Breast cancer and breastfeeding: collaborative reanalysis of individual data from 47 epidemiological studies in 30 countries, including 50 302 women with breast cancer and 96 973 women without the disease

  title={Breast cancer and breastfeeding: collaborative reanalysis of individual data from 47 epidemiological studies in 30 countries, including 50 302 women with breast cancer and 96 973 women without the disease},
  author={Torgil R. M{\"o}ller and Hampus Olsson and Jonas Ranstam},
  journal={The Lancet},
Breastfeeding and incidence of breast cancers in the UK Women's Cohort Study
There is no evidence of any association between breastfeeding and the risk of breast cancer in the UK Women’s Cohort Study, and the biological mechanisms underlying these associations are uncertain.
Breastfeeding Associated with Reduced Mortality in Women with Breast Cancer.
A total breastfeeding history >6 months and pregnancy are associated with both greater overall and breast cancer-specific survival for women diagnosed with breast cancer, having lived long enough for other causes of death to contribute substantially to mortality.
Breast cancer risk among women with long-standing lactation and reproductive parameters at low risk level: a case–control study in Northern Tanzania
Long-standing lactation and reproductive behaviour are associated with a lower breast cancer risk in the region and should be included in preventive efforts on reproductive and breastfeeding behaviour.
Breastfeeding and breast cancer: a case-control study in Southern Brazil.
It is found that breastfeeding did not have a protective effect against breast cancer in Southern Brazil and the main study variables were occurrence of breastfeeding and duration of breastfeeding.
A pooled analysis of breast-feeding and breast cancer risk by hormone receptor status in parous Hispanic women.
It is suggested that breast-feeding is associated with reduced risk of both HR+ and ER-PR- breast cancer among Hispanic women, as reported for other populations, and may attenuate the increased risk in women with a first pregnancy at older ages.
Breastfeeding and Risk of Breast Cancer: Case-Control Study
The aim of this study was to investigate a possible association of breast cancer occurrence in women with their breastfeeding experience, and it is one of the few in which breastfeeding was found to be a risk factor for breast cancer.
Pregnancies, breast-feeding, and breast cancer risk in the International BRCA1/2 Carrier Cohort Study (IBCCS).
BRCA1 and BRCA2 mutation carriers older than 40 years show a similar reduction in breast cancer risk with increasing parity as non-carriers.


Breastfeeding and breast cancer risk by age 50 among women in Germany
The study results support a protective role of prolonged breastfeeding against the development of breast cancer in predominantly premenopausal women in Germany.
Breastfeeding experience and breast cancer risk among postmenopausal women.
  • S. Enger, R. Ross, A. Paganini-Hill, L. Bernstein
  • Medicine
    Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology
  • 1998
There is some evidence that the protective effect of breastfeeding persists into the postmenopausal years, and the association was attenuated after accounting for lifetime duration of breastfeeding.
Lactation and breast cancer risk.
The findings suggest that any lactation, regardless of duration or timing, is associated with a slight reduction in the risk of breast cancer among younger and older parous women.
Breastfeeding history, pregnancy experience and risk of breast cancer.
A protective role of breastfeeding and an adverse role of nausea or vomiting during pregnancy in the development of premenopausal breast cancer, especially in the years immediately following pregnancy are supported.
Breast cancer and lactation history in Mexican women.
The declining trend in fertility and lactation among Mexican women could lead to a major epidemic of breast cancer such as that observed in Western countries.