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Green-tea consumption and risk of stomach cancer: a population-based case-control study in Shanghai, China.
Cancer Causes Control. 1995 Nov; 6(6):532-8.CC

Abstract

The effect of drinking Chinese green tea on the risk of stomach cancer was evaluated in a population-based case-control study conducted in Shanghai, China, from October 1991 to December 1993. Eligible cases were incident cases of primary stomach cancer diagnosed during the study period among residents of Hongkou district and Nanhui county aged under 80 years. Controls were selected from the same street or commune where the case resided and were matched to the cases on age (within three years) and gender. A total of 711 cases and 711 matched controls, more than 90 percent of the eligible subjects, completed the interview. Information was obtained on the types of tea used, age when habitual tea drinking started, frequency of new batches of tea leaves used per day, number of cups brewed from each batch, total duration of drinking for each batch, strength and temperature of the tea consumed. Statistical analysis was based on modelling through conditional logistic regression. After adjusting for age, gender, place of residence, education, birthplace, alcohol consumption, and cigarette smoking, the odds ratio (OR) comparing drinkers of green tea with nondrinkers was 0.71 (95 percent confidence interval = 0.54-0.93). The adjusted OR decreased with increasing number of new batches of the green tea consumed each day (P value trend = 0.006). With the largest series of stomach cancer cases to date, this study found green-tea consumption associated with lower risk of stomach cancer. Among drinkers of green tea, the risk of stomach cancer did not depend on the age when habitual green-tea drinking started. Green tea may disrupt gastric carcinogenesis at both the intermediate and the late stages.

Authors+Show Affiliations

Department of Epidemiology, School of Public Health, Shanghai Medical University, P.R., China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

8580302

Citation

Yu, G P., et al. "Green-tea Consumption and Risk of Stomach Cancer: a Population-based Case-control Study in Shanghai, China." Cancer Causes & Control : CCC, vol. 6, no. 6, 1995, pp. 532-8.
Yu GP, Hsieh CC, Wang LY, et al. Green-tea consumption and risk of stomach cancer: a population-based case-control study in Shanghai, China. Cancer Causes Control. 1995;6(6):532-8.
Yu, G. P., Hsieh, C. C., Wang, L. Y., Yu, S. Z., Li, X. L., & Jin, T. H. (1995). Green-tea consumption and risk of stomach cancer: a population-based case-control study in Shanghai, China. Cancer Causes & Control : CCC, 6(6), 532-8.
Yu GP, et al. Green-tea Consumption and Risk of Stomach Cancer: a Population-based Case-control Study in Shanghai, China. Cancer Causes Control. 1995;6(6):532-8. PubMed PMID: 8580302.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Green-tea consumption and risk of stomach cancer: a population-based case-control study in Shanghai, China. AU - Yu,G P, AU - Hsieh,C C, AU - Wang,L Y, AU - Yu,S Z, AU - Li,X L, AU - Jin,T H, PY - 1995/11/1/pubmed PY - 1995/11/1/medline PY - 1995/11/1/entrez SP - 532 EP - 8 JF - Cancer causes & control : CCC JO - Cancer Causes Control VL - 6 IS - 6 N2 - The effect of drinking Chinese green tea on the risk of stomach cancer was evaluated in a population-based case-control study conducted in Shanghai, China, from October 1991 to December 1993. Eligible cases were incident cases of primary stomach cancer diagnosed during the study period among residents of Hongkou district and Nanhui county aged under 80 years. Controls were selected from the same street or commune where the case resided and were matched to the cases on age (within three years) and gender. A total of 711 cases and 711 matched controls, more than 90 percent of the eligible subjects, completed the interview. Information was obtained on the types of tea used, age when habitual tea drinking started, frequency of new batches of tea leaves used per day, number of cups brewed from each batch, total duration of drinking for each batch, strength and temperature of the tea consumed. Statistical analysis was based on modelling through conditional logistic regression. After adjusting for age, gender, place of residence, education, birthplace, alcohol consumption, and cigarette smoking, the odds ratio (OR) comparing drinkers of green tea with nondrinkers was 0.71 (95 percent confidence interval = 0.54-0.93). The adjusted OR decreased with increasing number of new batches of the green tea consumed each day (P value trend = 0.006). With the largest series of stomach cancer cases to date, this study found green-tea consumption associated with lower risk of stomach cancer. Among drinkers of green tea, the risk of stomach cancer did not depend on the age when habitual green-tea drinking started. Green tea may disrupt gastric carcinogenesis at both the intermediate and the late stages. SN - 0957-5243 UR - https://www.unboundmedicine.com/medline/citation/8580302/Green_tea_consumption_and_risk_of_stomach_cancer:_a_population_based_case_control_study_in_Shanghai_China_ DB - PRIME DP - Unbound Medicine ER -