Mohammad Hajizadeh1, Marie Charles2, Grace M Johnston3, Robin Urquhart4. 1. School of Health Administration, Faculty of Health, Dalhousie University, Sir Charles Tupper Medical Building, 5850 College Street, 2nd Floor, Halifax, NS, B3H 4R2, Canada. m.hajizadeh@dal.ca. 2. Faculty of Medicine, Dalhousie University, Halifax, Canada. 3. Cancer Care Program, Nova Scotia Health, School of Health Administration, Dalhousie University, Halifax, Canada. 4. Department of Community Health and Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, Canada.
Abstract
PURPOSE: Colorectal cancer is the third most commonly diagnosed cancer in Canada. This study aimed to measure and examine trends in socioeconomic inequalities in the incidence of colorectal cancer in Canada. METHODS: This study is a time trend ecological study based on Canadian Census Division level data constructed from the Canadian Cancer Registry, Canadian Census of Population, and National Household Survey. We assessed trends in income and education inequalities in colorectal cancer incidence in Canada from 1992 to 2010. The age-standardized Concentration index ([Formula: see text]), which measures inequality across all socioeconomic groups, was used to quantify socioeconomic inequalities in colorectal cancer incidence in Canada. RESULTS: The average crude colorectal cancer incidence was found to be 61.52 per 100,000 population over the study period, with males having a higher incidence rate than females (males: 66.98; females: 56.25 per 100,000 population). The crude incidence increased over time and varied by province. The age-standardized C indicated a higher concentration of colorectal cancer incidence among lower income and less-educated neighborhoods in Canada. Income and education inequalities increased over time among males. CONCLUSION: The concentration of colorectal cancer incidence in low socioeconomic neighborhoods in Canada has implications for primary prevention and screening.
PURPOSE: Colorectal cancer is the third most commonly diagnosed cancer in Canada. This study aimed to measure and examine trends in socioeconomic inequalities in the incidence of colorectal cancer in Canada. METHODS: This study is a time trend ecological study based on Canadian Census Division level data constructed from the Canadian Cancer Registry, Canadian Census of Population, and National Household Survey. We assessed trends in income and education inequalities in colorectal cancer incidence in Canada from 1992 to 2010. The age-standardized Concentration index ([Formula: see text]), which measures inequality across all socioeconomic groups, was used to quantify socioeconomic inequalities in colorectal cancer incidence in Canada. RESULTS: The average crude colorectal cancer incidence was found to be 61.52 per 100,000 population over the study period, with males having a higher incidence rate than females (males: 66.98; females: 56.25 per 100,000 population). The crude incidence increased over time and varied by province. The age-standardized C indicated a higher concentration of colorectal cancer incidence among lower income and less-educated neighborhoods in Canada. Income and education inequalities increased over time among males. CONCLUSION: The concentration of colorectal cancer incidence in low socioeconomic neighborhoods in Canada has implications for primary prevention and screening.
Authors: D Major; H Bryant; M Delaney; S Fekete; L Gentile; M Harrison; V Mai; E Nicholson; Y Taylor Journal: Curr Oncol Date: 2013-10 Impact factor: 3.677
Authors: Darren R Brenner; Hannah K Weir; Alain A Demers; Larry F Ellison; Cheryl Louzado; Amanda Shaw; Donna Turner; Ryan R Woods; Leah M Smith Journal: CMAJ Date: 2020-03-02 Impact factor: 8.262