ArticleCancer epidemiology2018
Breast cancer in Portugal: Temporal trends and age-specific incidence by geographic regions.
Article in Cancer epidemiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Ultrasound as a Method for Early Diagnosis of Breast Pathology.Journal of personalized medicine · 2023Article
- Incidence trends for twelve cancers in younger adults-a rapid review.British journal of cancer · 2022Review
- The Practice of Physical Activity After Breast Cancer Treatments: A Qualitative Study Among Portuguese Women.Frontiers in psychology · 2022Article
- Cross-cultural adaptation and psychometric evaluation of the Portuguese version of the family resilience questionnaire - short form (FaRE-SF-P) in women with breast cancer.Frontiers in psychology · 2022Article
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Authors and funding
7 authors.
Funding
Abstract
backgroundFemale breast cancer incidence rates have been increasing in Portugal for years. We, therefore, conducted the first nationwide breast cancer study to assess regional differences.
methodsCases were obtained from population-based cancer registries covering the country's Mainland (South, North, Centre), as well as the two Autonomous Regions (Azores and Madeira), for the time-period 1998 through 2011. Analyses were restricted to ages 30-84 years and stratified by region. We used the age-period-cohort (APC) framework to complement standard descriptive techniques and to forecast future trends. Estimable APC parameters included net drift, longitudinal age-specific incidence rate curves, and fitted age-specific incidence rate ratios.
resultsThere were 71 545 breast cancer cases diagnosed in Portugal at ages 30-84 years from 1998 to 2011. The South presented the highest age-standardized rate (155.8/100 000), while the North presented the fastest rate of increase (3.6%/year). Age-specific statistical interactions were observed between regions. Younger women in the North revealed a decreased risk of developing breast cancer compared to women from the same age group in the South and Centre, while that risk was reversed in older women (p < 0.05). We estimate that from 2014 onwards, the North might rank first among all regions.
conclusionThe variant patterns observed could be due to a combination of different screening practices and/or exposure to risk factors across regions. Disease heterogeneity among younger and older women may also explain part of the differences in age-specific rates. These results justify continued monitoring of breast cancer incidence by region.
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