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Meta-Analysis
. 2013 Mar;24(3):609-17.
doi: 10.1093/annonc/mds244. Epub 2012 Aug 16.

A meta-analysis of body mass index and esophageal and gastric cardia adenocarcinoma

F Turati  1 , I Tramacere, C La Vecchia, E Negri
Affiliations
Free article
Meta-Analysis

A meta-analysis of body mass index and esophageal and gastric cardia adenocarcinoma

F Turati et al. Ann Oncol. 2013 Mar.
Free article

Abstract

Background: The incidence rates of esophageal and gastric cardia adenocarcinoma (EGCA) have increased over recent years in several countries, and overweight/obesity has been suggested to play a major role in these trends. In fact, higher body mass index (BMI) has been positively associated with EGCA in several studies.

Material and methods: We conducted a meta-analysis of case-control and cohort studies on the BMI and EGCA updated to March 2011. We estimated overall relative risks (RRs) and 95% confidence intervals (CI) for BMI between 25 and 30 and BMI ≥ 30 kg/m(2), when compared with normo-weight subjects, using random-effects models.

Results: We identified 22 studies, including almost 8000 EGCA cases. The overall RR was 1.71 (95% CI 1.50-1.96) for BMI between 25 and 30, and was 2.34 (95% CI 1.95-2.81) for BMI ≥ 30 kg/m(2). The continuous RR for an increment of 5 kg/m(2) of BMI was 1.11 (95% CI 1.09-1.14). The association was stronger for esophageal adenocarcinoma (RR for BMI ≥ 30 kg/m(2) = 2.73, 95% CI 2.16-3.46) than for gastric cardia adenocarcinoma (RR for BMI ≥ 30 kg/m(2) = 1.93, 95% CI 1.52-2.45). No substantial differences emerged across strata of sex and geographic areas.

Conclusion: Overweight and obesity are strongly related to EGCA, particularly to espophageal adenocarcinoma.

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