Is breast cancer incidence increasing among young women? An analysis of the trend in France for the period 1983–2002

Abstract The purpose of the study was to describe the trend in the incidence of breast cancer in women under 40 in France for the period 1983–2002 and compare it with the trend observed in other age groups. Data from seven cancer registries were analysed. Annual percentage changes were estimated in...

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Bibliographic Details
Published in:Breast (Edinburgh) 2008-06, Vol.17 (3), p.289-292
Main Authors: Colonna, Marc, Delafosse, Patricia, Uhry, Zoé, Poncet, Florence, Arveux, Patrick, Molinie, Florence, Cherie-Challine, Laurence, Grosclaude, Pascale
Format: Article
Language:English
Subjects:
Adolescent
Adult
Age Factors
Aged
Breast cancer
Breast Neoplasms - epidemiology
Cancer registries
Female
France - epidemiology
Hematology, Oncology and Palliative Medicine
Humans
Incidence
Middle Aged
Registries
Risk factors
Screening
Trend
Young women
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Summary:Abstract The purpose of the study was to describe the trend in the incidence of breast cancer in women under 40 in France for the period 1983–2002 and compare it with the trend observed in other age groups. Data from seven cancer registries were analysed. Annual percentage changes were estimated in different age groups using Poisson regression. During the period 1983–2002, breast cancer incidence in women under 40 increased regularly, with an estimated annual percentage change of 0.65 (95% CI: 0.03–1.26). In women aged over 40, the increase is more significant, particularly among women aged 50–74 (2.93% per year). The increase in breast cancer incidence in women under 40 was low and steady over the 20-year period considered. Even though young women did not experience such a major change in diagnostic practices as the development of screening among women aged 50–74, it is difficult to distinguish the effects of possible changes in risk factors and in diagnostic practices in the slight increase observed.
ISSN:0960-9776
1532-3080
DOI:10.1016/j.breast.2007.10.017