Takezaki 2000.

Study characteristics
Methods	HCC in Japan
Participants	Participants: 127,477 inhabitants of 45 areas of Japan, data retrieved from 66,885 participants: 346 cases and 11,936 controls (all male) included in the present study Inclusion criteria: aged 40‐79 years, from the Aichi Cancer Center Hospital (ACCH) in Aichi Prefecture, Japan. Recruitment: from January 1988‐1997
Interventions	N/A
Outcomes	Number of cases Pharynx (hypopharynx) cancer: 62 (male/female: NR) cases Oesophageal cancer: 284 cases, including 53, 159 and 72 cases in upper, middle and lower third of the oesophagus
Green tea in exposure categories	Exposure assessment: green tea drinking Lowest exposure: occasionally or less Intermediate exposure: 1‐6 cups/d Highest exposure: ≥ 7 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, year and season of visit, smoking and alcohol drinking Variables controlled by matching: ‐