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  • Title: [Food diversity and its relationship with nutrient intakes and meal days involving staple foods, main dishes, and side dishes in community-dwelling elderly adults].
    Author: Narita M, Kitamura A, Takemi Y, Yokoyama Y, Morita A, Shinkai S.
    Journal: Nihon Koshu Eisei Zasshi; 2020; 67(3):171-182. PubMed ID: 32238753.
    Abstract:
    Objectives　One of the diversity indicators of food intake in the elderly Japanese population is the Dietary Variety Score (DVS). Studies on elderly people have reported the relationship of food intake with health outcomes, such as body function, higher-level functional capacity, fall risk, and sarcopenia. However, the index have not been studied enough whether it is suggestive of nutrients and the characteristics of the meal by various food intakes. The purpose of this study was to clarify the DVS and its relationship with nutrient intakes and meal days consisting of staple foods, main dishes, and side dishes among elderly adults.Methods　The participants were 182 community-dwelling elderly adults (65-84 years) in Itabashi city, Tokyo. For the food diversity indicator, we used the DVS developed by Kumagai et al. and classified the patients as follows: the low score group (0-3 points), the medium score group (4-6 points), and the high score group (7-10 points). Dietary intakes were assessed using a 3-day dietary record. The daily amounts from foods and nutrients, and days of balanced diet with staple foods, main dishes, and side dishes greater than twice a day (hereafter "balanced meal days") were calculated. The relationships between the DVS classification and each dietary index were evaluated by the general linear model adjusted for sex, age, and energy levels. Additionally, we calculated the percentage of people with intakes below the estimated average requirement (EAR) of each nutrient and estimated the risk of below the EAR in the groups by multiple logistic regression analysis.Results　The low DVS group had significantly fewer balanced meal days (low 1.4 [1.2-1.6] days, medium 1.8 [1.6-1.9] days, high 1.9 [1.7-2.1] days, p for trend=0.001) than the high DVS group. The low DVS group showed significantly low energy ratios of protein and fat, as well as lower intakes of protein, dietary fiber, phosphorus, magnesium, potassium, vitamin K, and vitamin B12. In contrast, the low DVS group showed significantly higher energy ratios of carbohydrates and grains and higher carbohydrate intake. Compared to the high DVS group, the odds ratio for inadequate vitamin C intake (below the EAR) was significantly high in the low DVS group, and the odds ratios for inadequate intakes of magnesium, zinc, and vitamin B6 were significantly high in the middle DVS group.Conclusion　The high DVS group had significant associations with increased intake of protein and micronutrients, as well as balanced meal days. DVS can be a dietary indicator that leads to the intake of a desirable variety of food and nutrients in old age.
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