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Accepted manuscript

Associations of Dietary Inflammatory Index Scores with the Disability Status and Subjective Health of Older Adults Living in Non-Urban Municipalities in Nagasaki and Ishikawa Prefectures, Japan

Published online by Cambridge University Press:  31 March 2025

Momoka Masuda Open the ORCID record for Momoka Masuda [Opens in a new window] ,
Chiho Goto ,
Hideki Imai ,
Shihomi Sakurai ,
Mikie Hidaka ,
Haruna Ushimura ,
Rieko Nakao ,
Mayumi Ohnishi  and
Masahiro Umezaki
Momoka Masuda*
Affiliation:
Department of Human Ecology, School of International Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
Chiho Goto
Affiliation:
Department of Health and Nutrition, School of Health and Human Life, Nagoya Bunri University, 365 Maeda, Inazawa-cho, Inazawa-shi, Aichi, 492-8520, Japan
Hideki Imai
Affiliation:
Faculty of Nursing, Ishikawa Prefectural Nursing University, 1-1 Gakuendai, Kahoku-shi, Ishikawa, 929-1210, Japan
Shihomi Sakurai
Affiliation:
Faculty of Nursing, Ishikawa Prefectural Nursing University, 1-1 Gakuendai, Kahoku-shi, Ishikawa, 929-1210, Japan
Mikie Hidaka
Affiliation:
School of Nursing, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo, 160-8402, Japan
Haruna Ushimura
Affiliation:
Faculty of Nursing, Ishikawa Prefectural Nursing University, 1-1 Gakuendai, Kahoku-shi, Ishikawa, 929-1210, Japan
Rieko Nakao
Affiliation:
Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki, 852-8520, Japan
Mayumi Ohnishi
Affiliation:
Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki, 852-8520, Japan
Masahiro Umezaki
Affiliation:
Department of Human Ecology, School of International Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
*
Corresponding author: Momoka Masuda, Mailing address: Department of Human Ecology, School of International Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan, Email address: [email protected], Telephone number: 03-5841-3529, Fax number: 03-5841-3395
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Abstract

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Objective:

To examine associations of Dietary Inflammatory Index (DII) scores with disability and subjective health, which is prognostic of disability, in a large, systematically sampled population of older adults living in non-urban areas in Japan.

Design:

Cross-sectional. The Tokyo Metropolitan Institute of Gerontology Index of Competence (TMIG-IC) was used to assess disability. Both overall disability and disabilities in components of everyday competence (instrumental activities of daily living [IADLs], intellectual activities, and social participation) were examined. Participants who reported an inability to perform one or more activities were categorized as disabled. Subjective health was assessed based on the response to the following question: “In general, how do you feel about your own health?”

Setting:

Six non-urban municipalities in Japan that differ in terms of regional characteristics.

Participants:

Adults aged 65–74 years (n = 7930).

Results:

DII scores were positively associated with the odds of overall disability (odds ratio [OR] [95% confidence interval {CI}]) = 1.23 [1.19, 1.28]); disabilities in IADLs (OR [95% CI] = 1.10 [1.05, 1.15]); intellectual activities (OR [95% CI] = 1.28 [1.23, 1.33]); social participation [OR (95% CI] = 1.17 [1.13, 1.22)]; and poor subjective health (OR [95%CI] = 1.09 [1.05, 1.14]).

Conclusions:

Our results imply the importance of reducing dietary inflammation to prevent both disability and a decline in subjective health, a predictor of disability.

Keywords

Dietary Inflammatory IndexDisabilitySubjective healthOlder peopleJapan
Type
Short Communication
Information
Public Health Nutrition , Accepted manuscript , pp. 1 - 17
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of The Nutrition Society