The incidence of breast cancer in Canada 1971-2015: trends in screening-eligible and young-onset age groups.

ABSTRACT:

Objectives

Breast cancer incidence has fluctuated considerably in Canada, with recent reductions in rates among screening-eligible women. However, incidence of early-onset and pre-menopausal breast cancer is understudied. We examined age-specific trends in breast cancer incidence between 1971 and 2015, as well as possible trends by birth cohort.

Methods

Incidence data were collected from the National Cancer Incidence Reporting System and the Canadian Cancer Registry, and annual percent changes were estimated using the Joinpoint Regression Program. Five-year birth cohort models were fit using the National Cancer Institute's web tool.

Results

Breast cancer incidence among women under age 40 has increased since 2000, while incidence under 50 has remained stable. Rates of

SUBMITTER: Heer E 

PROVIDER: S-EPMC7501384 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature