Quantitative Effects of Face-to-Face Dietary Guidance in Japan: A Scoping Review

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  • Ikeda Nayu
    Section of Population Health Metrics, International Center for Nutrition and Information, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition
  • Yoshita Katsushi
    Department of Food Science and Nutrition, Graduate School of Human Life Science and Nutrition, Osaka City University
  • Nishi Nobuo
    International Center for Nutrition and Information, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition

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  • 日本における対人の栄養指導の定量的効果に関するスコーピングレビュー
  • ニホン ニ オケル タイジン ノ エイヨウ シドウ ノ テイリョウテキ コウカ ニ カンスル スコーピングレビュー

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Abstract

<p>Objective: We reviewed published literature to assess the quantitative effects of face-to-face dietary guidance in Japan.</p><p>Methods: We searched CiNii Articles and PubMed for peer-reviewed journal articles published between January 2010 and December 2020 that analyzed longitudinal data to quantify the effects of dietary guidance for improving adults' lifestyles in Japan. We conducted a scoping review to extract information on research designs and findings.</p><p>Results: Our review included 15 articles (five in Japanese and 10 in English). The studies were conducted in local communities (four articles), workplaces (one article), and medical institutions (10 articles). The median number of participants was 108, and participants' main characteristics were diabetes and older age. There were four clinical trials (including three randomized controlled trials) and seven non-randomized inter-group comparative studies. In four articles, no alternative intervention was considered. The most common evaluation periods were 3 months and 6 months. Major evaluation indicators included body weight, dietary intake, blood tests, and quality of life. Fourteen articles reported dietary guidance was effective, and some articles showed the importance of providing dietary guidance more than once.</p><p>Conclusion: Various types of face-to-face dietary guidance are effective, but the potential for publication bias requires consideration. It is necessary to construct mechanisms and secure human resources for collaboration between research institutes and people involved in local communities and workplaces to accumulate data on the effect of dietary guidance for healthy adults based on random allocation in quantitative evaluation research.</p>

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