Breastfeeding and breast cancer: a case-control study in Southern Brazil

Cadernos de Saúde Pública

Sérgio Tessaro²  Jorge U. Béria¹  Elaine Tomasi¹  Cesar G. Victora¹ 

[1] ,Universidade Federal de Pelotas Faculdade de Medicina Departamento Materno InfantilPelotas RS ,Brazil

关键词: Breast Neoplasms;    Breastfeeding;    Case-Control Studies;    Neoplasias Mamárias;    Aleitamento Materno;    Estudos de Casos e Controles;   

DOI  :  10.1590/S0102-311X2003000600004

来源: SciELO

【 摘 要 】

To investigate the relationship between breastfeeding and breast cancer in Southern Brazil, a case-control design was employed, with two age-matched control groups. A total of 250 cases of breast cancer were identified in women from 20 to 60 years of age, with 1,020 hospital and community controls. The main study variables were occurrence of breastfeeding and duration of breastfeeding. A multivariate conditional logistic regression analysis was employed. According to the results, breastfeeding did not have a protective effect against breast cancer. The odds ratio (OR) for women who breastfed was 0.9 (95% CI: 0.8-1.2) compared to women who did not breastfeed. For women who breastfed for six months or less, the OR was 1.0 (95% CI: 0.6-1.8). In pre-menopausal women who breastfed for more than 25 months, the OR was 0.95 (95% CI: 0.5-3.5), and in post-menopausal women OR was 1.27 (95% CI: 0.5-3.1), compared to women who had not breastfeed.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License