Geographic and Socioeconomic Disparity of Gastric Cancer Patients in Canada

Author:

Cattelan LeilaORCID,Ghazawi Feras M.ORCID,Le Michelle,Lagacé FrançoisORCID,Rahme Elham,Zubarev Andrei,Sasseville Denis,Litvinov Ivan V.ORCID,Waschke Kevin A.ORCID,Netchiporouk ElenaORCID

Abstract

Gastric cancer is the 5th most common malignancy worldwide, representing ~5–10% of all new cancer cases. Although its incidence is declining, it is estimated that 1 in 98 Canadians will develop gastric cancer in their lifetime. The epidemiology and distribution of gastric cancer throughout Canada, however, remains poorly understood. A retrospective analysis of demographic data across Canada between 1992 and 2010 was performed using 2 population-based cancer registries. The incidence of gastric cancer was examined at the levels of provinces, cities, and postal codes. In addition, 43,955 patients were diagnosed with gastric cancer in Canada between 1992 and 2010; 66% were male and the average age of diagnosis was 68.4 years. The age-adjusted incidence rate was 5.07 cases per 100,000 individuals per year. The incidence decreased over the study period by 30%. High incidence rates were identified in rural areas of Newfoundland and Labrador, New Brunswick, and Quebec. Our study found a significant association between gastric cancer incidence rates and lower socioeconomic status, as well as Hispanic ethnicity. This is the first study to provide a comprehensive analysis of the incidence of gastric carcinoma in Canada, identifying high-risk populations that may benefit from increased primary and secondary prevention.

Funder

Fonds de Recherche du Québec - Santé

Publisher

MDPI AG

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