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Archives of Gynecology and Obstetrics

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01-01-2016 | Gynecologic Oncology

Green tea, black tea consumption and risk of endometrial cancer: a systematic review and meta-analysis

Authors: Quan Zhou, Hui Li, Jian-Guo Zhou, Yuan Ma, Tao Wu, Hu Ma

Published in: Archives of Gynecology and Obstetrics | Issue 1/2016

Abstract

Background

Several studies have assessed the association between green and black tea consumption and the risk of endometrial cancer (EC) and have yielded inconsistent results.

Objective

The purpose of this meta-analysis is to systematically analyze the effect of green tea and black tea on EC risk.

Methods

PubMed, Embase, Cochrane Library and China Biological Medicine Database were searched through February 2, 2015 to identify studies that met pre-stated inclusion criteria. Overall relative risk (RR) was estimated based on the highest and lowest levels of green/black tea consumption. Dose–response relationships were evaluated with the data from categories of green/black tea intake in each study.

Results

For green tea, the summary RR indicated that the highest green tea consumption was associated with a reduced risk of EC (RR 0.78, 95 % CI 0.66–0.92). Furthermore, an increase in green tea consumption of one cup per day was associated with an 11 % decreased risk of developing EC. (RR 0.89, 95 % CI 0.84–0.94). For black tea, no statistically significant association was observed in the meta-analysis (highest versus non/lowest, RR 0.99, 95 % CI 0.79–1.23; increment of one cup/day, RR 0.99, 95 % CI 0.94–1.03). The power of the estimate of green tea and black tea with risk of EC was 84.33 and 5.07 %, respectively. The quality of evidence for the association between green and black tea with EC risk was moderate and very low, respectively.

Conclusions

The results from this meta-analysis indicate that green tea, but not black tea, may be related to a reduction of EC risk. Large population-based randomized controlled trials and large prospective cohort studies are required to obtain a definitive conclusion and determine the mechanisms underlying this association.

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Title: Green tea, black tea consumption and risk of endometrial cancer: a systematic review and meta-analysis
Authors: Quan Zhou
Hui Li
Jian-Guo Zhou
Yuan Ma
Tao Wu
Hu Ma
Publication date: 01-01-2016
Publisher: Springer Berlin Heidelberg
Published in: Archives of Gynecology and Obstetrics / Issue 1/2016
Print ISSN: 0932-0067
Electronic ISSN: 1432-0711
DOI: https://doi.org/10.1007/s00404-015-3811-1

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Green tea, black tea consumption and risk of endometrial cancer: a systematic review and meta-analysis

Abstract

Background

Objective

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Objective

Methods

Results

Conclusions

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