Saito 2015.

Study characteristics
Methods	Cohort study in Japan
Participants	Participants: 140,420 (male/female: 68,722/71,698), with 61,595 from cohort 1 and 78,825 from cohort 2 and 90,914 (male/female: 42,836/48,078) participants with complete data Inclusion criteria: aged 40‐59 years, from 5 Public Health Centre areas (Iwate, Akita, Nagano, Okinawa and Tokyo) for cohort 1, and aged 40‐69 years for cohort 2 from 6 Public Health Centre areas (Ibaraki, Niigata, Kochi, Nagasaki, Okinawa and Osaka), respondent at 5‐year follow‐up Parent cohorts Cohort 1: Japan Public Health Centre‐based Prospective Study (JPHC)‐I cohort 2: Japan Public Health Centre‐based Prospective Study (JPHC)‐II Recruitment: from 1990 for cohort 1 and 1993/1994 for cohort 2
Interventions	N/A
Outcomes	Number of cases Outcome assessment: 31 December 2011 Total cancer mortality: 5327 (male/female: 3468/1859) cases
Green tea in exposure categories	Exposure assessment: green tea drinking Lowest exposure: < 1 cup/d Intermediate exposure 1: 1‐2 cups/d Intermediate exposure 2: 3‐4 cups/d Highest exposure: ≥ 5 cups/d
Notes	Funding: by the National Cancer Center Research and Development Fund (23‐A‐31[toku] and 26‐A‐2; since 2011), by a Grant‐in‐Aid for Cancer Research from the Ministry of Health, Labour and Welfare of Japan (from 1989 to 2010) and by Health and Labour Sciences Research Expenses for Commission (Comprehensive Research on Life‐Style Related Diseases including Cardiovascular Diseases and Diabetes Mellitus H26‐005) Statistical methods: Cox proportional hazard regression Variables controlled in analysis: age, Public Health Centre area, BMI, history of hypertension, history of diabetes, leisure‐time sports or physical exercise, intake of coffee, Chinese tea, black tea and soda or juice, energy intake and intakes of fruits, vegetables, fish, meat, dairy products, rice and miso soup and job status (stratified by sex) Variables controlled by matching: ‐