VDR and breast carcinoma: When tertiles of vitamin D and risk of VDR-positive tumors were analyzed, the results were similar to overall breast cancer risk with a tendency towards a lower OR within the group of medium levels of vitamin D in the crude (OR: 0.81, 95% CI: 0.62–1.07) and the adjusted analysis (OR: 0.80, 95% CI:0.60–1.06).