Do the known risk factors explain the high rate of breast cancer in Marin?
A. The results of the Traditional Risk Factor Study (TRIFS) suggest that approximately 50% of the breast cancer cases in Marin County are attributable to younger age at menarche (under 12 years old), delaying childbirth until after age 30, having no children, family history, older age at menopause (over 55 years old), and high postmenopausal body mass index. About 30% of the breast cancer cases in Marin are attributable to a later age (after age 29) at first child birth/nulliparity. Click here to view or download a pdf document containing a compilation of breast cancer research in Marin 2001-2003.
