Tsubono 2001

Methods	Case‐control study within a cohort study in Japan
Participants	26,311 cohort participants 419 cases, sub‐cohort control
Interventions	N/A
Outcomes	Incidence Adjusted for gender; age; type of health insurance; history of peptic ulcer; cigarette smoking;alcohol consumption; daily consumption of rice; consumption of black tea and consumption of coffee; and consumption of meat, green or yellow vegetables, pickled vegetables, other vegetables, fruits, and bean‐paste soup
Cancer type & time of follow‐up	Gastric cancer (8 years follow‐up)
Sponsor	Ministry of Health and Welfare, Japan and Ministry of Education, Science and Culture, Japan
Notes	≤ 1 cups/day: RR = 1.00 1 or 2 cups/day: RR = 1.1 (95% CI, 0.8 to 1.6) 3 or 4 cups/day: RR = 1.0 (95% CI, 0.7 to 1.4) ≥5 cups/day: RR = 1.2 (95% CI, 0.9 to 1.6)