Association between breast cancer and exposure to bovine leukemia virus.

1Logistic regression. Adjusted models include age, race and catchment area for All Subjects; age and catchment for Caucasian or Unknown; and only age for African Americans due to the small sample size. Further adjustment of All Subjects for large area of mammary epithelium or long-term storage increased the odds ratio.2BLV negative subjects are the referent.Association between breast cancer and exposure to bovine leukemia virus.