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. 2008 Jul 8;99(1):176-8.
doi: 10.1038/sj.bjc.6604425. Epub 2008 Jun 10.

Sleep duration and the risk of prostate cancer: the Ohsaki Cohort Study

M Kakizaki  1 , K Inoue, S Kuriyama, T Sone, K Matsuda-Ohmori, N Nakaya, S Fukudo, I Tsuji; Ohsaki Cohort Study
Affiliations

Sleep duration and the risk of prostate cancer: the Ohsaki Cohort Study

M Kakizaki et al. Br J Cancer. .

Abstract

In a prospective study of prostate cancer incidence (127 cases), among 22 320 Japanese men, sleep duration was associated with lower risk; the multivariate hazard ratio of men who slept >or=9 h per day compared with those who slept less was 0.48 (95% confidence interval: 0.29-0.79, P for trend=0.02).

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