XXXX incidence in Canada: A 13-year prospective study.

@entity5 @entity1 @entity3675 @entity2
BACKGROUND: The risk of @entity2 has been shown to be inversely related to socioeconomic status (SES). Because the Canadian Cancer Registry does not contain socioeconomic data, the 1991 Canadian Census Cohort was used to study @entity2 risk in the general Canadian population. DATA AND METHODS: This study examines incidence rates of @entity2 and histologic subtypes by educational attainment, income and @entity3675 in a broadly representative sample of Canadians aged 25 or older. Data for the 1991 Canadian Census Cohort were analyzed. The cohort comprised 2,734,835 individuals, among whom 215,700 new @entity5 cases were diagnosed from 1991 through 2003. Age-standardized incidence rates were calculated by age, sex, and SES using the direct method. Rate ratios, rate differences, and excess incidence were also calculated. RESULTS: An inverse risk between @entity2 incidence and educational attainment, income and @entity3675 emerged among @entity1 and @entity1 , and a stepped negative gradient in RRs was evident for all SES variables and age groups. If all cohort members had experienced the rate of those with a university degree, @entity2 incidence would have been 56% lower in @entity1 and 55% lower in @entity1 . If all cohort members had experienced the incidence rate of those in the highest income quintile, incidence would have been 33% lower in @entity1 and 25% lower in @entity1 . If all cohort members had experienced the rate of those in managerial occupations, incidence would have been 54% lower in @entity1 and 44% lower in @entity1 . INTERPRETATION: A negative gradient in @entity2 risk was evident for all SES variables studied.
