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Cancer Epidemiology, Biomarkers & Prevention
Cancer Epidemiology, Biomarkers & Prevention
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Body Mass Index and Adenocarcinomas of the Esophagus or Gastric Cardia: A Systematic Review and Meta-analysis

Ai Kubo and Douglas A. Corley
Ai Kubo
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Douglas A. Corley
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DOI: 10.1158/1055-9965.EPI-05-0860 Published May 2006
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Abstract

Background: The incidence of esophageal adenocarcinoma has increased markedly in recent decades in many countries. Obesity is a potential risk factor, although the results of individual studies differ. We did a systematic review and statistical synthesis of studies that evaluated the association between body mass index (BMI) and the risk of esophageal adenocarcinoma or the adjacent gastric cardia adenocarcinoma.

Methods: We identified potential studies using Medline, the Web of Science database, a manual review of the literature and expert bibliographies. Studies were included if they reported (a) a measure of body mass; (b) the occurrence of esophageal or cardia adenocarcinoma diagnosis; and (c) a relative risk or odds ratio (OR) with confidence intervals (CI) or provided sufficient data to permit their calculation.

Results: We identified 14 studies (2 cohort, 12 case-control; 2,488 esophageal and 2,509 cardia adenocarcinomas). A high BMI (>25) was associated with an increased risk of esophageal adenocarcinoma (males, OR, 2.2; 95% CI, 1.7-2.7; females, OR, 2.0; 95% CI, 1.4-2.9). Higher levels of BMI were associated with increased risk (overweight males, OR, 1.8; 95% CI, 1.5-2.2; obese males, OR, 2.4; 95% CI, 1.9-3.2). The overall associations with cardia cancer were heterogeneous, although stratification by study location provided homogeneous results for populations from the United States or Europe. A high BMI was weakly associated with the risk of cardia adenocarcinoma (OR, 1.5; 95% CI, 1.3-1.8; Pheterogeneity = 0.38).

Conclusions: Pooled results from observational studies support a positive association between high BMI and the risk for esophageal and possibly for cardia adenocarcinoma. (Cancer Epidemiol Biomarkers Prev 2006;15(5):872–8)

Footnotes

  • Grant support: National Institute of Health grants K08DK002697 and ROI DK63616.

  • The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked advertisement in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.

    • Accepted March 13, 2006.
    • Received November 7, 2005.
    • Revision received March 6, 2006.
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Cancer Epidemiology Biomarkers & Prevention: 15 (5)
May 2006
Volume 15, Issue 5
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Body Mass Index and Adenocarcinomas of the Esophagus or Gastric Cardia: A Systematic Review and Meta-analysis
Ai Kubo and Douglas A. Corley
Cancer Epidemiol Biomarkers Prev May 1 2006 (15) (5) 872-878; DOI: 10.1158/1055-9965.EPI-05-0860

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Body Mass Index and Adenocarcinomas of the Esophagus or Gastric Cardia: A Systematic Review and Meta-analysis
Ai Kubo and Douglas A. Corley
Cancer Epidemiol Biomarkers Prev May 1 2006 (15) (5) 872-878; DOI: 10.1158/1055-9965.EPI-05-0860
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