title: Green tea consumption and lung cancer risk: the Ohsaki study.
abstract: We examined the risk of lung cancer in relation to green tea consumption in a population-based cohort study in Japan among 41,440 men and women, aged 40-79 years, who completed a questionnaire in 1994 regarding green tea consumption and other health-related lifestyle factors. During the follow-up period of 7 years (from 1995 to 2001), 302 cases of lung cancer were identified, and the Cox proportional hazards regression model was used to estimate the hazard ratios (HRs) and 95% confidence intervals (CIs). The multivariable-adjusted HRs of lung cancer incidence for green tea consumption of 1 or 2, 3 or 4, and 5 or more cups/day as compared to less than 1 cup/day were 1.14 (95% CI: 0.80-1.62), 1.18 (95% CI: 0.83-1.66), and 1.17 (95% CI: 0.85-1.61), respectively (P for trend=0.48). This cohort study has found no evidence that green tea consumption is associated with lung cancer.
authors.affiliation: Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan. liqiangda@yahoo.com.cn
authors.forename: Q
authors.initials: Q
authors.lastname: Li
authors.forename: M
authors.initials: M
authors.lastname: Kakizaki
authors.forename: S
authors.initials: S
authors.lastname: Kuriyama
authors.forename: T
authors.initials: T
authors.lastname: Sone
authors.forename: H
authors.initials: H
authors.lastname: Yan
authors.forename: N
authors.initials: N
authors.lastname: Nakaya
authors.forename: K
authors.initials: K
authors.lastname: Mastuda-Ohmori
authors.forename: I
authors.initials: I
authors.lastname: Tsuji