Sasazuki 2004

Methods	Case‐control study within a cohort study in Japan
Participants	72,273 cohort participants 892 cases, sub‐cohort control
Interventions	N/A
Outcomes	Incidence and mortality Adjusted for age, residence, smoking
Cancer type & time of follow‐up	Gastric cancer (6 to 11 years follow‐up)
Sponsor	Grant‐in‐Aid for Cancer Research, Ministry of Health, Labour and Welfare, Japan
Notes	Men: < 1 cup / day RR (Cohort I) = 1.00 RR (Cohort II) = 1.00 1 to 2 cups / day RR (Cohort I) = 0.95 (95% CI, 0.74 to 1.21) RR (Cohort II) = 0.94 (95% CI, 0.72 to 1.22) 3 to 4 cups / day RR (Cohort I) = 0.89 (95% CI, 0.71 to 1.13) RR (Cohort II) = 0.84 (95% CI, 0.65 to 1.08) > 5 cups / day RR (Cohort I) = 0.97 (95% CI, 0.77 to 1.22) RR (Cohort II) = 0.98 (95% CI, 0.77 to 1.25) Cohort I p = 0.81 Cohort II p = 0.65 Women: < 1 cup / day RR (Cohort I) = 1.00 RR (Cohort II) = 1.00 1 to 2 cups / day RR (Cohort I) = 0.93 (95% CI, 0.61 to 1.41) RR (Cohort II) = 0.85 (95% CI, 0.53 to 1.38) 3 to 4 cups / day RR (Cohort I) = 1.10 (95% CI, 0.75 to 1.60) RR (Cohort II) = 1.04 (95% CI, 0.68 to 1.58) > 5 cups / day RR (Cohort I) = 0.70 (95% CI, 0.47 to 1.05) RR (Cohort II) = 0.67 (95% CI, 0.43 to 1.04) Cohort I p = 0.15 Cohort II p = 0.08