Le Marchand 2000.

Study characteristics
Methods	PCC in USA
Participants	Participants: 582 (male/female: 375/207) cases and 582 (male/female: 375/207) controls Inclusion criteria: aged 26‐79 years, histologically confirmed primary lung cancer, no history of lung cancer, appropriate ethnicity, Oahu residents, Hawaii State, USA Recruitment: from 1 January 1992‐31 March 1997
Interventions	N/A
Outcomes	Number of cases Lung cancer: 582 (male/female: 375/27) cases
Green tea in exposure categories	Exposure assessment: green tea intake Lowest exposure: lowest quartile < 0.0 g/d Intermediate exposure 1: between 0.0 to median value g/d Intermediate exposure 2: between median value to 171.1 g/d Highest exposure: highest quartile > 171.1 g/d
Notes	Funding: Public Health Service R01CA55874 and contract N01CP67001 from National Cancer Institute and EDT‐78 grant from the American Cancer Society Statistical methods: Poisson regression Variables controlled in analysis: matching variables, smoking status, duration, duration^2, number of cigarettes smoked/d and beta‐carotene and saturated fat intake Variables controlled by matching: age, sex and ethnicity