Zhang 2002

Methods	Case‐control study, hospital and population‐based in China
Participants	254 cases, 652 controls
Interventions	N/A
Outcomes	Association of green tea consumption with cancer risk Matched for age and geographical area (all women) Adjusted for age, education, living area, BMI, tobacco smoking, alcohol consumption, coffee drinking, family income, marital status, menopause status, parity, tubal ligation, oral contraceptive use, physical activity, and family history of ovarian cancer
Cancer type & time of follow‐up	Ovarian cancer
Sponsor	Main author partially supported by Australian federation of University Women
Notes	"Never or seldom" OR = 1.00 At most 1 time/week OR = 1.0 (95% CI, 0.24 to 0.73) Green tea consumption 2 to 6 times/week OR = 0.42 (95% CI, 0.23 to 0.7) Green tea consumption at least 1 time/day OR= 0.43 (95% CI, 0.3 to 0.63) p = 0.001