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Gastroenterology. 2012 Apr;142(4):744-53. doi: 10.1053/j.gastro.2011.12.049. Epub 2012 Jan 11.

Cigarette smoking increases risk of Barrett's esophagus: an analysis of the Barrett's and Esophageal Adenocarcinoma Consortium.

Author information

  • 1Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland 20852-7234, USA. michael.cook@nih.gov

Abstract

BACKGROUND & AIMS:

Cigarette smoking has been implicated in the etiology of esophageal adenocarcinoma, but it is not clear if smoking is a risk factor for Barrett's esophagus. We investigated whether tobacco smoking and other factors increase risk for Barrett's esophagus.

METHODS:

We analyzed data from 5 case-control studies included in the international Barrett's and Esophageal Adenocarcinoma Consortium. We compared data from subjects with Barrett's esophagus (n = 1059) with those from subjects with gastroesophageal reflux disease (gastroesophageal reflux disease controls, n = 1332), and population-based controls (n = 1143), using multivariable logistic regression models to test associations with cigarette smoking. We also tested whether cigarette smoking has synergistic effects with other exposures, which might further increase risk for Barrett's esophagus.

RESULTS:

Subjects with Barrett's esophagus were significantly more likely to have ever smoked cigarettes than the population-based controls (odds ratio [OR] = 1.67; 95% confidence interval [CI]: 1.04-2.67) or gastroesophageal reflux disease controls (OR = 1.61; 95% CI: 1.33-1.96). Increasing pack-years of smoking increased the risk for Barrett's esophagus. There was evidence of a synergy between ever-smoking and heartburn or regurgitation; the attributable proportion of disease among individuals who ever smoked and had heartburn or regurgitation was estimated to be 0.39 (95% CI: 0.25-0.52).

CONCLUSIONS:

Cigarette smoking is a risk factor for Barrett's esophagus. The association was strengthened with increased exposure to smoking until ∼20 pack-years, when it began to plateau. Smoking has synergistic effects with heartburn or regurgitation, indicating that there are various pathways by which tobacco smoking might contribute to development of Barrett's esophagus.

Copyright © 2012 AGA Institute. Published by Elsevier Inc. All rights reserved.

PMID:
22245667
[PubMed - indexed for MEDLINE]
PMCID:
PMC3321098
Free PMC Article
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