Green tea consumption and the risk of incident functional disability in elderly Japanese: The Ohsaki Cohort 2006 Study

Yasutake Tomata, Masako Kakizaki, Naoki Nakaya, Toru Tsuboya, Toshimasa Sone, Shinichi Kuriyama, Atsushi Hozawa, Ichiro Tsuji

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Background: Previous studies have reported that green tea consumption is associated with a lower risk of diseases that cause functional disability, such as stroke, cognitive impairment, and osteoporosis. Although it is expected that green tea consumption would lower the risk of incident functional disability, this has never been investigated directly. Objective: The objective was to determine the association between green tea consumption and incident functional disability in elderly individuals. Design: We conducted a prospective cohort study in 13,988 Japanese individuals aged ≥65 y. Information on daily green tea consumption and other lifestyle factors was collected via questionnaire in 2006. Data on functional disability were retrieved from the public Longterm Care Insurance database, in which subjects were followed up for 3 y. We used Cox proportional hazards regression analysis to investigate the association between green tea consumption and functional disability. Results: The 3-y incidence of functional disability was 9.4% (1316 cases). The multiple-adjusted HR (95% CI) of incident functional disability was 0.90 (0.77, 1.06) among respondents who consumed 1-2 cups green tea/d, 0.75 (0.64, 0.88) for those who consumed 3-4 cups/d, and 0.67 (0.57, 0.79) for those who consumed ≥5 cups/d in comparison with those who consumed <1 cup/d (P-trend < 0.001). Conclusion: Green tea consumption is significantly associated with a lower risk of incident functional disability, even after adjustment for possible confounding factors.

Original languageEnglish
Pages (from-to)732-739
Number of pages8
JournalAmerican Journal of Clinical Nutrition
Volume95
Issue number3
DOIs
Publication statusPublished - 01-03-2012

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Tea
Cohort Studies
Insurance
Osteoporosis
Life Style
Stroke
Regression Analysis
Databases
Prospective Studies
Incidence

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

Cite this

Tomata, Yasutake ; Kakizaki, Masako ; Nakaya, Naoki ; Tsuboya, Toru ; Sone, Toshimasa ; Kuriyama, Shinichi ; Hozawa, Atsushi ; Tsuji, Ichiro. / Green tea consumption and the risk of incident functional disability in elderly Japanese : The Ohsaki Cohort 2006 Study. In: American Journal of Clinical Nutrition. 2012 ; Vol. 95, No. 3. pp. 732-739.
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abstract = "Background: Previous studies have reported that green tea consumption is associated with a lower risk of diseases that cause functional disability, such as stroke, cognitive impairment, and osteoporosis. Although it is expected that green tea consumption would lower the risk of incident functional disability, this has never been investigated directly. Objective: The objective was to determine the association between green tea consumption and incident functional disability in elderly individuals. Design: We conducted a prospective cohort study in 13,988 Japanese individuals aged ≥65 y. Information on daily green tea consumption and other lifestyle factors was collected via questionnaire in 2006. Data on functional disability were retrieved from the public Longterm Care Insurance database, in which subjects were followed up for 3 y. We used Cox proportional hazards regression analysis to investigate the association between green tea consumption and functional disability. Results: The 3-y incidence of functional disability was 9.4{\%} (1316 cases). The multiple-adjusted HR (95{\%} CI) of incident functional disability was 0.90 (0.77, 1.06) among respondents who consumed 1-2 cups green tea/d, 0.75 (0.64, 0.88) for those who consumed 3-4 cups/d, and 0.67 (0.57, 0.79) for those who consumed ≥5 cups/d in comparison with those who consumed <1 cup/d (P-trend < 0.001). Conclusion: Green tea consumption is significantly associated with a lower risk of incident functional disability, even after adjustment for possible confounding factors.",
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Green tea consumption and the risk of incident functional disability in elderly Japanese : The Ohsaki Cohort 2006 Study. / Tomata, Yasutake; Kakizaki, Masako; Nakaya, Naoki; Tsuboya, Toru; Sone, Toshimasa; Kuriyama, Shinichi; Hozawa, Atsushi; Tsuji, Ichiro.

In: American Journal of Clinical Nutrition, Vol. 95, No. 3, 01.03.2012, p. 732-739.

Research output: Contribution to journalArticle

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T2 - The Ohsaki Cohort 2006 Study

AU - Tomata, Yasutake

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AU - Tsuboya, Toru

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AU - Hozawa, Atsushi

AU - Tsuji, Ichiro

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