@article{ref1,
title="Tea consumption and the risk of depression: a meta-analysis of observational studies",
journal="Australian and New Zealand journal of psychiatry",
year="2015",
author="Dong, Xiaoxin and Yang, Chen and Cao, Shiyi and Gan, Yong and Sun, Huilian and Gong, Yanhong and Yang, Huajie and Yin, Xiaoxu and Lu, Zuxun",
volume="49",
number="4",
pages="334-345",
abstract="OBJECTIVE: Whether tea consumption decreases the risk of depression remains controversial. We performed a meta-analysis of findings from observational studies to evaluate the association between tea consumption and depression risk. <br><br>METHOD: Embase, PubMed, and Chinese National Knowledge Infrastructure databases were searched from their inception through August 2014 for observational studies that had reported the association between tea consumption and depression risk. We used a fixed effects model when heterogeneity was negligible and a random effect model when heterogeneity was significant to calculate the summary relative risk estimates (RRs) and 95% confidence intervals (CIs). <br><br>RESULTS: Eleven studies with 13 reports were eligible for inclusion in the meta-analysis (22,817 participants with 4,743 cases of depression). Compared to individuals with lower tea consumption, those with higher tea consumption had a pooled RR of depression risk at 0.69 (95% CI: 0.63-0.75). Eight reports were included in the dose-response analysis of tea consumption and depression risk (10,600 participants with 2,107 cases). There was a linear association between tea consumption and the risk of depression, with an increment of 3 cups/day in tea consumption associated with a decrease in the risk of depression of 37% (RR = 0.63, 95% CI: 0.55-0.71). <br><br>CONCLUSION: Tea consumption is associated with a decreased risk of depression.<p /> <p>Language: en</p>",
language="en",
issn="0004-8674",
doi="10.1177/0004867414567759",
url="http://dx.doi.org/10.1177/0004867414567759"
}