Citation

Dong X, Yang C, Cao S, Gan Y, Sun H, Gong Y, Yang H, Yin X, Lu Z. Aust. N. Zeal. J. Psychiatry 2015; 49(4): 334-345.

Affiliation

Department of Social Medicine and Health Management, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China zuxunlu@yahoo.com.

Copyright

(Copyright © 2015, Royal Australian and New Zealand College of Psychiatrists, Publisher SAGE Publishing)

DOI

10.1177/0004867414567759

PMID

25657295

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.

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).

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).

CONCLUSION: Tea consumption is associated with a decreased risk of depression.

Language: en