OBJECTIVE: We systematically reviewed and meta-analyzed literature examining associations of vitamin D (dietary intake, circulating 25-hydroxy-vitamin-D (25(OH)D), and 1,25-dihydroxy-vitamin-D (1,25(OH)(2)D) concentrations) with prostate cancer. METHODS: We searched over 24,000 papers from seven electronic databases (to October 2010) for exposures related to vitamin D. We conducted dose-response random-effects meta-analyses pooling the log odds ratio (OR) and 95% confidence intervals (CI) per change in natural units of each exposure. The I(2) statistic quantified between-study variation due to heterogeneity. RESULTS: Twenty-five papers were included. In prospective studies, the OR per 1,000 IU increase in dietary intake was 1.14 (6 studies; CI: 0.99, 1.31; I (2) = 0%) for total prostate cancer and 0.93 (3 studies; 0.63, 1.39; I (2) = 25%) for aggressive prostate cancer. Five case-control studies examined dietary intake, but there was a high degree of inconsistency between studies (I (2) = 49%). The OR per 10 ng/mL increase in 25(OH)D was 1.04 (14 studies; 0.99, 1.10; I (2) = 0%) for total prostate cancer and 0.98 (6 studies; 0.84, 1.15; I (2) = 32%) for aggressive prostate cancer. The OR per 10 pg/mL increase in 1,25(OH)(2)D was 1.00 (7 studies; 0.87, 1.14; I (2) = 41%) for total prostate cancer and 0.86 (2 studies; 0.72, 1.02; I (2) = 0%) for aggressive prostate cancer. CONCLUSION: Published literature provides little evidence to support a major role of vitamin D in preventing prostate cancer or its progression.
OBJECTIVE: We systematically reviewed and meta-analyzed literature examining associations of vitamin D (dietary intake, circulating 25-hydroxy-vitamin-D (25(OH)D), and 1,25-dihydroxy-vitamin-D (1,25(OH)(2)D) concentrations) with prostate cancer. METHODS: We searched over 24,000 papers from seven electronic databases (to October 2010) for exposures related to vitamin D. We conducted dose-response random-effects meta-analyses pooling the log odds ratio (OR) and 95% confidence intervals (CI) per change in natural units of each exposure. The I(2) statistic quantified between-study variation due to heterogeneity. RESULTS: Twenty-five papers were included. In prospective studies, the OR per 1,000 IU increase in dietary intake was 1.14 (6 studies; CI: 0.99, 1.31; I (2) = 0%) for total prostate cancer and 0.93 (3 studies; 0.63, 1.39; I (2) = 25%) for aggressive prostate cancer. Five case-control studies examined dietary intake, but there was a high degree of inconsistency between studies (I (2) = 49%). The OR per 10 ng/mL increase in 25(OH)D was 1.04 (14 studies; 0.99, 1.10; I (2) = 0%) for total prostate cancer and 0.98 (6 studies; 0.84, 1.15; I (2) = 32%) for aggressive prostate cancer. The OR per 10 pg/mL increase in 1,25(OH)(2)D was 1.00 (7 studies; 0.87, 1.14; I (2) = 41%) for total prostate cancer and 0.86 (2 studies; 0.72, 1.02; I (2) = 0%) for aggressive prostate cancer. CONCLUSION: Published literature provides little evidence to support a major role of vitamin D in preventing prostate cancer or its progression.
Authors: C J Paller; Y M Kanaan; D A Beyene; T J Naab; R L Copeland; H L Tsai; N F Kanarek; T S Hudson Journal: Prostate Date: 2015-06-05 Impact factor: 4.104
Authors: José Manuel Ordóñez-Mena; Ben Schöttker; Veronika Fedirko; Mazda Jenab; Anja Olsen; Jytte Halkjær; Ellen Kampman; Lisette de Groot; Eugene Jansen; H Bas Bueno-de-Mesquita; Petra H Peeters; Galatios Siganos; Tom Wilsgaard; Laura Perna; Bernd Holleczek; Ulrika Pettersson-Kymmer; Philippos Orfanos; Antonia Trichopoulou; Paolo Boffetta; Hermann Brenner Journal: Eur J Epidemiol Date: 2015-05-15 Impact factor: 8.082
Authors: Jack Cuzick; Mangesh A Thorat; Gerald Andriole; Otis W Brawley; Powel H Brown; Zoran Culig; Rosalind A Eeles; Leslie G Ford; Freddie C Hamdy; Lars Holmberg; Dragan Ilic; Timothy J Key; Carlo La Vecchia; Hans Lilja; Michael Marberger; Frank L Meyskens; Lori M Minasian; Chris Parker; Howard L Parnes; Sven Perner; Harry Rittenhouse; Jack Schalken; Hans-Peter Schmid; Bernd J Schmitz-Dräger; Fritz H Schröder; Arnulf Stenzl; Bertrand Tombal; Timothy J Wilt; Alicja Wolk Journal: Lancet Oncol Date: 2014-10 Impact factor: 41.316