Korean Journal of Community Nutrition

Research Articles

[Korean]
Effects of watching Mukbang and Cookbang videos on adolescents’ dietary habits and mental health: cross-sectional study using the 18th Korea Youth Risk Behavior Survey: Seung-Hee Hong; Korean J Community Nutr 2024;29(2):156-170. Published online April 30, 2024; DOI: https://doi.org/10.5720/kjcn.2024.29.2.156

Abstract PDF: Objectives
This study aimed to investigate the association between how often Korean adolescents watch Mukbang and Cookbang videos and their dietary habits.
Methods
Data from the 18th Korea Youth Risk Behavior Survey conducted in 2022 was analyzed for this study. The study included 51,850 middle and high school students and assessed various aspects, including demographics, frequency of watching Mukbang and Cookbang videos per week, dietary habits, health behaviors, and mental health factors.
Results
Nearly a third (29.3%) of Korean adolescents watched Mukbang and Cookbang videos one to four times a week, while 13.5% watched them more than five times weekly. Females, those with lower academic achievement, and those from lower socioeconomic backgrounds were significantly more likely to be frequent viewers (P < 0.001). Increased viewing frequency was associated with poorer dietary habits. Adolescents who watched more frequently were less likely to eat breakfast and consume fruits and milk, while their consumption of fast food, high-caffeine drinks, sugary drinks, and late-night snacks increased (P < 0.001). Higher viewing frequency correlated with increased feelings of stress, depression, and loneliness (P < 0.001). Logistic regression analysis confirmed these associations. More frequent viewers were significantly less likely to eat breakfast (odds ratio (OR), 0.63; 95% confidence interval (CI), 0.58–0.68), and more likely to consume fast food (OR, 1.85; 95% CI, 1.69–2.02), high-caffeine drinks (OR, 1.43; 95% CI, 1.30–1.56), sugary drinks (OR, 1.54; 95% CI, 1.41–1.67), and late-night snacks (OR, 1.37; 95% CI, 1.25–1.51).
Conclusions
Our findings suggest that frequent exposure to Mukbang and Cookbang content is linked to unhealthy dietary habits in adolescents. Educational programs may be necessary to mitigate the potential for these videos to negatively influence dietary choices.

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[Korean]
Comparative study on the health and dietary habits of Korean male and female adults before and after the coronavirus disease 2019 pandemic: utilizing data from the 8 th Korea National Health and Nutrition Examination Survey (2019–2021): Chaemin Kim, Eunjung Kim; Korean J Community Nutr 2024;29(1):65-80. Published online February 29, 2024; DOI: https://doi.org/10.5720/kjcn.2024.29.1.65

Objectives
This study aims to compare changes in physical factors, health behaviors, eating habits, and nutritional intake among Korean male and female adults over a period of three years (2019–2021) before and after the outbreak of coronavirus disease 2019 (COVID-19).
Methods
This study utilized raw data from the 8^th Korea National Health and Nutrition Examination Survey (2019–2021). The participants in this study included 6,235 individuals in 2019, 5,865 individuals in 2020, and 5,635 individuals in 2021. Individuals whose daily energy intake was less than 500 kcal or exceeded 5,000 kcal were excluded from the study.
Results
In comparison to 2019, overweight/obesity rates, weight, waist circumference, weekend sleep hours, and resistance exercise days/week increased in both male and female during the COVID-19 pandemic. Regarding eating habits, the proportions of people skipping breakfast, not eating out, consuming health supplements, and recognizing nutritional labels increased in 2020 and 2021, whereas the rate of skipping dinner decreased. Total energy intake has continued to decrease for the two years since 2019. A comparison of nutrient intake per 1,000 kcal before and after the outbreak of COVID-19 revealed that intake of nutrients, including protein, phosphorus, iron, vitamin A, riboflavin, and niacin increased, while folic acid intake decreased. In male, calcium, phosphorus, riboflavin, and niacin intakes increased, whereas iron, vitamin C, and folic acid intakes decreased. In female, phosphorus, iron, vitamin A, and riboflavin intake increased significantly, while protein and niacin intake decreased significantly.
Conclusions
After COVID-19, the obesity rate, breakfast skipping rate, health supplement intake, and nutritional label use increased, while the frequency of eating out, dinner skipping rate, and total energy intake decreased. These environmental changes and social factors highlight the need for nutritional education and management to ensure proper nutritional intake and reduce obesity rates in the post-COVID-19 era.

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Intake of energy and macronutrients according to household income among elementary, middle, and high school students before and during the COVID-19 pandemic: a cross-sectional study
Chae-Eun Jeong, Heejin Lee, Jung Eun Lee
Korean Journal of Community Nutrition.2024; 29(3): 234. CrossRef

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[Korean]
A comparison of serum lipid concentration by drinking habits based on the 7th Korea National Health and Nutrition Examination Survey (KNHANES VII) : a cross-sectional study: Chang–Yun Park, Hyung-Sook Kim; Korean J Community Nutr 2023;28(5):404-413. Published online October 31, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.5.404

Abstract PDF: Objectives
This study compared serum lipid concentration according to drinking habits.
Methods
We analyzed data from the 7th Korea National Health and Nutrition Examination Survey (KNHANES VII). The study included 8,525 adults (3,651 males and 4,874 females), aged 30 – 59 years.
Results
There were differences in age, gender, education level, smoking status, physical activity, and waist circumference between drinkers and abstainers. The serum low-density lipoprotein-cholesterol (LDL-C) level of the drinkers was lower than those of the abstainers (P < 0.05). The serum triglyceride (TG) and high-density lipoprotein-cholesterol (HDL-C) concentrations were highest in the group that consumed alcohol ‘more than twice a week’ relative to the other groups (P < 0.001). The LDL-C and atherogenic index (AI) levels were lowest in the ‘more than twice a week’ drinking group compared to the other groups (P < 0.001). The serum TG and HDL-C concentrations were the highest in the ‘7 glasses/ time’ group (P < 0.001). The serum LDL-C concentration was the lowest in the ‘7 glasses/ time’ group (P < 0.001). Notably, the higher the frequency of binge drinking (7 glasses or more), the higher the concentration of TG (P < 0.001). The serum HDL-C concentration was significantly higher in the ‘no binge’ and ‘more than once a week’ groups compared to the other groups (P < 0.001). The serum LDL-C concentration and AI score were the lowest in the ‘more than once a week’ group (P < 0.001).
Conclusions
As the quantity and frequency of drinking increased, the serum TC concentration increased. Moreover, an increase in the serum HDL-C concentration led to a decrease in AI. The factors exacerbating cardiovascular disease increased simultaneously due to drinking. Our results suggest that for individuals with hypertriglyceridemia and patients with low HDL-cholesterolemia, separate guidelines based on the quantity and frequency of alcohol consumption are warranted.

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[Korean]
Health behaviors and eating habits in people’s 20s and 30s according to food content usage level on social media: a cross-sectional study: Seo-Yeon Bang, Bok-Mi Jung; Korean J Community Nutr 2023;28(5):392-403. Published online October 31, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.5.392

Abstract PDF

Objectives
This study was intended to investigate adults’ health behaviors and eating habits according to their levels of social media use.
Methods
From May 27 to July 11, 2022, an online survey was conducted of 452 male and female social media users in their 20s and 30s, and their eating habits and health behaviors were compared and analyzed according to their degree of social media use. For each of the three levels of food content use, the frequency of social media content use, and the total score range of average social media viewing time per day were divided into three parts, and a group with a score of less than 2 points was classified as low-use; a group with a score of 2 or more and less than 3 points was classified as middle-use; and a group with a score of 3 points or more was classified as high-use.
Results
The use of food content was higher in women than in men (P < 0.001), and higher in those in their 20s than in those in their 30s (P < 0.001). The group with a high level of food content use showed a higher rate of post-use hunger than the group with a low level (P < 0.01). The experience of eating after using food content was also higher in the group with a high level of use than in the group with a low level of use (P < 0.001). The group with a normal or high level of food content use had more negative eating habits than the group with a low level.
Conclusions
The study highlighted the need to provide desirable food content to people in their 20s and 30s with negative eating habits and to promote them so that they can use the right healthy nutrition–related content.

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The relationship between smartphone usage and eating behavior for elementary school students in Gangneung, South Korea: cross-sectional study
Minji Kim, Meera Jang
Korean Journal of Community Nutrition.2024; 29(4): 278. CrossRef

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[English]
Changes in dietary habits and chronic diseases before and after COVID-19 by regions using data from the 2018-2020 Korea Community Health Survey and Consumer Behavior Survey for Foods: a cross-sectional study: Surim Park, Eun-hee Jang, Seungmin Lee; Korean J Community Nutr 2023;28(2):124-140. Published online April 30, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.2.124

Abstract PDF: Objectives
This study examined the changes in dietary habits, the prevalence of chronic diseases, and mental health problems in the regional areas of the Republic of Korea before and after the COVID-19 pandemic to provide evidence of the status of regional health inequalities.
Methods
This study analyzed Korean adults aged 19 or older who participated in the Korea Community Health Survey (n = 686,708) and Consumer Behavior Survey for Foods (n = 19,109) from 2018 to 2020. The participants were classified according to their residence area (Seoul metropolitan area, Metropolitan cities, Provinces); 2018-2019 were defined as before COVID-19, and 2020 as after COVID-19. The dietary behaviors, chronic diseases, and mental health problems were measured using a self-report questionnaire.
Results
After COVID-19, the eating-out usage rate in the Seoul metropolitan area and Provinces decreased compared to before COVID-19 (P < 0.001), and when responding that they eat out, the frequency of eating out with household members in the Seoul metropolitan area increased (P = 0.024). The deliveries/takeout usage rate in the Provinces decreased after COVID-19 compared to before (P < 0.001). After COVID-19, the prevalence of obesity decreased in all regions (P < 0.001), and the prevalence of hypertension increased significantly in the Provinces (P = 0.015). The prevalence of diabetes mellitus increased continuously before and after COVID-19 in all regions (P < 0.002). High-risk subjective stress levels increased significantly in the Seoul metropolitan area (P < 0.001), and sleep duration significantly increased in all regions (P < 0.001). Major depressive disorder was reduced significantly in Metropolitan cities (P = 0.042) and Provinces (P < 0.001).
Conclusions
After the COVID-19 pandemic, the prevalence of chronic diseases and mental health problems showed regional differences along with changes in dietary habits. It is necessary to reflect the regional differences in dietary habits in future policies resolving regional health inequalities.

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[Korean]
Association between eating habits, sweet taste assessment, and high-sugar food consumption among elementary school students in Daegu: a descriptive study: Min-Jung Kim, Eun-Kyung Shin, Yeon-Kyung Lee; Korean J Community Nutr 2023;28(2):104-113. Published online April 30, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.2.104

Abstract PDF: Objectives
The purpose of this study was to analyze high-sugar food consumption habits frequency among elementary school students, and their correlations with eating habits and sweet taste assessment.
Methods
The participants of the study were 164 elementary school students in Daegu, in the fifth or sixth grade, along with their parents. A questionnaire investigated eating habits, high-sugar food consumption habits and frequency, and sweet taste assessment.
Results
The average eating habits score for elementary school students was determined to be 71.7 out of 100. Students with higher eating habits scores had lower high-sugar food consumption habits and frequency compared to those with lower eating habits scores. Sweet taste assessment revealed that students who preferred less sweetness chose a 5% sugar concentration, those with a preference for normal sweetness chose a 10% sugar concentration, and those who preferred sweeter tastes chose a 20% sugar concentration. Sweet taste assessment showed that students who tended to prefer less sweetness had the highest eating habits scores and the lowest scores for high-sugar food consumption habits and frequency. In addition, eating habits scores were found to be negatively correlated with high-sugar food consumption habits, high-sugar food consumption frequency, and sweet taste assessment. The sweet taste assessment was positively correlated with high-sugar food consumption habits and frequency.
Conclusions
Our results indicate that students with good eating habits had more desirable overall sugar intake habits, and when the preference for sweetness was high, the frequency of high-sugar food consumption was also high. Our study highlights the importance of educating elementary school students and their parents about the harmful effects of excessive sugar consumption, as well as the benefits of adopting healthy eating habits and creating supportive environments.

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Research Note

[Korean]
A Qualitative Study of the Awareness and Influencing Factors of the Dietary Habits of the Male and Female Workers' at a Manufacturing Facility in Gwangju: Ji Suk Yim, Young-Ran Heo; Korean J Community Nutr 2022;27(1):12-26. Published online February 28, 2022; DOI: https://doi.org/10.5720/kjcn.2022.27.1.12

Abstract PDF

Objectives
This paper aimed to provide an in-depth analysis of the factors influencing the dietary habits of male and female workers at a facility in Gwangju and their awareness of the same.
Methods
A total of 32 workers were divided into eight groups based on work type, gender, and age, and focus group interviews (FGIs) were conducted. The FGIs included cognitive, behavioral, and environmental questionnaires based on dietary habits and the social cognitive theory. The interviews were analyzed by subject and sub-subject using audio recordings and transcriptions.
Results
Male workers in the concerned company favored meat while female workers preferred vegetables, yet by and large, the preferences were irregular. Male workers living alone frequently ate ready meals and female workers often skipped meals. An analysis of the factors influencing the study subjects’ dietary habits from the cognitive, behavioral, and environmental perspectives showed that the main factors negatively affecting their dietary habits were shiftwork, living alone, and drinking. Workers were unaware of these factors and their poor eating habits. Instead, male workers complained of poor cooking skills, while female workers complained of loneliness. Workers thus appeared to need the support of nutrition education and a counseling assistant to cope with this situation.
Conclusions
The study identified the fact that the absence of nutrition education left the workers unaware of their poor eating habits. The workers would need counseling and support to help them build healthy dietary habits. It would also be necessary to focus on raising the workers’ cognitive awareness of dietary habits and enhancing their behavioral ability to cope with bad eating habits through nutrition education that reflects the reality of their situation.

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Effectiveness of a mobile health intervention on weight loss and dietary behavior changes among employees with overweight and obesity: a 12-week intervention study investigating the role of engagement
Imhuei Son, Jiyoun Hong, Young-Hee Han, Bo Jeong Gong, Meng Yuan Zhang, Woori Na, Cheongmin Sohn, Taisun Hyun
Korean Journal of Community Nutrition.2023; 28(2): 141. CrossRef

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Research Articles

[English]
The Study of Dietary Habits and Health Behaviors according to Physical Activity Type in Korean Adults -Based on the 2016~2018 Korea National Health and Nutrition Examination Survey-: Jin-A Kim, Sim-Yeol Lee; Korean J Community Nutr 2021;26(2):122-133. Published online April 30, 2021; DOI: https://doi.org/10.5720/kjcn.2021.26.2.122

Abstract PDF

Objectives
This study evaluated the dietary habits and health behaviors of Korean adults according to their physical activity. Methods: Adults aged 19~64 years, who participated in the 2016~2018 National Health and Nutrition Examination Survey, were enrolled in this study. The subjects were classified into the physical inactivity group, aerobic physical activity group, strength exercise group, and combined exercise group. Results: Significant differences in skipping breakfast, frequency of eating out, dietary supplements, and alcohol drinking status were observed among physical activity groups (P < 0.001). The combined exercise group had the highest % KDRI of protein, vitamin A, thiamin, riboflavin, niacin, calcium, potassium, and iron (P < 0.001). The physical inactivity group had the highest obesity rate (35.1%), and they perceived their body image type to be obese. In the combined exercise group, 47.8% of respondents said they were in good health (P < 0.001). The health-related quality of life score of the physical inactivity group was the lowest, with a score of 0.94. The metabolic syndrome risk rate of the combined exercise group was lower at 0.62 times (95% CI, 0.51-0.75) than the physical inactivity group. Conclusions: The physical activity type was associated with metabolic syndrome. These results can be useful for supporting dietary education and physical activity programs for adults.

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The Association between the Type and Level of Physical Activity and Metabolic Syndrome in Korean Adults Aged 40 Years and over: Results from the Eighth Korea National Health and Nutrition Examination Survey (2019–2021)
Namkuk Son
The Korean Journal of Sports Medicine.2024; 42(2): 145. CrossRef
Consumption of protein supplements/protein-fortified foods among young adults in Jeju
Hyoju Lee, Youjeong Jang, Sumin Kim, Kyungho Ha
Journal of Nutrition and Health.2024; 57(2): 261. CrossRef
고령자의 신체건강 및 식생활 행태가 영양소 섭취량에 미치는 영향
하리 임, 다솔 김, 나미 주
Korean Journal of Food and Cookery Science.2023; 39(6): 518. CrossRef
Association of Dietary Quality with Subjective Health-Related Perception and Chronic Diseases According to Age Segmentation of Korean Elderly
Sojeong Lee, Seungmin Lee
Korean Journal of Community Nutrition.2021; 26(5): 363. CrossRef

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[English]
The Changes in Obesity Prevalence and Dietary Habits in Korean Adults by Residential Area during the Last 10 Years – Based on the 4^th (2007-2009) and the 7^th (2016-2018) Korea National Health and Nutrition Examination Survey Data: Da-Mee Kim, Kyung-Hee Kim; Korean J Community Nutr 2021;26(1):37-47. Published online February 28, 2021; DOI: https://doi.org/10.5720/kjcn.2021.26.1.37

Abstract PDF

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 4^th (2007-2009) and the 7^th (2016-2018) Korea National Health and Nutrition Examination Survey. The subjects were classified into metropolitan 4^th : n=5,977, 7^th : n=6,651), urban (4^th : n=4,511, 7^th : n=5,512) and rural (4^th : n=3,566, 7^th : 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 7^th survey compared to the 4^th survey, excluding the metropolitan area. The carbohydrate intake decreased, and lipid intake increased in the 7^th survey compared to the 4^th 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 7^th survey compared to the 4^th survey. In the 4^th survey, there was no relationship seen between the prevalence of obesity and the subject’s residential area, but in the 7^th 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 reduce obesity prevalence and health inequalities between regions.

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Risk of Pancreatic Cancer After Acute Pancreatitis: A Retrospective Analysis of the Korean National Sample Cohort
Sung Hoon Jeong, Kyungduk Hurh, Eun-Cheol Park, Ja-ho Leigh, Seung Hoon Kim, Sung-In Jang
Journal of Korean Medical Science.2024;[Epub] CrossRef
Association of ultra-processed food with diabetes and impaired fasting glucose in elderly populations (urban and rural): a cross-sectional study
Seung Jae Lee, Mi Sook Cho
Korean Journal of Community Nutrition.2024; 29(1): 51. CrossRef
Association of heavy metal complex exposure and neurobehavioral function of children
Minkeun Kim, Chulyong Park, Joon Sakong, Shinhee Ye, So young Son, Kiook Baek
Annals of Occupational and Environmental Medicine.2023;[Epub] CrossRef
Anti-Obesity Activity of Ethanol Extract of Veronica peregrina L.
Su Min Kim, Cheol Park, Yung Hyun Choi, Hye Jin Hwang
Journal of the Korean Society of Food Science and Nutrition.2023; 52(4): 350. CrossRef
Effect of Type of Nutrition Labeling on the Healthfulness Evaluation and Purchase Intentions of Home Meal Replacements (HMR) in South Korea
Mee-Young Joe
Korean Journal of Community Nutrition.2022; 27(5): 387. CrossRef
Blood Biochemical Characteristics, Dietary Intake, and Risk Factors Related to Poor HbA1c Control in Elderly Korean Diabetes Patients: Comparison between the 4th(2007-2009) and the 7th(2016-2018) Korea National Health and Nutrition Examination Surveys
Sung-Won Oh, Sook-Bae Kim
Korean Journal of Community Nutrition.2022; 27(5): 406. CrossRef
Interactions between red and processed meat consumption and APOA5 gene variants associated with the incidence of metabolic syndrome in Korean adults
Woo Jeong Choi, Dayeon Shin
Genes & Nutrition.2022;[Epub] CrossRef
Association of Dietary Quality with Subjective Health-Related Perception and Chronic Diseases According to Age Segmentation of Korean Elderly
Sojeong Lee, Seungmin Lee
Korean Journal of Community Nutrition.2021; 26(5): 363. CrossRef
Regional Disparity in Adult Obesity Prevalence, and Its Determinants
Bongjeong Kim
Journal of Health Informatics and Statistics.2021; 46(4): 410. CrossRef
Obese Frailty and Combined Exercise
Hae Sung Lee, Jong-Hee Kim
Exercise Science.2021; 30(4): 419. CrossRef

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[English]
Relationship between Dietary Habits, Life Stress and Nutrition Knowledge of High School Students in Gyeonggi Area: Kyung Ae Park, Hongmie Lee, Kyunghee Song; Korean J Community Nutr 2020;25(2):126-136. Published online April 30, 2020; DOI: https://doi.org/10.5720/kjcn.2020.25.2.126

Abstract PDF

Objectives
This study was performed to examine dietary habits, life stress, and nutrition knowledge among high school students in Gyeonggi area.
Methods
A total of 431 high school students (210 males, 221 females) in Gyeonggi area participated in this study from November to December of 2011. The study was a questionnaire-based survey that included dietary habits, dietary attitudes, life stress, and nutrition knowledge.
Results
Body weight, height, and body mass index were all higher in male students than in female students (P < 0.001, respectively). For dietary habits, the average score (P < 0.01) and scores for considering combination of food groups (P < 0.05), eating green and orange vegetables (P < 0.05), eating meat, fish, eggs, or beans everyday (P < 0.05), drinking milk (P < 0.001), and eating seaweed (P < 0.01) were higher in male students than in female students. For dietary attitudes, the average score (P < 0.05) and scores for the five items were significantly different between male and female students. Male students showed a significantly lower nutrition knowledge score than female students (P < 0.05). Life stress score of students largely was attributable to academic factors, and female students showed higher stress score for academic, personal, and surrounding environmental (P < 0.05, respectively) factors than male students. Dietary habit score (P < 0.01) and nutrition knowledge score (P < 0.05) in female students as well as dietary attitude score (P < 0.05) in male students were negatively correlated with life stress score. Dietary habit scores in male and female students were positively correlated with dietary attitude score (P < 0.01, respectively). Need for nutrition education was significantly higher in female students than in male students (P < 0.05).
Conclusions
This study provides basic information on dietary habits, dietary attitudes, life stress, and nutrition knowledge according to sex and suggests gender-specific practical nutrition education programs to address undesirable dietary habits and attitudes in students with higher stress levels.

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Application and effectiveness of a nutrition education program based on the 2020 Dietary Reference Intakes for Koreans for undergraduates in Gyeongsangnam-do and Gyeonggi-do
Mijoo Choi, Hyein Jung, Nayoung Kim, Sangah Shin, Taejung Woo, Eunju Park
Journal of Nutrition and Health.2023; 56(6): 730. CrossRef
Relationship among Health Interest, Depression and Dietary Habits of College Students according to Sex in Seoul and Gyeonggi Areas
Kyung Ae Park, Jiwon Kim, Onjeong Cho, Kyunghee Song
Journal of the East Asian Society of Dietary Life.2021; 31(4): 213. CrossRef

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Original Articles

[English]
Home Meal Replacement Use and Eating Habits of Adults in One-Person Households: Mi Kyeong Choi, Eun Sun Park, Mi Hyun Kim; Korean J Community Nutr 2019;24(6):476-484. Published online December 31, 2019; DOI: https://doi.org/10.5720/kjcn.2019.24.6.476

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