In the New England Journal of Medicine, researchers from the National Cancer Institute say breast cancer risk assessment models don't perform any better when they include common inherited genetic variants linked to the disease. The study's senior investigator, Sholom Wacholder, says the improvement in the risk models wasn't enough to matter to a majority of women. Wacholder and his team combined data from five studies, altogether including 5,590 breast cancer patients and 5,998 healthy women.