School of Health Administration, Faculty of Health, Dalhousie University, Sir Charles Tupper Medical Building, 5850 College Street, 2nd Floor, Halifax, NS, B3H 4R2, Canada.
Faculty of Medicine, Dalhousie University, Halifax, Canada.
Cancer Causes Control. 2022 Feb;33(2):193-204. doi: 10.1007/s10552-021-01518-x. Epub 2021 Nov 15.
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.
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.
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.
The concentration of colorectal cancer incidence in low socioeconomic neighborhoods in Canada has implications for primary prevention and screening.
结直肠癌是加拿大第三大常见癌症。本研究旨在衡量和研究加拿大结直肠癌发病率的社会经济不平等趋势。
本研究是一项基于加拿大普查分区水平数据的时间趋势生态研究，这些数据来自加拿大癌症登记处、加拿大人口普查和国家住户调查。我们评估了 1992 年至 2010 年期间加拿大结直肠癌发病率在收入和教育不平等方面的趋势。年龄标准化集中指数（[公式：见文本]）用于衡量加拿大结直肠癌发病率的社会经济不平等程度，该指数衡量所有社会经济群体的不平等程度。
研究期间，加拿大的结直肠癌粗发病率平均为每 100,000 人 61.52 例，男性的发病率高于女性（男性：66.98；女性：每 100,000 人 56.25 例）。粗发病率随时间增加，各省之间存在差异。年龄标准化 C 指数表明，加拿大收入较低和受教育程度较低的社区结直肠癌发病率较高。男性的收入和教育不平等程度随时间增加。
加拿大社会经济水平较低地区结直肠癌发病率的集中程度对初级预防和筛查具有重要意义。
