ArticleThe oncologist2025
Breast cancer incidence and mortality, by age, stage and molecular subtypes, by race/ethnicity in Canada.
Article in The oncologist, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 14 papers, 1 of them a synthesis that pooled it.
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Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Global breast cancer incidence, mortality, and survival among indigenous women: A systematic review and meta-analysis.Breast (Edinburgh, Scotland) · 2026Pooled it
- In reply: frequency distribution of age at breast cancer diagnosis provides complementary clinical insight.The oncologist · 2026Article
- Differences in age at diagnosis of breast cancer largely attributable to different age structures.The oncologist · 2026Article
- Breast Cancer Molecular Subtypes and Receptor-Related Risk Factor Associations: A Cross-Sectional Study.Health science reports · 2026Article
- Guidance for Canadian Breast Cancer Practice: National Consensus Recommendations for the Systemic Treatment of Patients with Triple Negative Breast Cancer in Both the Early and Metastatic Setting 2025.Current oncology (Toronto, Ont.) · 2026Article
- Subsequent primary neoplasm risk among survivors of cancer in adolescence and young adulthood: a population-based study from Alberta, Canada.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2026Article
- Disparities in breast cancer incidence and survival by age, race, and molecular subtype in US women.NPJ breast cancer · 2026Article
- Breast Cancer Characteristics and Outcomes in Canadian Black Women by Ancestry.Current oncology (Toronto, Ont.) · 2025Article
- Article
- Outcomes in Symptomatic and Screen-detected Breast Cancer: Age, Tumor Biology, and Study Design Matter.Radiology. Imaging cancer · 2025Article
- The Association of Sleep Trouble and Physical Inactivity with Breast Cancer Risk in Nova Scotia: Evidence from the Atlantic PATH Cohort.International journal of environmental research and public health · 2025Article
- When "One Size Fits All" Fits None: A Commentary on the Impacts of the"Draft Canadian Breast Cancer Screening Guidelines" on Racialized Populations in Canada.Current oncology (Toronto, Ont.) · 2025Review
- The Breast to Bone (B2B) Cohort Study to Prevent, Detect and Improve Treatment of Metastatic Disease: Baseline Assessment, Description and Progress.International journal of environmental research and public health · 2025Article
- Clinicopathological and immunohistochemical profile of breast lesions diagnosed by core needle biopsy: a retrospective study from Sf. Ioan Hospital, Bucharest, Romania.Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologieArticle
Corrections and comments
- Erratum issued
Authors and funding
4 authors.
Funding
Abstract
backgroundBreast cancer (BC) characteristics and outcomes in Canada related to race/ethnicity are not currently documented.
methodsAge-specific and age-standardized BC incidence and mortality rates, age distribution of cases, proportions of stage, and molecular subtypes were calculated for women aged 20+, by race/ethnicity, using 2006 and 2011 Canadian Census Health and Environment Cohort databases of linked census, cancer, and death data.
resultsIn 47 105 BC cases, age-specific incidence rates were higher in Filipina (rate ratio (RR) = 1.27, 95%CI, 1.11-1.46) and multiethnicity (RR = 1.57, 95% CI, 1.18-2.08) compared to White women aged 40-49; and Filipina (RR = 1.16, 95% CI, 1.02-1.31) and Arab (RR = 1.3, 95% CI, 1.02-1.65) women aged 50-59. Median age at diagnosis was 63 among White women and 52-60 among other race/ethnicity groups, with 22.4%-41.1% of cases (P < .001) diagnosed before age 50 compared to 16.6% among White women. BC was diagnosed at stage I less frequently among Filipina (38.6%), Black (39.2%), South Asian (40.6%), and First Nations (40.7%) compared to White (46.5%) and Chinese (49.6%) (P < .05) women. Black women had higher proportions of BC diagnoses at stages III and IV combined (26.3%) than White women (17.0%, P = .001). The proportion of triple-negative BC among Black women (20.5%) was higher than among White (9.5%, P < .001). Compared to White, age-specific BC mortality rates were higher among Black women aged 40-49 (RR = 1.4, 1.06-1.85) as well as First Nations (RR = 1.21, 1.01-1.45) and Métis (RR = 1.48, 1.15-1.91) women aged 60-69.
interpretationCompared to White women, other Canadian women had an earlier peak age of BC diagnosis and higher proportions of cases diagnosed under age 50. Although many race/ethnicity groups had lower BC incidence and mortality than White, the higher age-specific BC mortality among Black 40-49 and First Nations and Métis women 60-69 merits further investigation.
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