Green tea consumption is associated with lower psychological distress in a general population: The Ohsaki Cohort 2006 Study

Atsushi Hozawa, Shinichi Kuriyama, Naoki Nakaya, Kaori Ohmori-Matsuda, Masako Kakizaki, Toshimasa Sone, Masato Nagai, Yumi Sugawara, Akemi Nitta, Yasutake Tomata, Kaijun Niu, Ichiro Tsuji

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Background: Although green tea or its constituents might reduce psychological stress, the relation between green tea consumption and psychological distress has not been investigated in a large-scale study. Objective: Our aim was to clarify whether green tea consumption is associated with lower psychological distress. Design: We analyzed cross-sectional data for 42,093 Japanese individuals aged ≥40 y from the general population. Information on daily green tea consumption, psychological distress as assessed by the Kessler 6-item psychological distress scale, and other lifestyle factors was collected by using a questionnaire. We used multiple logistic regression analyses adjusted for age, sex, history of disease, body mass index, cigarette smoking, alcohol consumption, time spent walking, dietary factors, social support, and participation in community activities to investigate the relation between green tea consumption and psychological distress. Results: We classified 2774 (6.6%) of the respondents as having psychological distress (Kessler 6-item psychological distress scale ≥13/24). There was an inverse association between green tea consumption and psychological distress in a model adjusted for age and sex. Although the relation was largely attenuated when possible confounding factors were adjusted for, a statistically significant inverse association remained. The odds ratio (with 95% CI) of developing psychological distress among respondents who consumed ≥5 cups of green tea/d was 0.80 (0.70, 0.91) compared with those who consumed <1 cup/d. These relations persisted when respondents were stratified by social support subgroups or by activities in communities. Conclusion: Green tea consumption was inversely associated with psychological distress even after adjustment for possible confounding factors.

Original languageEnglish
Pages (from-to)1390-1396
Number of pages7
JournalAmerican Journal of Clinical Nutrition
Volume90
Issue number5
DOIs
Publication statusPublished - 01-11-2009

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Tea
Cohort Studies
Psychology
Population
Social Support
Social Participation
Psychological Stress
Alcohol Drinking
Walking
Life Style
Body Mass Index
Logistic Models
Smoking
Odds Ratio
Regression Analysis
Surveys and Questionnaires

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

Cite this

Hozawa, Atsushi ; Kuriyama, Shinichi ; Nakaya, Naoki ; Ohmori-Matsuda, Kaori ; Kakizaki, Masako ; Sone, Toshimasa ; Nagai, Masato ; Sugawara, Yumi ; Nitta, Akemi ; Tomata, Yasutake ; Niu, Kaijun ; Tsuji, Ichiro. / Green tea consumption is associated with lower psychological distress in a general population : The Ohsaki Cohort 2006 Study. In: American Journal of Clinical Nutrition. 2009 ; Vol. 90, No. 5. pp. 1390-1396.
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abstract = "Background: Although green tea or its constituents might reduce psychological stress, the relation between green tea consumption and psychological distress has not been investigated in a large-scale study. Objective: Our aim was to clarify whether green tea consumption is associated with lower psychological distress. Design: We analyzed cross-sectional data for 42,093 Japanese individuals aged ≥40 y from the general population. Information on daily green tea consumption, psychological distress as assessed by the Kessler 6-item psychological distress scale, and other lifestyle factors was collected by using a questionnaire. We used multiple logistic regression analyses adjusted for age, sex, history of disease, body mass index, cigarette smoking, alcohol consumption, time spent walking, dietary factors, social support, and participation in community activities to investigate the relation between green tea consumption and psychological distress. Results: We classified 2774 (6.6{\%}) of the respondents as having psychological distress (Kessler 6-item psychological distress scale ≥13/24). There was an inverse association between green tea consumption and psychological distress in a model adjusted for age and sex. Although the relation was largely attenuated when possible confounding factors were adjusted for, a statistically significant inverse association remained. The odds ratio (with 95{\%} CI) of developing psychological distress among respondents who consumed ≥5 cups of green tea/d was 0.80 (0.70, 0.91) compared with those who consumed <1 cup/d. These relations persisted when respondents were stratified by social support subgroups or by activities in communities. Conclusion: Green tea consumption was inversely associated with psychological distress even after adjustment for possible confounding factors.",
author = "Atsushi Hozawa and Shinichi Kuriyama and Naoki Nakaya and Kaori Ohmori-Matsuda and Masako Kakizaki and Toshimasa Sone and Masato Nagai and Yumi Sugawara and Akemi Nitta and Yasutake Tomata and Kaijun Niu and Ichiro Tsuji",
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Hozawa, A, Kuriyama, S, Nakaya, N, Ohmori-Matsuda, K, Kakizaki, M, Sone, T, Nagai, M, Sugawara, Y, Nitta, A, Tomata, Y, Niu, K & Tsuji, I 2009, 'Green tea consumption is associated with lower psychological distress in a general population: The Ohsaki Cohort 2006 Study', American Journal of Clinical Nutrition, vol. 90, no. 5, pp. 1390-1396. https://doi.org/10.3945/ajcn.2009.28214

Green tea consumption is associated with lower psychological distress in a general population : The Ohsaki Cohort 2006 Study. / Hozawa, Atsushi; Kuriyama, Shinichi; Nakaya, Naoki; Ohmori-Matsuda, Kaori; Kakizaki, Masako; Sone, Toshimasa; Nagai, Masato; Sugawara, Yumi; Nitta, Akemi; Tomata, Yasutake; Niu, Kaijun; Tsuji, Ichiro.

In: American Journal of Clinical Nutrition, Vol. 90, No. 5, 01.11.2009, p. 1390-1396.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Green tea consumption is associated with lower psychological distress in a general population

T2 - The Ohsaki Cohort 2006 Study

AU - Hozawa, Atsushi

AU - Kuriyama, Shinichi

AU - Nakaya, Naoki

AU - Ohmori-Matsuda, Kaori

AU - Kakizaki, Masako

AU - Sone, Toshimasa

AU - Nagai, Masato

AU - Sugawara, Yumi

AU - Nitta, Akemi

AU - Tomata, Yasutake

AU - Niu, Kaijun

AU - Tsuji, Ichiro

PY - 2009/11/1

Y1 - 2009/11/1

N2 - Background: Although green tea or its constituents might reduce psychological stress, the relation between green tea consumption and psychological distress has not been investigated in a large-scale study. Objective: Our aim was to clarify whether green tea consumption is associated with lower psychological distress. Design: We analyzed cross-sectional data for 42,093 Japanese individuals aged ≥40 y from the general population. Information on daily green tea consumption, psychological distress as assessed by the Kessler 6-item psychological distress scale, and other lifestyle factors was collected by using a questionnaire. We used multiple logistic regression analyses adjusted for age, sex, history of disease, body mass index, cigarette smoking, alcohol consumption, time spent walking, dietary factors, social support, and participation in community activities to investigate the relation between green tea consumption and psychological distress. Results: We classified 2774 (6.6%) of the respondents as having psychological distress (Kessler 6-item psychological distress scale ≥13/24). There was an inverse association between green tea consumption and psychological distress in a model adjusted for age and sex. Although the relation was largely attenuated when possible confounding factors were adjusted for, a statistically significant inverse association remained. The odds ratio (with 95% CI) of developing psychological distress among respondents who consumed ≥5 cups of green tea/d was 0.80 (0.70, 0.91) compared with those who consumed <1 cup/d. These relations persisted when respondents were stratified by social support subgroups or by activities in communities. Conclusion: Green tea consumption was inversely associated with psychological distress even after adjustment for possible confounding factors.

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