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REVIEW ARTICLE
Year : 2019  |  Volume : 6  |  Issue : 2  |  Page : 33-38

Effect of Coffee and Tea Consumption on Oral Cancer Risk: A Meta-Analysis


Department of Stomatology, Oral Medicine Unit, Faculty of Dentistry, University of Granada, Granada, Spain

Correspondence Address:
Alberto Rodriguez-Archilla
Department of Stomatology, Oral Medicine Unit, Faculty of Dentistry, University of Granada, Colegio Maximo, S/N, Campus de Cartuja, 18071-Granada
Spain
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jdrr.jdrr_28_19

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Background: Oral cancer is a global public health problem whose incidence and mortality have not considerably improved in recent decades. Its etiology is multifactorial with risk factors such as smoking, alcohol intake, human papillomavirus infection, or dietary factors. Objective: The objective is to assess the possible effect of coffee and/or tea consumption on oral cancer. Methods: A PubMed database search through December 2018 of articles on the effect of coffee or tea consumption on oral cancer using the following Medical Subject Headings terms (“coffee” or “tea”) and “mouth neoplasms” was conducted. One hundred and two articles were found between 1990 and 2017. From 79 studies with full-text availability, 61 were excluded for several reasons: studies on cancers that did not exclusively affect the oral cavity (29) and studies with non-usable data (32). Statistical Analysis: For dichotomous outcomes, the estimates of effects of an intervention were expressed as odds ratios (ORs) using Mantel-Haenszel method with a 95% confidence interval and, also the Pearson Chi-square test was applied when required. Results: Eighteen studies on the effect of coffee and/or tea consumption on oral cancer were included in this meta-analysis. High consumption of coffee (≥6 cups daily) had no relevant effect on oral cancer risk (OR: 1.01, I2 = 79%, P = 0.88). Tea intake (OR: 0.78, I2 = 79%, P <0.001) and consumption of ≥ 6 cups/day (OR: 0.79, I2 = 80%, P = 0.02) did have a significant protective effect on oral cancer. Conclusions: Only the consumption of tea had a protective effect on oral cancer.


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