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DOI: https://doi.org/10.4235/agmr.24.0080    [Accepted]
Published online July 18, 2024.
Association of Combined Low Physical Activity and Low Dietary Diversity with Mild Cognitive Impairment among Community-Dwelling Japanese Older Adults
Yuto Kiuchi1,2, Hyuma Makizako3, Mika Kimura4, Yuki Nakai5, Yoshiaki Taniguchi6, Shoma Akaida1,3, Mana Tateishi3, Takuro Kubozono7, Toshihiro Takenaka8, Hiroyuki Shimada1, Mitsuru Ohishi7
1Graduate School of Health Sciences Kagoshima University, Kagoshima, Japan
2Department of Preventive Gerontology, Center for Gerontology and Social Science, Research Institute, National Center for Geriatrics and Gerontology, Obu, Japan
3Department of Physical Therapy, School of Health Sciences, Faculty of Medicine, Kagoshima University, Kagoshima, Japan
4Center for Health Promotion, International Life Sciences Institute, Tokyo, Japan
5Department of Mechanical Systems Engineering, Faculty of Engineering, Daiichi Institute of Technology, Kagoshima, Japan
6Department of Rehabilitation Faculty of Nursing and Welfare, Kyushu University of Nursing and Social Welfare, Kumamoto, Japan
7Department of Cardiovascular Medicine and Hypertension, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
8Tarumizu Municipal Medical Center, Tarumizu Chuo Hospital, Kagoshima, Japan
Correspondence:  Hyuma Makizako,
Email: makizako@health.nop.kagoshima-u.ac.jp
Received: 27 March 2024   • Revised: 29 June 2024   • Accepted: 8 July 2024
Abstract
Background
This study aimed to investigate the potential association between the combination of low physical activity and low dietary diversity with mild cognitive impairment (MCI) in older Japanese adults.
Methods
Data from 600 older adults (mean age, 74.1±6.4 years; women, 62.0%) were analyzed. We evaluated dietary variety based on the Food Frequency Score (FFS; maximum 30 points) by assessing the 1-week consumption frequencies of ten foods. An FFS of ≤16 indicated low dietary diversity. We assessed MCI using the National Center for Geriatrics and Gerontology Functional Assessment Tool. Physical activity levels was determined based on participant responses to two questions: “Do you engage in moderate levels of physical exercise or sports aimed at health?” and “Do you engage in low levels of physical exercise aimed at health?” Participants who responded “No” to both questions were classified as having low physical activity levels. We classified the participants into robust, low-dietary diversity, low-physical activity, and coexistence groups.
Results
The overall prevalence of MCI was 20.7%, with rates in the robust, low dietary diversity, low physical activity, and coexistence groups of 17.7%, 24.7%, 25.0%, and 41.9%, respectively. Multiple logistic regression analysis revealed that low dietary diversity and physical activity were associated with MCI in older adults (odds ratio=2.80, 95% confidence interval 1.22–6.28).
Conclusion
The results of the present study demonstrated the association of the co-occurrence of low dietary diversity and low physical activity with MCI. Older adults with both risk factors may require early detection, as well as physical activity and dietary interventions.
Key Words: Aging, Eating behavior, Cognitive function, Physical activity, Older adults


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