Serum 25-OH vitamin D levels and risk of developing prostate cancer in older men

Cancer Causes & Control - Tập 21 - Trang 1297-1303 - 2010
Christine M. Barnett1, Carrie M. Nielson2, Jackie Shannon2,3, June M. Chan4, James M. Shikany5, Douglas C. Bauer6, Andrew R. Hoffman7, Elizabeth Barrett-Connor8, Eric Orwoll9, Tomasz M. Beer1
1Division of Hematology and Medical Oncology and the Knight Cancer Institute, Oregon Health & Science University, Portland, USA
2Department of Public Health & Preventive Medicine, Oregon Health & Science University, Portland, USA
3Portland VA Medical Center and CROET, Oregon Health & Science University, Portland, USA
4Departments of Epidemiology & Biostatistics and Urology, University of California San Francisco, San Francisco, USA
5Division of Preventive Medicine, University of Alabama at Birmingham, Birmingham, USA
6University of California, Oakland, San Francisco, USA
7Department of Medicine, Stanford University, Stanford, USA
8Division of Epidemiology, Department of Family and Preventative Medicine, University of California, San Diego, USA
9Bone and Mineral Unit, Division of Endocrinology, Oregon Health & Science University, Portland, USA

Tóm tắt

Multiple studies have shown clear evidence of vitamin D’s anti-tumor effects on prostate cancer cells in laboratory experiments, but the evidence has not been consistent in humans. We sought to examine the association between vitamin D and prostate cancer risk in a cohort of older men. We conducted a prospective case-cohort study nested within the multicenter Osteoporotic Fractures in Men (MrOS) study. Baseline serum 25-OH vitamin D was measured in a randomly selected sub-cohort of 1,433 men ≥65 years old without a history of prostate cancer and from all participants with an incident diagnosis of prostate cancer (n = 297). Cox proportional hazards models were used to evaluate the associations between quartiles of total 25-OH vitamin D and incident prostate cancer, as well as Gleason score. In comparison with the lowest quartile of 25-OH vitamin D, the hazard ratio for the highest quartile of 25-OH vitamin D was 1.22 (CI 0.50–1.72, p = 0.25), no trend across quartiles (p = 0.94) or association with Gleason score was observed. Adjustment for covariates did not alter the results. In this prospective cohort of older men, we found no association between serum 25-OH vitamin D levels and subsequent risk of prostate cancer.

Tài liệu tham khảo

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