• Yuto Kiuchi, Takehiko Doi, Kota Tsutsumimoto, Sho Nakakubo, Satoshi Kurita, Kazuhei Nishimoto, Hyuma Makizako, and Hiroyuki Shimada.
• Department of Preventive Gerontology, Center for Gerontology and Social Science, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan; Department of Health Science, Graduate School of Health Sciences Kagoshima University, Sakuragaoka, Kagoshima, Japan. Electronic address: kiuchi-y@ncgg.go.jp.
• Nutrition. 2023 Feb 1; 106: 111896111896.

ObjectivesThe aim of this study was to examine whether dietary diversity is associated with sarcopenia in community-dwelling older Japanese adults.MethodsWe used a cross-sectional large cohort data set from the National Center for Geriatrics and Gerontology-Study of Geriatric Syndromes. Data from 9080 older adults (mean age 74 ± 5.6 y; 44.4% were men) were included in this cross-sectional study. Sarcopenia was assessed using muscle mass, muscle strength, and physical performance represented by gait speed. We assessed 1-wk consumption frequency of food types, including meat, fish/shellfish, eggs, milk, soybean products, green and yellow vegetables, potatoes, fruits, seaweeds, fats, and oil. Consumption frequency was allotted to each category for the following responses: eat almost every day, eat 3 or 4 /wkd, eat 1 or 2 d/wk, and hardly ever eat. Poor dietary diversity was defined as those who responded hardly ever eat for any of the 10 foods.ResultsThis study revealed that 2647 participants (29.2%) had poor dietary diversity. Poor dietary diversity was associated with confirmed sarcopenia (odds ratio [OR], 1.46; 95% confidence interval [CI], 1.08-1.96) and severe sarcopenia (OR, 1.58; 95% CI, 1.08-2.39). Furthermore, poor dietary diversity of low-protein foods was significantly associated with sarcopenia (OR, 1.57; 95% CI, 1.13-2.20) as well as poor dietary diversity of high-protein foods (OR, 1.47; 95% CI, 1.12-1.92).ConclusionsThis cross-sectional study revealed that poor dietary diversity was associated with sarcopenia among older adults. Ingestion of low-protein foods and high-protein foods is infrequently associated with sarcopenia and ingestion of high-protein foods.Copyright © 2022 Elsevier Inc. All rights reserved.

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