Inoue 1998

Methods	Case‐control study, hospital‐Based in Japan
Participants	1,706 cases, sub‐cohort control
Interventions	N/A
Outcomes	Association of green tea consumption withdigestive tract cancer risk Not matched but first visit outpatients without cancer as controls Adjusted for gender, age, smoking, alcohol, exercise, fruit, rice and meat consumption
Cancer type & time of follow‐up	Digestive tract cancer
Sponsor	Grant‐in‐Aid for Cancer Research, Ministry of Health and Welfare, Japan
Notes	Esophagus cancer: Green tea consumption Rarely             OR = 1.00 Occasionally   OR = 1.02 (95% CI, 0.5 to 2.1) 1 to 3 cups/day OR = 1.07 (95% CI, 0.58 to 2.00) 4 to 6 cups/day OR = 0.96 (95% CI, 0.5 to 1.83) ≥ 7 cups/day OR = 1.14 (95% CI, 0.55 to 2.34) Stomach cancer Green tea consumption Rarely             OR = 1.00 Occasionally   OR = 1.00 (95% CI, 0.77 to 1.44) 1 to 3 cups/day OR = 0.96 (95% CI, 0.70 to 1.32) 4 to 6 cups/day OR = 1.01 (95% CI, 0.74 to 1.39) ≥ 7 cups/day OR = 0.69 (95% CI, 0.48 to 1.00) (p<.05) Colon cancer Green tea consumption Rarely             OR = 1.00 Occasionally   OR = 0.62 (95% CI, 0.36 to 1.05) 1 to 3 cups/day OR = 0.64 (95% CI, 0.42 to 1.00) 4 to 6 cups/day OR = 0.76 (95% CI, 0.49 to 1.17) ≥ 7 cups/day OR = 0.77 (95% CI, 0.47 to 1.26) Rectum cancer Green tea consumption Rarely             OR = 1.00 Occasionally   OR = 1.41 (95% CI, 0.7 to 2.83) 1 to 3 cups/day OR = 1.04 (95% CI, 0.55 to 1.98) 4 to 6 cups/day OR = 1.42 (95% CI, 0.75 to 2.69) ≥ 7 cups/day OR = 1.25 (95% CI, 0.62 to 2.51)