Liu 2010.

Study characteristics
Methods	PCC in China
Participants	Participants: 641 (male/female: NR) cases and 1847 (male/female: NR) controls Inclusion criteria: mean age 63.5 years in both cases and controls, residents in Dafeng City, Jiangsu Province, China Recruitment: from January 2005‐December 2007
Interventions	N/A
Outcomes	Number of cases Stomach cancer: 641 (male/female: NR) cases
Green tea in exposure categories	Exposure assessment: green tea drinking Lowest exposure: nondrinkers Highest exposure: > 21 cups/week
Notes	Article in Chinese Funding: not declared Statistical methods: unconditional logistic regression Variables controlled in analysis: age, sex, education level, income, smoking status, alcohol drinking and family history of stomach cancer Variables controlled by matching: ‐