Nakachi 2000.

Study characteristics
Methods	Cohort study in Japan
Participants	Participants: 8552 (male/female: NR) participants Inclusion criteria: aged > 40 years, residents in a town in Saitama Prefecture, Japan Recruitment: from 1986
Interventions	N/A
Outcomes	Number of cases Outcome assessment: 1997 Total cancer incidence: 488 (male/female: NR) cases, including stomach (N = 140), lung (N = 69), colorectal (N = 60) and liver (N = 35) cancer, not individually evaluated
Green tea in exposure categories	Exposure assessment: green tea drinking Lowest exposure: ≤ 3 cups/d Intermediate exposure: 4‐9 cups/d Highest exposure: ≥ 10 cups/d
Notes	Funding: Grants‐in‐Aid for Cancer Research from the Ministry of Education, Science, Sports and Culture of Japan, from the Ministry of Health and Welfare of Japan and from the Ministry of Health and Welfare for a 2nd‐Term Comprehensive 10‐Year Strategy for Cancer Control and by a grant from the Smoking Research Foundation of Japan Statistical methods: Cox proportional hazard regression Variables controlled in analysis: age, cigarette smoking, alcohol consumption, intake of green and yellow vegetables and intake of rice Variables controlled by matching: ‐ Imai 1997 reports same results as Nakachi 2000