PMID: 8611387Mar 1, 1996Paper

A case-control study of lactation and cancer of the breast

British Journal of Cancer
K KatsouyanniD Trichopoulos

Abstract

We have examined the relation of lactation, by total duration, with breast cancer risk among pre- and post-menopausal women. In a hospital-based case-control study conducted in Athens (1989-91), involving 820 patients with confirmed breast cancer and 795 orthopaedic patient controls and 753 hospital visitor controls, logistic regression was used to analyse the data controlling for demographic, nutritional and reproductive factors, including parity and age at any birth. Among post-menopausal women, there was no association between breastfeeding and breast cancer risk, but among premenopausal women those who has breastfed for > or = 24 months had an odds ratio of 0.50 (95% confidence interval 0.23-1.41). A reduction of the odds ration was also evident among premenopausal women who had breastfed between 12 and 23 months (odds ratio 0.70; 95% confidence interval 0.34-1.60). In conjunction with several other recent reports these results support the hypothesis that breastfeeding of prolonged duration may reduce the risk of breast cancer among premenopausal women but not among post-menopausal women. The biology underlying this different effect remains unknown, and the practical implication of the finding is a marginal importance.

Citations

Jun 5, 1998·Journal of Women's Health·A Dermer
Apr 22, 2003·International Journal of Cancer. Journal International Du Cancer·Soon Young LeeSoo Jin Yoon
Feb 14, 2007·European Journal of Cancer Prevention : the Official Journal of the European Cancer Prevention Organisation (ECP)·Yeonju KimKeun-Young Yoo
May 28, 2013·Asia-Pacific Journal of Public Health·Thunyarat AnothaisintaweeAmmarin Thakkinstian
Jul 15, 2015·Acta Paediatrica·Ranadip ChowdhuryJose Martines
Apr 10, 1997·International Journal of Cancer. Journal International Du Cancer·S O StuverD Trichopoulos
Nov 28, 2001·Revista de saúde pública·G A Mendonça, J Eluf-Neto
Dec 29, 2000·American Journal of Epidemiology·T ZhengP H Owens
Jun 22, 2000·International Journal of Cancer. Journal International Du Cancer·Y T GaoW Zheng
Jan 1, 1997·Nutrition Research Reviews·M J Heinig, K G Dewey
Nov 19, 2009·Cancer Causes & Control : CCC·Msolly AwatefBen Ahmed Slim
May 23, 2015·Women & Health·Milena IlicJelena Marinkovic

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