Green Tea Consumption and Mortality among Japanese Elderly People: The Prospective Shizuoka Elderly Cohort

Etsuji Suzuki, Takashi Yorifuji, Soshi Takao, Hirokazu Komatsu, Masumi Sugiyama, Toshiki Ohta, Kazuko Ishikawa-Takata, Hiroyuki Doi

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Abstract

Purpose: To investigate the association between green tea consumption and mortality from all causes, cancer, and cardiovascular disease (CVD) among elderly people. Methods: In a population-based, prospective cohort study, a total of 14,001 elderly residents (aged 65-84 years), randomly chosen from all 74 municipalities in Shizuoka, Japan, completed questionnaires that included items about frequency of green tea consumption. They were followed for up to 6 years, from December 1999 to March 2006. Consequently, 12,251 subjects were analyzed to estimate the hazard ratios (HRs) for all-cause mortality, cancer, and CVD. Results: Among 64,002 person-years, 1,224 deaths were identified (follow-up rate, 71.6%). The multivariate HRs and 95% confidence intervals (CIs) for CVD mortality compared those who consumed seven or more cups per day with those who consumed less than one cup per day, were 0.24 (0.14-0.40), 0.30 (0.15-0.61), and 0.18 (0.08-0.40) for total participants, men, and women, respectively. Although green tea consumption was not inversely associated with cancer mortality, green tea consumption and colorectal cancer mortality were inversely associated with a moderate dose-response relationship. Conclusions: Green tea consumption is associated with reduced mortality from all causes and CVD. This study also suggests that green tea could have protective effects against colorectal cancer.

Original languageEnglish
Pages (from-to)732-739
Number of pages8
JournalAnnals of Epidemiology
Volume19
Issue number10
DOIs
Publication statusPublished - Oct 2009

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Tea
Mortality
Cardiovascular Diseases
Colorectal Neoplasms
Neoplasms
Japan
Cohort Studies
Prospective Studies
Confidence Intervals
Population

Keywords

  • Aged
  • Cohort Studies
  • Japan
  • Prospective Studies
  • Tea

ASJC Scopus subject areas

  • Epidemiology

Cite this

Green Tea Consumption and Mortality among Japanese Elderly People : The Prospective Shizuoka Elderly Cohort. / Suzuki, Etsuji; Yorifuji, Takashi; Takao, Soshi; Komatsu, Hirokazu; Sugiyama, Masumi; Ohta, Toshiki; Ishikawa-Takata, Kazuko; Doi, Hiroyuki.

In: Annals of Epidemiology, Vol. 19, No. 10, 10.2009, p. 732-739.

Research output: Contribution to journalArticle

Suzuki, Etsuji ; Yorifuji, Takashi ; Takao, Soshi ; Komatsu, Hirokazu ; Sugiyama, Masumi ; Ohta, Toshiki ; Ishikawa-Takata, Kazuko ; Doi, Hiroyuki. / Green Tea Consumption and Mortality among Japanese Elderly People : The Prospective Shizuoka Elderly Cohort. In: Annals of Epidemiology. 2009 ; Vol. 19, No. 10. pp. 732-739.
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