Epidemiology
British Journal of Cancer (2006) 95, 371–373. doi:10.1038/sj.bjc.6603230 www.bjcancer.com
Published online 27 June 2006
No association between green tea and prostate cancer risk in Japanese men: the Ohsaki Cohort Study
N Kikuchi1, K Ohmori1, T Shimazu1, N Nakaya1, S Kuriyama1, Y Nishino2, Y Tsubono3 and I Tsuji1
- 1Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
- 2Department of Epidemiology, Miyagi Cancer Center, Natori 981-1293, Japan
- 3Division of Health Policy, Tohoku University School of Public Policy, Sendai 980-8576, Japan
Correspondence: Dr N Kikuchi, E-mail: nkikuchi@mail.tains.tohoku.ac.jp
Received 20 April 2006; Revised 25 May 2006; Accepted 31 May 2006; Published online 27 June 2006.
Abstract
In a prospective study of 19 561 Japanese men, green-tea intake was not associated with a lower risk of prostate cancer (110 cases), the multivariate hazard ratio for men drinking 
5 cups compared with <1 cup per day being 0.85 (95% confidence interval 0.50–1.43, trend P=0.81).
Keywords:
green tea, prostate cancer, prospective cohort study
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