Additional file 1: Table S1. of Hormone receptor status of a first primary breast cancer predicts contralateral breast cancer risk in the WECARE study population

Association between first breast cancer HR status and CBC, among women not receiving tamoxifen for first diagnosis. In the WECARE Study population of women who had not received tamoxifen for their first breast cancer diagnosis, having an ER-negative first breast cancer or a PR-negative first breast cancer statistically significantly increased the risk of CBC. (DOCX 19 kb