Assessment of salivary cadmium levels and breast density in the Marin Women's Study.

Background: We aimed to determine if salivary cadmium (Cd) levels had any association with breast density, hoping to establish a less invasive cost-effective method of stratifying Cd burden as an environmental breast cancer risk factor.

Methods: Salivary Cd levels were quantified from the Marin Women's Study, a Marin County, California population composite. Volumetric compositional breast density (BD ) data were measured by single x-ray absorptiometry techniques.