Article
Serum folate and vitamin B12 concentrations in relation to prostate cancer risk--a Norwegian population-based nested case-control study of 3000 cases and 3000 controls within the JANUS cohort.
International journal of epidemiology - 1 Feb 2013
de Vogel Stefan, Meyer Klaus, Fredriksen Åse, Ulvik Arve, Ueland Per Magne, Nygård Ottar, Vollset Stein Emil, Tell Grethe S, Tretli Steinar, Bjørge Tone
Abstract excerpt
BACKGROUND: Although individual studies have been inconsistent, meta-analyses of epidemiological data suggest that high folate and vitamin B12 levels may be associated with increased prostate cancer risk. METHODS: Within JANUS, a prospective cohort in Norway (n = 317 000) with baseline serum samples, we conducted a nested case-control study among 3000 prostate cancer cases and 3000 controls, matched on age and...
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