Vitamin D, PTH, and calcium and the risk of prostate cancer: a prospective nested case-control study.
OBJECTIVE: To examine the risk of prostate cancer in relation to pre-diagnostic serum levels of vitamin D (25OHD(2) and 25OHD(3)), PTH, and calcium. METHODS: Nine hundred forty-three incident prostate cancer cases were identified in the Malmö Diet and Cancer Study cohort, and each was matched with one control using incidence density matching with age as the underlying timescale. We also matche