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A prospective study of green tea consumption and oral cancer incidence in Japan.
Ann Epidemiol. 2007 Oct; 17(10):821-6.AE

Abstract

PURPOSE

To examine the relation of green tea consumption with oral carcinogenesis, we prospectively analyzed data from a nationwide large-scale cohort study in Japan.

METHODS

A total of 20,550 men and 29,671 women aged 40-79 years, without any history of oral and pharyngeal cancer at baseline survey, were included in the present study. During a mean follow-up period of 10.3 years, 37 oral cancer cases were identified. The Cox proportional hazard model was used to estimate the hazard ratio (HR) and 95% confidence interval (95% CI) for oral cancer according to green tea consumption by sex, while adjusting for age, smoking, alcohol drinking, and other dietary factors.

RESULTS

For women, the HRs of oral cancer for green tea consumption of 1-2, 3-4, and 5 or more cups per day were 0.51 (95% CI: 0.10-2.68), 0.60 (95% CI: 0.17-2.10), and 0.31 (95% CI: 0.09-1.07), respectively, compared with those who drank less than one cup per day (p for trend, 0.08). For men, no such trends were observed.

CONCLUSIONS

Our findings did not suggest a prominent inverse association of green tea consumption with oral cancer, although there was a tendency for a reduced risk in women.

Authors+Show Affiliations

Department of Clinical Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyusyu, Japan. r-ochide@med.uoeh-u.ac.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17606381

Citation

Ide, Reiko, et al. "A Prospective Study of Green Tea Consumption and Oral Cancer Incidence in Japan." Annals of Epidemiology, vol. 17, no. 10, 2007, pp. 821-6.
Ide R, Fujino Y, Hoshiyama Y, et al. A prospective study of green tea consumption and oral cancer incidence in Japan. Ann Epidemiol. 2007;17(10):821-6.
Ide, R., Fujino, Y., Hoshiyama, Y., Mizoue, T., Kubo, T., Pham, T. M., Shirane, K., Tokui, N., Sakata, K., Tamakoshi, A., & Yoshimura, T. (2007). A prospective study of green tea consumption and oral cancer incidence in Japan. Annals of Epidemiology, 17(10), 821-6.
Ide R, et al. A Prospective Study of Green Tea Consumption and Oral Cancer Incidence in Japan. Ann Epidemiol. 2007;17(10):821-6. PubMed PMID: 17606381.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A prospective study of green tea consumption and oral cancer incidence in Japan. AU - Ide,Reiko, AU - Fujino,Yoshihisa, AU - Hoshiyama,Yoshiharu, AU - Mizoue,Tetsuya, AU - Kubo,Tatsuhiko, AU - Pham,Truong-Minh, AU - Shirane,Kiyoyumi, AU - Tokui,Noritaka, AU - Sakata,Kiyomi, AU - Tamakoshi,Akiko, AU - Yoshimura,Takesumi, AU - ,, Y1 - 2007/07/02/ PY - 2006/11/20/received PY - 2007/04/06/revised PY - 2007/04/20/accepted PY - 2007/7/4/pubmed PY - 2008/1/3/medline PY - 2007/7/4/entrez SP - 821 EP - 6 JF - Annals of epidemiology JO - Ann Epidemiol VL - 17 IS - 10 N2 - PURPOSE: To examine the relation of green tea consumption with oral carcinogenesis, we prospectively analyzed data from a nationwide large-scale cohort study in Japan. METHODS: A total of 20,550 men and 29,671 women aged 40-79 years, without any history of oral and pharyngeal cancer at baseline survey, were included in the present study. During a mean follow-up period of 10.3 years, 37 oral cancer cases were identified. The Cox proportional hazard model was used to estimate the hazard ratio (HR) and 95% confidence interval (95% CI) for oral cancer according to green tea consumption by sex, while adjusting for age, smoking, alcohol drinking, and other dietary factors. RESULTS: For women, the HRs of oral cancer for green tea consumption of 1-2, 3-4, and 5 or more cups per day were 0.51 (95% CI: 0.10-2.68), 0.60 (95% CI: 0.17-2.10), and 0.31 (95% CI: 0.09-1.07), respectively, compared with those who drank less than one cup per day (p for trend, 0.08). For men, no such trends were observed. CONCLUSIONS: Our findings did not suggest a prominent inverse association of green tea consumption with oral cancer, although there was a tendency for a reduced risk in women. SN - 1047-2797 UR - https://www.unboundmedicine.com/medline/citation/17606381/A_prospective_study_of_green_tea_consumption_and_oral_cancer_incidence_in_Japan_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1047-2797(07)00178-0 DB - PRIME DP - Unbound Medicine ER -