Journal List > J Nutr Health > v.52(3) > 1128189

J Nutr Health. 2019 Jun;52(3):297-309. Korean.
Published online Jun 24, 2019.
© 2019 The Korean Nutrition Society
Relationship among the use of food-related content, dietary behaviors, and dietary self-efficacy of high school students in Seoul and Gyeonggi areas
Min-Hwan Oh,1 Kyungeui Hong,2 and Sung-Eun Kim2
1Major in Nutrition Education, Graduate School of Education, Sookmyung Women's University, Seoul 04310, Korea.
2Department of Food and Nutrition, Sookmyung Women's University, Seoul 04310, Korea.

To whom correspondence should be addressed. tel: +82-2-2077-7722, Email:
Received Mar 25, 2019; Revised May 16, 2019; Accepted May 20, 2019.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.



This study examined the relationship among the use of food-related content (FRC), dietary behaviors, and dietary self-efficacy to demonstrate the need for nutrition education to help adolescents build healthy eating habits and provide evidence for developing nutrition education programs for adolescents.


Three hundred and eighty-one high school students in Seoul and Gyeonggi areas participated in the study. The subjects were divided into three groups (low, medium, and high) according to the level of use of the FRC, and their general characteristics, dietary behaviors, and dietary self-efficacy were analyzed. Correlation analysis was performed between FRC usage, dietary behaviors, and dietary self-efficacy, and the mediating effects of dietary self-efficacy on the relationship between the level of the use of FRC and dietary behaviors were estimated.


A higher level of FRC usage was associated with an increased daily cost of eating out and snacking, but no difference was observed in the BMI range. The subjects in a group with a high level of FRC usage ate convenience store or instant foods instead of homemade meals (p = 0.033), had a late-night meal or snack (p = 0.024), and turned to emotional eating under stress (p < 0.001) more than those in the low level group. In addition, the high level group checked the nutrition facts label more carefully when purchasing processed foods (p = 0.016) and exercised at least 30 minutes daily, not considering physical education classes (p = 0.057). The higher level of FRC use, the lower the dietary self-efficacy, whereby the subscales ‘environmental stimulus control efficacy’ and ‘affective factor control efficacy’ showed complete mediating effects.


Given that FRC has been increased recently, adolescents are in need of support to help them control and enhance their dietary self-efficacy as well as develop healthy dietary behaviors through proper nutrition education programs.

Keywords: adolescents; food-related content; dietary behaviors; dietary self-efficacy


Fig. 1
The mediating effect models for dietary self-efficacy on the path from the level of food-related content usage (predictor) to dietary behaviors (outcome): (A) Environmental stimulus control efficacy subscale; (B) Affective factor control efficacy subscale. #( ) indicates the path coefficient when controlled by dietary self-efficacy (mediator).
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Table 1
General characteristics of the subjects and the use of food-related content
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Table 2
Dietary behaviors and the level of food-related content usage1)
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Table 3
Taste and cooking method preferences and the level of food-related content usage1)
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Table 4
Dietary self-efficacy and the level of food-related content usage1)
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Table 5
Correlation analysis between the constructs
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Table 6
Regression analysis between the constructs
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Table 7
Mediating effect of the environmental stimulus control efficacy subscale of dietary self-efficacy
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Table 8
Mediating effect of the affective factor control efficacy subscale of dietary self-efficacy
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This research was supported by Sookmyung Women's University Research Grants (1-1703-2049).

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