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Mediators of the effects of rice intake on health in individuals consuming a traditional Japanese diet centered on rice

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Title: Mediators of the effects of rice intake on health in individuals consuming a traditional Japanese diet centered on rice
Authors: Koga, Minori Browse this author
Toyomaki, Atsuhito Browse this author →KAKEN DB
Miyazaki, Akane Browse this author
Nakai, Yukiei Browse this author
Yamaguchi, Atsuko Browse this author
Kubo, Chizuru Browse this author
Suzuki, Junko Browse this author
Ohkubo, Iwao Browse this author →KAKEN DB
Shimizu, Mari Browse this author
Musashi, Manabu Browse this author
Kiso, Yoshinobu Browse this author
Kusumi, Ichiro Browse this author →KAKEN DB
Issue Date: 2-Oct-2017
Publisher: Public Library of Science
Journal Title: PLoS ONE
Volume: 12
Issue: 10
Start Page: e0185816
Publisher DOI: 10.1371/journal.pone.0185816
Abstract: Although the Japanese diet is believed to be balanced and healthy, its benefits have been poorly investigated, especially in terms of effects on mental health. We investigated dietary patterns and physical and mental health in the Japanese population using an epidemiological survey to determine the health benefits of the traditional Japanese diet. Questionnaires to assess dietary habits, quality of life, sleep quality, impulsivity, and depression severity were distributed to 550 randomly selected middle-aged and elderly individuals. Participants with any physical or mental disease were excluded. Two-hundred and seventy-eight participants were selected for the final statistical analysis. We determined rice to be one of the most traditional foods in Japanese cuisine. Scores for each questionnaire were computed, and the correlations between rice intake and health indices were assessed. When analyzing the direct correlations between rice intake and health indices, we found only two correlations, namely those with quality of life (vitality) and sleep quality. Path analysis using structural equation modeling was performed to investigate the association between rice intake and health, with indirect effects included in the model. Additional associations between rice intake and health were explained using this model when compared to those using direct correlation analysis. Path analysis was used to identify mediators of the rice-health association. These mediators were miso (soybean paste) soup, green tea, and natto (fermented soybean) intake. Interestingly, these mediators have been major components of the Japanese diet since 1975, which has been considered one of the healthiest diets since the 1960s. Our results indicate that the combination of rice with other healthy foods, which is representative of the traditional Japanese diet, may contribute to improvements in physical and mental health.
Type: article
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 久住 一郎

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