Carbonated Soft Drinks and Risk of Esophageal Adenocarcinoma: A Population-Based Case–Control Study

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The increased intake of carbonated soft drinks parallels the incidence of esophageal adenocarcinoma. To determine whether an association exists between carbonated drink intake and esophageal and cardia adenocarcinoma, we analyzed data from a Swedish nationwide, population-based, case–control study. During data collection in 1995–1997, 189 patients with esophageal adenocarcinoma (88% of all eligible), 262 patients with cardia adenocarcinoma (84%), and 820 control subjects (73%) were interviewed in person. All cancers were histologically classified. We calculated odds ratios with 95% confidence intervals using conditional logistic regression and multivariable analyses. Frequency of intake of carbonated soft drinks was not associated with risk of esophageal adenocarcinoma; high consumers (intake more than six times weekly) were at a statistically nonsignificantly decreased risk compared with never users (odds ratio=0.89, 95% confidence interval=0.49 to 1.64). Consumption of carbonated low-alcohol beer and combined intake of carbonated drinks were not associated with risk of esophageal adenocarcinoma. No association between intake of carbonated soft drinks or low-alcohol beer and risk of cardia adenocarcinoma was observed.

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