Nechuta 2012.

Study characteristics
Methods	Cohort study in China
Participants	Participants: 74,941 Chinese women. Final data on 67,230 women witch complete and reliable data on dietary information and reporting consumption of green tea alone or in combination with other types of tea. In Yang 2007: final population of 69,710 participants Inclusion criteria: women aged 40‐70 years, no history of cancer at baseline recruited in seven urban areas in Shanghai, China Parent cohort: Shangai Women's Health Study Recruitment: from December 1996‐May 2000 Data on the same cohort also reported in Dai 2010
Interventions	N/A
Outcomes	Number of cases Nechuta 2012 Outcome assessment: 31 December 2005 Digestive system cancer: 1239 cases Stomach cancer: 287 cases Stomach and oesophageal cancer: 314 cases Colorectal cancer: 579 cases Colon cancer: 355 cases Rectal cancer: 224 cases Liver cancer: 133 cases Pancreatic cancer: 131 cases Gallbladder and bile duct cancer: 82 cases Yang 2007 Outcome assessment: 2004 Colorectal cancer: 256 cases (all female)
Green tea in exposure categories	Exposure assessment: green tea consumption Lowest exposure: never drinking Highest exposure: ≥ 3 times/week for > 6 months In Yang 2007 Exposure assessment: intake of green tea Lowest exposure: nondrinker Highest exposure: drinker, further divided in amount of green tea consumption: Highest exposure A: 1‐4 g/d Highest exposure B: ≥ 5 g/d
Notes	Nechuta 2012 Funding: National Cancer Institute (R37 CA70867) Statistical methods: Cox proportional hazard regression Variables controlled in analysis: age, marital status, education, occupation, BMI, exercise, fruit and vegetable intake, meat intake, diabetes and family history of digestive system cancer Variables controlled by matching: ‐ Yang 2007 Funding: USPHS grant R01CA70867 and National Institue of Health intramural programme, Division of Cancer Epidemiology and Genetics (N02 CP1101066) Statistical methods: Cox proportional hazard regression Variables controlled in analysis: age, education, household income, cigarette smoking, alcohol drinking, physical activity, BMI, menopausal status, nonsteroidal anti‐inflammatory drug use, vitamin supplement use, prior histories of colorectal polyps and chronic ulcerative colitis, family history of colorectal cancer and intakes of total energy, vegetables, fruits and red meat Variables controlled by matching: ‐