Takezaki 2001.

Study characteristics
Methods	HCC in Japan
Participants	Participants: 945 cases (male/female: 748/297) and 4153 (male/female: 2964/1189) controls Inclusion criteria: newly diagnosed cases, 40‐79 years of age from the Aichi Cancer Center Hospital (ACCH) in Aichi Prefecture, Japan Recruitment: from 1988‐1997 referring to Aichi Cancer Center Hospital
Interventions	N/A
Outcomes	Number of lung cases: Lung cancer: Adenocarcinoma: 507 (male/female: 367/240) cases Squamous cell and small‐cell carcinomas 438 (male/female: 381/57) cases
Green tea in exposure categories	Exposure assessment: green tea intake Lowest exposure: < 1 cup/d Intermediate exposure 1: 1 cup/d Intermediate exposure 2: 2 cups/d Highest exposure: ≥ 3 cups/d
Notes	Funding: Grant‐in‐Aid for Cancer Research and the Comprehensive 10‐year Strategy for Cancer Control from the Ministry of Health and Welfare of Japan Statistical methods: unconditional logistic regression Variables controlled in analysis: age, season and year of visit, occupation, prior lung diseases, smoking and consumption of green vegetables and meat Variables controlled by matching: sex and age (± 5 years)