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Tea consumption and the risk of biliary tract cancer: a systematic review and dose-response meta-analysis of observational studies.

Abstract

Recent studies have shown that tea consumption is associated with the reduced incidence of some types of cancer, possibly including biliary tract cancer. However, the epidemiological evidences for the association with risk of biliary tract cancer are contradictory. Thus, we performed meta-analysis of published observational studies to assess the association between tea consumption and risk of biliary tract cancer. Relevant studies were identified by searching PubMed, EMBASE, and ISI Web of Science published before October 2016. The Newcastle-Ottawa Scale was used to evaluate the quality of included studies, and publication bias was evaluated using funnel plots, and Begg's and Egger's tests. This meta-analysis includes eight studies comprising 18 independent reports. The incidence of biliary tract cancer reduced about 34% (significantly) for tea intake group in comparison with never intake group (summary odds ratio [OR] = 0.66; 95% confidence interval [CI] = 0.48-0.85). Additionally, an inverse relationship between tea intake and risk of biliary tract cancer was statistically significant in women (OR = 0.65; 95 % CI = 0.47-0.83), but not in men (OR = 0.86; 95% CI = 0.58-1.13). Dose- response analysis indicated that the risk of biliary tract cancer decreased by 4% with each additional cup of tea one day (relative risk [RR] = 0.96, 95% CI = 0.93-0.98, p = 0.001). In summary, tea intake is associated with decreased risk of biliary tract cancer, especially for women.

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  • Authors+Show Affiliations

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    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

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    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

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    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

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    Department of Interventional Radiology, The First Affiliated Hospital of China Medical University, Shenyang, China.

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    State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Science, University of Macau, Macau SAR, China.

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    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

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    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

    ,

    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

    Department of Liver Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.

    Source

    Oncotarget 8:24 2017 Jun 13 pg 39649-39657

    MeSH

    Biliary Tract Neoplasms
    Humans
    Observational Studies as Topic
    Prognosis
    Risk Factors
    Tea

    Pub Type(s)

    Journal Article
    Meta-Analysis
    Review
    Systematic Review

    Language

    eng

    PubMed ID

    28454105

    Citation

    Xiong, Jianping, et al. "Tea Consumption and the Risk of Biliary Tract Cancer: a Systematic Review and Dose-response Meta-analysis of Observational Studies." Oncotarget, vol. 8, no. 24, 2017, pp. 39649-39657.
    Xiong J, Lin J, Wang A, et al. Tea consumption and the risk of biliary tract cancer: a systematic review and dose-response meta-analysis of observational studies. Oncotarget. 2017;8(24):39649-39657.
    Xiong, J., Lin, J., Wang, A., Wang, Y., Zheng, Y., Sang, X., ... Zhao, H. (2017). Tea consumption and the risk of biliary tract cancer: a systematic review and dose-response meta-analysis of observational studies. Oncotarget, 8(24), pp. 39649-39657. doi:10.18632/oncotarget.16963.
    Xiong J, et al. Tea Consumption and the Risk of Biliary Tract Cancer: a Systematic Review and Dose-response Meta-analysis of Observational Studies. Oncotarget. 2017 Jun 13;8(24):39649-39657. PubMed PMID: 28454105.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Tea consumption and the risk of biliary tract cancer: a systematic review and dose-response meta-analysis of observational studies. AU - Xiong,Jianping, AU - Lin,Jianzhen, AU - Wang,Anqiang, AU - Wang,Yaqin, AU - Zheng,Ying, AU - Sang,Xinting, AU - Xu,Yiyao, AU - Lu,Xin, AU - Zhao,Haitao, PY - 2017/01/09/received PY - 2017/03/29/accepted PY - 2017/4/30/pubmed PY - 2018/5/25/medline PY - 2017/4/29/entrez KW - bile duct cancer KW - biliary tract cancer KW - cholangiocarcinoma KW - tea SP - 39649 EP - 39657 JF - Oncotarget JO - Oncotarget VL - 8 IS - 24 N2 - Recent studies have shown that tea consumption is associated with the reduced incidence of some types of cancer, possibly including biliary tract cancer. However, the epidemiological evidences for the association with risk of biliary tract cancer are contradictory. Thus, we performed meta-analysis of published observational studies to assess the association between tea consumption and risk of biliary tract cancer. Relevant studies were identified by searching PubMed, EMBASE, and ISI Web of Science published before October 2016. The Newcastle-Ottawa Scale was used to evaluate the quality of included studies, and publication bias was evaluated using funnel plots, and Begg's and Egger's tests. This meta-analysis includes eight studies comprising 18 independent reports. The incidence of biliary tract cancer reduced about 34% (significantly) for tea intake group in comparison with never intake group (summary odds ratio [OR] = 0.66; 95% confidence interval [CI] = 0.48-0.85). Additionally, an inverse relationship between tea intake and risk of biliary tract cancer was statistically significant in women (OR = 0.65; 95 % CI = 0.47-0.83), but not in men (OR = 0.86; 95% CI = 0.58-1.13). Dose- response analysis indicated that the risk of biliary tract cancer decreased by 4% with each additional cup of tea one day (relative risk [RR] = 0.96, 95% CI = 0.93-0.98, p = 0.001). In summary, tea intake is associated with decreased risk of biliary tract cancer, especially for women. SN - 1949-2553 UR - https://www.unboundmedicine.com/medline/citation/28454105/Tea_consumption_and_the_risk_of_biliary_tract_cancer:_a_systematic_review_and_dose_response_meta_analysis_of_observational_studies_ L2 - http://www.impactjournals.com/oncotarget/misc/linkedout.php?pii=16963 DB - PRIME DP - Unbound Medicine ER -