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Article

The Association between Habitual Green Tea Consumption and Comprehensive Frailty as Assessed by Kihon Checklist Indexes among an Older Japanese Population

1
National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo 162-8636, Japan
2
Institute for Active Health, Kyoto University of Advanced Science, Kyoto 621-8555, Japan
3
Physical Fitness Research Institute, Meiji Yasuda Life Foundation of Health and Welfare, Tokyo 192-0001, Japan
*
Author to whom correspondence should be addressed.
Kameoka Study Group are listed in acknowledgments.
Academic Editor: Matteo Tosato
Nutrients 2021, 13(11), 4149; https://doi.org/10.3390/nu13114149
Received: 22 October 2021 / Revised: 12 November 2021 / Accepted: 16 November 2021 / Published: 19 November 2021
Background: It is unclear whether habitual green tea consumption is related to comprehensive frailty. Objectives: We conducted this study to investigate this relationship among an elderly Japanese population. Methods: This was a cross-sectional study of baseline data from 2012. The study included 5668 Japanese participants (2766 men and 2902 women aged 65 years or older). The subjects completed a validated self-administered food frequency questionnaire that included questions on their green tea consumption. We evaluated comprehensive frailty using a 25-item Kihon Checklist (KCL), which comprised seven domains (instrumental activities of daily living (IADL), physical function, malnutrition, oral or eating function, socialization and housebound, cognitive function, and depression). Frailty was defined as a KCL score greater than or equal to seven. Results: We found that a higher consumption of green tea was associated with a lower prevalence of comprehensive frailty in both sexes. Further age-stratified analysis showed that a higher consumption of green tea among women was associated with a lower prevalence of comprehensive frailty, regardless of age. In men, however, this association was found only in the older age groups. An analysis of the association between green tea consumption and the frailty subdomains showed that green tea consumption was associated with a lower prevalence of oral dysfunction and cognitive problems in both sexes. In addition, only in women was higher green tea consumption found to be associated with a lower prevalence of IADL and mobility-related disability problems. Conclusions: Green tea consumption is inversely associated with the prevalence of comprehensive frailty in Japanese men and women. Longitudinal studies are required to confirm this association. View Full-Text
Keywords: green tea; comprehensive frailty; Kihon Checklist green tea; comprehensive frailty; Kihon Checklist
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MDPI and ACS Style

Nanri, H.; Yoshida, T.; Watanabe, Y.; Fujita, H.; Kimura, M.; Yamada, Y.; on behalf of the Kameoka Study Group. The Association between Habitual Green Tea Consumption and Comprehensive Frailty as Assessed by Kihon Checklist Indexes among an Older Japanese Population. Nutrients 2021, 13, 4149. https://doi.org/10.3390/nu13114149

AMA Style

Nanri H, Yoshida T, Watanabe Y, Fujita H, Kimura M, Yamada Y, on behalf of the Kameoka Study Group. The Association between Habitual Green Tea Consumption and Comprehensive Frailty as Assessed by Kihon Checklist Indexes among an Older Japanese Population. Nutrients. 2021; 13(11):4149. https://doi.org/10.3390/nu13114149

Chicago/Turabian Style

Nanri, Hinako, Tsukasa Yoshida, Yuya Watanabe, Hiroyuki Fujita, Misaka Kimura, Yosuke Yamada, and on behalf of the Kameoka Study Group. 2021. "The Association between Habitual Green Tea Consumption and Comprehensive Frailty as Assessed by Kihon Checklist Indexes among an Older Japanese Population" Nutrients 13, no. 11: 4149. https://doi.org/10.3390/nu13114149

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