Cadernos de Saúde Pública
On-line version ISSN 1678-4464Print version ISSN 0102-311X
INUMARU, Lívia Emi; SILVEIRA, Érika Aparecida da and NAVES, Maria Margareth Veloso. Risk and protective factors for breast cancer: a systematic review. Cad. Saúde Pública [online]. 2011, vol.27, n.7, pp.1259-1270. ISSN 1678-4464. http://dx.doi.org/10.1590/S0102-311X2011000700002.
This review aimed to investigate risk and protective factors for breast cancer and to analyze whether scientific evidence from the World Cancer Research Fund and American Institute for Cancer Research, published in 2007, was confirmed by new research. In May 2010 we reviewed cohort and case-control analytical studies from 2007 to 2010 in the PubMed, LILACS, and SciELO databases. We selected 27 articles (14 case-control and 13 cohort studies). Breastfeeding and physical activity were protective factors against breast cancer, and alcohol consumption was a risk factor. A direct proportional relationship was observed between larger waist circumference, weight throughout adulthood, and height and risk of breast cancer in postmenopausal women. The association between body fat and breast cancer is contradictory in both premenopausal and postmenopausal women. According to the accumulated evidence, breastfeeding and healthy lifestyle are the factors most strongly associated with breast cancer prevention.
Keywords : Breast Neoplasms; Anthropometry; Alcohol Drinking; Motor Activity; Lactation.