Risk factors for breast cancer in women under 40 years

A. Tavani; S. Gallus; C. La Vecchia; E. Negri; M. Montella; L. Dal Maso; S. Franceschi

doi:10.1016/S0959-8049(99)00139-2

Risk factors for breast cancer in women under 40 years

A. Tavani, S. Gallus, C. La Vecchia, E. Negri, M. Montella, L. Dal Maso, S. Franceschi

Research output: Contribution to journal › Article › peer-review

Abstract

The relation between hormonal and lifestyle factors and breast cancer risk in women younger than 40 years was investigated using data from two case-control studies conducted in Italy between 1983 and 1994. Cases were 579 women with histologically confirmed, incident breast cancer and controls were 668 women admitted to hospital for acute, non-neoplastic, non-hormone-related diseases. Breast cancer risk was inversely related to age at menarche with a multivariate odds ratio (OR) of 0.53 (95% confidence interval, CI, 0.31-0.89) for women reporting menarche at the age of ≥15 years compared with 2 compared to

Original language	English
Pages (from-to)	1361-1367
Number of pages	7
Journal	European Journal of Cancer
Volume	35
Issue number	9
DOIs	https://doi.org/10.1016/S0959-8049(99)00139-2
Publication status	Published - Sep 1999

Keywords

Breast neoplasms
Case-control studies
Diet
Hormonal factors
Oral contraceptives
Reproductive factors
Risk factors

ASJC Scopus subject areas

Cancer Research
Hematology
Oncology

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abstract = "The relation between hormonal and lifestyle factors and breast cancer risk in women younger than 40 years was investigated using data from two case-control studies conducted in Italy between 1983 and 1994. Cases were 579 women with histologically confirmed, incident breast cancer and controls were 668 women admitted to hospital for acute, non-neoplastic, non-hormone-related diseases. Breast cancer risk was inversely related to age at menarche with a multivariate odds ratio (OR) of 0.53 (95% confidence interval, CI, 0.31-0.89) for women reporting menarche at the age of ≥15 years compared with 2 compared to ",

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AU - Gallus, S.

AU - La Vecchia, C.

AU - Negri, E.

AU - Montella, M.

AU - Dal Maso, L.

AU - Franceschi, S.

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