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Int J Clin Exp Med. 2015 Aug 15;8(8):14345-51. eCollection 2015.

Association of tea consumption and the risk of thyroid cancer: a meta-analysis.

Author information

1
Department of General Surgery, Zhangqiu People's Hospital Ji'nan, Shandong, 250200, P.R. China.
2
Department of Obstetrics and Gynecology, Zhangqiu People's Hospital Ji'nan, Shandong, 250200, P.R. China.
3
Department of Orthopedics, Zhangqiu People's Hospital Ji'nan, Shandong, 250200, P.R. China.

Abstract

OBJECTIVES:

Epidemiological studies evaluating the association of tea consumption and the risk of thyroid cancer risk have produced inconsistent results. Thus, we conducted a meta-analysis to assess the relationship between tea consumption and thyroid cancer risk.

METHODS:

Pertinent studies were identified by a search in PubMed and Web of Knowledge. The random effect model was used based to combine the results. Publication bias was estimated using Egger's regression asymmetry test.

RESULTS:

Finally, 11 articles with 14 studies (2 cohort studies and 12 case-control studies) involving 2,955 thyroid cancer cases and 106,447 participants were included in this meta-analysis. The relative risk (95% confidence interval) of thyroid cancer for the highest versus the lowest category of tea consumption was 0.774 (95% CI = 0.619-0.967), and the associations were also significant in Europe and America, but not in the Asia. No publication bias was found.

CONCLUSIONS:

Our analysis indicated that higher tea consumption may have a protective effect on thyroid cancer, especially in Europe and America.

KEYWORDS:

Tea consumption; meta-analysis; thyroid cancer

PMID:
26550420
PMCID:
PMC4613105

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