Green Tea and Stomach Cancer -- A Short Review of Prospective Studies

Yoshiharu Hoshiyama; Takeshi Kawaguchi; Yoshihiko Miura; Tetsuya Mizoue; Noritaka Tokui; Hiroshi Yatsuya; Kiyomi Sakata; Takaaki Kondo; Shogo Kikuchi; Hideaki Toyoshima; Norihiko Hayakawa; Akiko Tamakoshi; Takesumi Yoshimura

doi:10.2188/jea.15.S109

The Japan Collaborative Cohort Study (JACC Study) for Evaluation of Canner Risk sponsored by the Ministry of Education, Science, Sports and Culture of Japan (Monbusho): Report of Selected Results by Site

Green Tea and Stomach Cancer -- A Short Review of Prospective Studies

Yoshiharu Hoshiyama, Takeshi Kawaguchi, Yoshihiko Miura, Tetsuya Mizoue, Noritaka Tokui, Hiroshi Yatsuya, Kiyomi Sakata, Takaaki Kondo, Shogo Kikuchi, Hideaki Toyoshima, Norihiko Hayakawa, Akiko Tamakoshi, Takesumi Yoshimura

Author information

Yoshiharu Hoshiyama
Department of Public Health, Showa University School of Medicine.
Takeshi Kawaguchi
Department of Public Health, Showa University School of Medicine.
Yoshihiko Miura
Department of Nursing, Saitama University Saitama.
Tetsuya Mizoue
Department of Preventive Medicine, Kyushu University Graduate School of Medical Sciences.
Noritaka Tokui
Department of Preventive Medicine, Kyushu University Graduate School of Medical Sciences.
Hiroshi Yatsuya
Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Program in Health and Community Medicine, Nagoya University Graduate School of Medicine.
Kiyomi Sakata
Department of Public Health, Wakayama Medical University.
Takaaki Kondo
Department of Medical Technology, Nagoya University School of Health Sciences.
Shogo Kikuchi
Department of Public Health, Aichi Medical University.
Hideaki Toyoshima
Department of Public Health/ Health Information Dynamics, Field of Social Life Science, Program in Health and Community Medicine, Nagoya University Graduate School of Medicine.
Norihiko Hayakawa
Department of Epidemiology, Research Institute for Radiation Biology and Medicine, Hiroshima University.
Akiko Tamakoshi
Department of Preventive Medicine/ Biostatistics and Medical Decision Making, Nagoya University Graduate School of Medicine.
Takesumi Yoshimura
Department of Preventive Medicine, Kyushu University Graduate School of Medical Sciences.
Fukuoka Institute of Health and Environmental Sciences.

Keywords: Tea, Stomach Neoplasms, the JACC study, Case-Control Studies, Prospective Studies

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2005 Volume 15 Issue Supplement_II Pages S109-S112

DOI https://doi.org/10.2188/jea.15.S109

Details

Abstract

BACKGROUND: In Japan, green tea has been drunk for a long time. Because it can be drunk casually, many people love drinking it. If such green tea has an effect to prevent stomach cancer, it will be a very convenient way to prevent the disease.
METHODS: To examine the association between green tea consumption and the risk of stomach cancer, past epidemiologic studies including JACC Study were reviewed.
RESULTS: Among eight case-control studies, five showed risk reduction with a statistically significant difference, and two studies showed risk reduction without a statistically significant difference. The remaining study showed the opposite result. Among six prospective studies regarding stomach cancer, no study showed risk reduction with a statistically significant difference. Four of the six studies showed no relation. In terms of study design, prospective studies, which are considered to be more reliable than case-controlled studies, tend to show no risk reduction. The results of case-control studies and prospective studies present considerably different impressions.
CONCLUSIONS: Prospective studies showed no inverse association between the consumption of green tea and the risk of stomach cancer.
J Epidemiol 2005; 15: S109-S112.

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