Exposure to Breastmilk in Infancy and the Risk of Breast Cancer

Early childhood nutrition may affect the subsequent risk of breast cancer in adulthood. We examined the association of having been breastfed with risk of breast cancer in a case-control study of women age 40-85 years in western New York. Cases (N = 528) had newly diagnosed primary, pathologically confirmed breast cancer; controls (N = 602) were randomly selected from the same community and were frequency matched on age. Having been breastfed …