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Abstract Title:

Green tea and liver cancer risk: A meta-analysis of prospective cohort studies in Asian populations.

Abstract Source:

Nutrition. 2015 Jul 2. Epub 2015 Jul 2. PMID: 26412579

Abstract Author(s):

Ya-Qing Huang, Xin Lu, Han Min, Qian-Qian Wu, Xiao-Ting Shi, Kang-Qi Bian, Xiao-Ping Zou

Article Affiliation:

Ya-Qing Huang

Abstract:

OBJECTIVES: The aim of this meta-analysis was to investigate whether an association existed between green tea consumption and the risk for liver cancer in prospective cohort studies in Asian populations.

METHODS: Relevant studies were identified by searching PubMed, EMBASE, ISI Web of Science, and the Chinese Bio-medicine Database published before April 2015. Study-specific risk estimates for the highest versus non- or lowest and increment of daily cup of green tea consumption levels were combined based on fixed- or random-effects models. STATA 11.0 (Stata Corporation, College Station, TX, USA) software was used for statistical analysis.

RESULTS: Nine prospective cohort articles involving 465,274 participants and 3694 cases of liver cancer from China, Japan, and Singapore were included. The summary relative risk (RR) indicated a significant association between the highest green tea consumption and reduced risk for liver cancer (summary RR, 0.88; 95% confidence interval [CI], 0.81-0.97). However, no statistically significant association was observed when analyzing daily consumption of one cup (summary RR, 0.97; 95% CI, 0.95-1.00). When stratified by sex, the protective effect of green tea consumption on risk for liver cancer was observed only in the group of women (summary RR, 0.78; 95% CI, 0.64-0.96), but not in men (summary RR, 0.89; 95% CI, 0.79-1.00).

CONCLUSIONS: The present analysis indicated the preventive effects of green tea intake on the risk for liver cancer in female Asian populations. However, additional studies are needed to make a convincing case for this association.

Study Type : Meta Analysis

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