Carcinogenesis, Teratogenesis & Mutagenesis ›› 2018, Vol. 30 ›› Issue (5): 395-399.doi: 10.3969/j.issn.1004-616x.2018.05.013

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Menopausal status on risk for breast cancer from tea consumption: a meta-analysis

XIAO Hongmei1,2, PAN Tianqi1, DONG Shunan1, FU Lingmeng1, WANG Shaokang1, SUN Guiju1   

  1. 1. Key Laboratory of Environmental Medicine and Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu;
    2. Yuebei People's Hospital, Shaoguan 512000, Guangdong, China
  • Received:2017-10-09 Revised:2018-06-08 Online:2018-09-30 Published:2018-09-30

Abstract: OBJECTIVE:To ascertain the potential relationship between tea consumption and risk of premenopausal and post-menopausal breast cancer. METHODS:Web of Science,PubMed,Medline,CNKI,VIP and WanFang database were independently searched from January 1st, 1996 to August 31st, 2017 by using "tea OR catechin OR tea polyphenol" AND "breast OR mammary" AND "cancer OR tumor OR carcinoma" as key words. The combination of the effect values and the heterogeneity test were performed using Stata 11.0 software. Each study was scored using the NOS (New Castle Ottawa Scale),and the publication bias was calculated using the funnel and Egger regression. RESULTS:A total of 9 studies (5 case-control studies;4 cohort studies) were included. The studies showed that tea intake was insignificantly associated with risk of breast cancer (OR=1.01,95% CI:0.86-1.18),the highest tea intake was also insignificant for risk of premenopausal (OR=0.92,95% CI:0.82-1.04) and postmenopausal breast cancers (OR=1.11,95% CI:0.93-1.33). In addition, we did not identify any statistically significant association between tea consumption and breast cancer risk in all the subgroup analyses (P < 0.05). CONCLUSION:In conclusion,our findings indicate that menopausal status had no effect on tea consumption and breast cancer risk. But the current evidence is still relatively limited. Therefore, large sample,multi-center cohort or case-control studies should be conducted to further clarify the accuracy of this conclusion.

Key words: tea, breast cancer, menopause, meta-analysis

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