a study reported that bone mineral density (bmd) may one day predict breast cancer risk in older women, according to the journal of the national cancer institute. researchers followed the health of 8,905 women who were 65 or older and initially cancer free. eventually 315 participants developed breast cancer. women with the highest bmd were almost three times more likely to develop breast cancer, compared to the women with low bmd. do the results of this study mean that a high bmd level causes breast cancer in older women?