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A population-based analysis of esophageal and gastric cardia adenocarcinomas in Ontario, Canada: incidence, risk factors, and regional variation

Published: March 16, 2011
Category: Papers
Authors: Green J, Ko YJ, Liu Y, Paszat L, Rabeneck L, Sutradhar R, Tinmouth J, Urbach D
Country: Canada
Language: null
Type: Population Health
Setting: Hospital

J Gastrointest Surg 15:782-790.

Sunnybrook Health Sciences Centre, Toronto, ON, Canada

INTRODUCTION: In Western countries, the incidence of esophageal adenocarcinoma (EA) and gastric cardia adenocarcinoma (GCA) is increasing. This population-based study describes the incidence of, associated patient risk factors for, and regional variation in EA/GCA in Ontario, Canada.

METHODS: All adults with a new diagnosis of EA or GCA between 1972 and 2005 in Ontario were identified. Adjusted annual incidence rates were calculated, and multivariate models were used to identify patient risk factors. Maps were created to explore regional variation.

RESULTS: Over the study period, 8,245 persons were diagnosed with EA/CGA; incidence increased from 1.01 to 3.9 per 100,000. Age (>65 vs. 50 years; rate ratio (RR), 3.4; 95% confidence interval (CI), 2.8-4.1) and comorbidity (highest vs. lowest, RR, 3.5; 95% CI, 2.-4.2) were most strongly associated with the development of EA/GCA. We found considerable regional variation in the rates of EA/GCA (North West vs. Central region, RR, 6.5; 95% CI, 4.4-9.6). Maps suggested ethnicity may explain some regional variation, and that the current allocation of designated surgical treatment centers for EA/CGA may be suboptimal.

CONCLUSIONS: The incidence of EA/GCA is rising dramatically in Ontario. Further investigation of observed regional variation is warranted, particularly for the allocation of cancer health resources.

PMID: 21409602

High-Impact Chronic Conditions,Resource Allocation,High Risk,Canada,Adult,Aged,Gender,Incidence,Middle Aged,Ontario/epidemiology,Retrospective Studies,Risk Factors

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