Song 2008

Methods	Case‐control study, population‐based in USA
Participants	781 cases, 1,263 controls
Interventions	N/A
Outcomes	Association of green tea consumption with cancer risk Adjusted for age, county, year of diagnosis/reference date, race/ethnicity, number of full‐term pregnancies, duration of hormonal contraception, education, body mass index, smoking, tubal ligation/hysterectomy, and family history of breast/ovarian cancer
Cancer type & time of follow‐up	Ovarian cancer
Sponsor	NIH grant, USA
Notes	Non‐drinkers OR = 1.00 < 1 cup/day OR = 0.82 (95% CI, 0.66 to 1.04) ≥1 cups/day OR = 0.46 (95% CI, 0.26 to 0.84) p = 0.01 When Asian women were excluded from analysis: Non‐drinkers OR = 1.00 < 1 cup/day OR = 0.81 (no CIs provided) ≥1 cups/day OR = 0.41 (no CIs provided) p = 0.003