Kono 1988

Methods	Case‐control study, Hospital and population‐based in Japan
Participants	139 cases, 2,852 controls
Interventions	N/A
Outcomes	Association of green tea consumption and risk of cancer matched for age and sex Adjusted for age, gender and occupational class
Cancer type & time of follow‐up	Gastric cancer
Sponsor	Grant‐in‐Aid, Ministry of Education, Science and Culture, Japan
Notes	Low green tea consumption: RR = 1.00 Intermediate green tea consumption: RR = 1.2 High green tea consumption: RR = 0.4 (p< 0.05) ≥10 cups/day versus less comparison with hospital controls: RR = 0.5 (95% CI, 0.3 to 1.1) (p = 0.10) comparison with general population controls: RR = 0.3 (95% CI, 0.1 to 0.7) (p = 0.007)