Issue 1, pp 23–32 | Cite as

Citrus fruit intake and stomach cancer risk: a quantitative systematic review

  • Jong-Myon Bae
  • Eun Ja Lee
  • Gordon Guyatt
Original Article

Abstract

Background

The purpose of this systematic review was to investigate the association between dietary intake of citrus fruits and gastric cancer risk.

Methods

We searched electronic databases and the reference lists of publications on diet and stomach cancer studies until April 2007. All of the epidemiological studies that obtained individual data on dietary intake of citrus fruits and presented risk estimates of the association between intake of citrus fruits and risk of stomach cancer were identified and included in this review. Using general variance-based methods, study-specific odds ratio (OR)/ relative risk (RR) and associated confidence interval (CI)/ standard error (SE) for highest versus lowest intake of citrus fruits level were extracted from each article.

Results

Fourteen articles, including six hospital-based case-control studies, six community-based case-control studies, and two cohort studies, proved eligible. Overall summary OR using a fixed-effect model showed a 28% reduction in risk of stomach cancer associated with high intake of citrus fruits (summary OR = 0.72; 95% CI = 0.64–0.81; P value <0.0001); results were consistent across studies (I2 = 0, where I2 describes the percentage of total variation across studies because of heterogeneity rather than chance). Also, visual inspection of the results did not suggest a publication bias.

Conclusion

Pooled results from observational studies support a protective effect of high citrus fruit intake in the risk of stomach cancer.

Key words

Citrus fruits Stomach neoplasm Metaanalysis Cancer risk Prevention 

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Copyright information

© The International Gastric Cancer Association and The Japanese Gastric Cancer Association 2008

Authors and Affiliations

  • Jong-Myon Bae
    • 1
    • 2
  • Eun Ja Lee
    • 3
  • Gordon Guyatt
    • 2
  1. 1.Department of Preventive MedicineCheju National University College of MedicineJeju, JejudoKorea
  2. 2.CLARITY Research Group, Department of Clinical Epidemiology & Biostatistics, Health Sciences CentreMcMaster UniversityHamiltonCanada
  3. 3.Department of RadiologyMyongji Hospital, Kwandong University, College of MedicineKoyangKorea

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