Goodman 2003.

Study characteristics
Methods	PCC in USA
Participants	Participants: 164 cases and 194 controls (all women) Inclusion criteria: aged 18‐84 years, diagnosed with epithelial ovarian cancer. Controls Oahu residents from Hawai Health Survey Program and from women aged ≥ 65 years, in the Health Care Financing Administration on Oahu, Hawaii, USA Recruitment: from 1 July 1993‐30 June 1999
Interventions	N/A
Outcomes	Number of cases Ovarian cancer: 164 cases of epithelial ovarian cancer
Green tea in exposure categories	Exposure assessment: drinking of green tea (yes/no) Lowest exposure: no drinking Highest exposure: drinking green tea further divided in: Highest exposure 1: < 1 cup/week Highest exposure 2: ≥ 1 cups/week
Notes	Funding: by the Anneliese Lermann Fund for Cancer Research, US Public Health Service grants R01‐CA‐58598 and P30‐CA‐71789 and contracts N01‐CN‐55424 and N01‐PC‐67001 from the National Cancer Institute. Statistical methods: unconditional logistic regression Variables controlled in analysis: age, ethnicity, oral contraceptive pill use and tubal ligation. Variables controlled by matching: ‐