Open Access, Peer-reviewed
eISSN 2951-3146
    Korean J Community Nutr. 2021 Feb;26(1):37-47. Korean.
    Published online Feb 28, 2021.
    https://doi.org/10.5720/kjcn.2021.26.1.37
    Copyright © 2021 The Korean Society of Community Nutrition
    Original Article

    The Changes in Obesity Prevalence and Dietary Habits in Korean Adults by Residential Area during the Last 10 Years — Based on the 4th (2007–2009) and the 7th (2016–2018) Korea National Health and Nutrition Examination Survey Data

    Da-Mee Kim,1 and Kyung-Hee Kim2
      • 1Lecturer, Department of Food & Nutrition, Duksung Women's University, Seoul, Korea.
      • 2Professor, Department of Food & Nutrition, Duksung Women's University, Seoul, Korea.
    • Kyung-Hee Kim. Department of Food & Nutrition, Duksung Women's University, Samyangro-gil 144-33, Dobonggu, Seoul 01369, Korea. Tel: +82-2-901-8591, Fax: +82-2-901-8372, Email: khkim@duksung.ac.kr
    Received December 21, 2020; Revised January 26, 2021; Accepted January 26, 2021.

    This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

    Abstract

    Objectives

    The purpose of this study was to discover the changes in obesity prevalence and dietary habits in Korean adults residing in various residential areas during the last 10 years.

    Methods

    Data on Korean adults aged 19 years and above was obtained from the 4th (2007–2009) and the 7th (2016–2018) Korea National Health and Nutrition Examination Survey. The subjects were classified into metropolitan (4th: n=5,977, 7th: n=6,651), urban (4th: n=4,511, 7th: n=5,512) and rural (4th: n=3,566, 7th: n=2,570) based on their residence. The general characteristics, nutrient intake, intake amount, food groups, and healthy dietary factors were analyzed. The association between residential areas and obesity prevalence were analyzed by multiple logistic regression.

    Results

    In urban and rural areas, the obesity rate increased in the 7th survey compared to the 4th survey, excluding the metropolitan area. The carbohydrate intake decreased, and lipid intake increased in the 7th survey compared to the 4th survey. Over the same period, the intake of cereals and vegetables decreased, and the intake of meat and processed foods increased. Rural residents had a higher intake of cereals and vegetables, and a lower intake of milk and processed foods than those in metropolitan areas and urban residents. The proportion of subjects who practiced a healthy diet increased in the 7th survey compared to the 4th survey. In the 4th survey, there was no relationship seen between the prevalence of obesity and the subject's residential area, but in the 7th survey, the odds ratio of obesity was higher in rural areas than in the metropolitan areas, confirming the regional gap (OR: 1.16, 95% CI=1.00–1.36, P=0.044).

    Conclusions

    This study showed that the obesity prevalence increased in rural residents compared to metropolitan residents, indicating a gap between the regions. The nutrient intake and intake of food groups changed in the 10 years under consideration, and there were differences seen between regions. Therefore, it is necessary to formulate a policy that will sreduce obesity prevalence and health inequalities between regions.

    Keywords
    KNHANES; residential area; obesity prevalence; dietary habits; practicing a healthy diet

    Tables

    Table 1
    General characteristics of study participants according to residence area and survey period in Korea

    Table 2
    Energy and nutrient intakes of study participants according to residence area and survey period in Korea

    Table 3
    Food group intakes of study participants according to residence area and survey period in Korea

    Table 4
    Compliance of Korean adults with the healthy eating practice of the 4th Health Plan of Korea Ministry of Health and Welfare

    Table 5
    Obesity risk of Korean adults according to residential areas

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    MeSH Terms
    Adult*
    Carbohydrates
    Diet, Healthy
    Eating
    Edible Grain
    Feeding Behavior*
    Humans
    Korea*
    Lipids
    Logistic Models
    Meat
    Milk
    Nutrition Surveys*
    Obesity*
    Odds Ratio
    Prevalence*
    Vegetables
    Metrics
    Share
    Tables
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