Khan 2004.

Study characteristics
Methods	Cohort study in Japan
Participants	Participants: 3158 (male/female: 1524/1634) participants Inclusion criteria: aged ≥ 40 years, attending the 45 Public Health Centres located in the Hokkaido Prefecture, Japan Recruitment: 2002
Interventions	N/A
Outcomes	Number of cases Outcome assessment: 31 December 1993 Total cancer mortality: 243 (male/female: 154/89) cases Lung cancer mortality: 51 (male/female: 40/10) cases Stomach cancer mortality: 51 (male/female: 36/15) cases Colorectal cancer mortality: 29 (male/female: 15/14) cases Pancreatic cancer mortality: 25 (male/female: 12/13) cases Other cancers mortality: 88 (male/female: 51/37) cases
Green tea in exposure categories	Exposure assessment: green tea intake Lowest exposure: never drink or drink several times per year or per month Highest exposure: drink several times/week or every day
Notes	Funding: Department of Health and Welfare of Hokkaido Government, Japan Statistical methods: Cox proportional hazard regression Variables controlled in analysis: age and smoking Variables controlled by matching: ‐