Parity hormones and breast cancer subtypes - results from a large nested case-control study in a national screening program

摘要

BackgroundBreast cancer comprises several molecular subtypes with different prognoses and possibly different etiology. Reproductive and hormonal factors are associated with breast cancer overall, and with luminal subtypes, but the associations with other subtypes are unclear. We used data from a national screening program to conduct a large nested case-control study.