Korean Journal of Community Nutrition

[Korean]
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 J Community Nutr 2024;29(3):234-252. Published online June 30, 2024; DOI: https://doi.org/10.5720/kjcn.2024.29.3.234

Abstract PDF PubReader ePub: Objectives
This study examined the intake of energy and macronutrients among elementary, middle, and high school students according to household income before the COVID-19 pandemic (2016–2019), during the social distancing period (2020–2021), and after the social distancing measures were lifted (2022).
Methods
We included 5,217 students aged 5–18 from the Korea National Health and Nutrition Examination Survey (KNHANES) conducted between 2016 and 2022. Dietary intake was assessed using one-day 24-hour dietary recalls. We estimated the least squares means (LS-means) of intake according to household income for each period using a weighted linear regression model, adjusted for age and sex. Differences in LS-means between the periods were analyzed using the t-test.
Results
During the social distancing period, the LS-means of energy intake among students decreased significantly by 143.2 kcal/day compared to pre-pandemic levels (P < 0.001). Students from low-income households experienced a more pronounced decrease in energy intake (−379.1 kcal/day, P < 0.001) and macronutrient intake compared to those from other income groups. Energy intake at school significantly declined for all income groups during the social distancing period compared to before the pandemic. No significant changes in home energy intake were observed among low-income students, whereas there was an increase for students from higher-income groups. Before the pandemic, 8.5% of students from low-income households reported insufficient food due to economic difficulties; this figure rose to 21.3% during the pandemic.
Conclusions
During the pandemic, students from low-income families experienced significantly lower intake of energy and macronutrients compared to pre-pandemic levels. The most substantial reductions were noted among low-income students, largely due to the lack of compensation for decreased school-based intake with increased intake at home.

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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]
Understanding consumer awareness and utilization of local food in Jecheon during the COVID-19 pandemic: a descriptive study: Hye-ryeong Shin, Soojin Park; Korean J Community Nutr 2023;28(4):329-339. Published online August 31, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.4.329

Abstract PDF: Objectives
This study aims to explore consumer awareness and usage patterns of local food in Jecheon city during the COVID-19 pandemic, contributing to the establishment of the Jecheon City Food Plan.
Methods
Surveys were conducted from July 24 to August 24, 2021, using a combination of web-link and self-administered methods for adults living in Jecheon city (n = 250). Descriptive analysis, t-test, importance and satisfaction analysis (ISA) of local food choice attributes were performed using SPSS Statistics.
Results
Participants prioritized freshness when purchasing agricultural products. The freshness of Jecheon local food was the selection attribute with the highest consumer satisfaction and could provide purchase motivation. Approximately 73.6% of respondents understood the concept of local food, and 70% were familiar with Jecheon's local food.Notably, 94.8% expressed an intention to purchase but held negative views on selling local food in other areas. The need to increase the supply of local food to vulnerable populations and public school catering was highly recognized. The ISA identified ‘affordable price’, ‘delivery service’, and ‘product information’ as areas requiring improvement. On the other hand, ‘freshness of products’, ‘quality for the price’, and ‘support for local farmers and economy’ were identified as attributes to be maintained and strengthened.
Conclusions
Consumers in Jecheon city recognized local foods as more than just 'consumer goods’. Our findings suggest the need for further research on local food revitalization and more comprehensive local food planning to enhance consumer satisfaction.

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[Korean]
Changes in nutritional status of Korean older adults during COVID-19 Pandemic by household income and demographic factors -using the Korea National Health and Nutrition Examination Survey(2019-2020): a cross-sectional study: You-Sin Lee, Yoonna Lee; Korean J Community Nutr 2023;28(4):302-316. Published online August 31, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.4.302

Abstract PDF

Objectives
The study aim was to identify changes in the nutritional status of older adults during the COVID-19 pandemic according to household income and demographic characteristics.
Methods
Study participants were 2,408 adults aged 65 and over who participated in the 2019–2020 Korea National Health and Nutrition Examination Survey (KNHANES). To examine changes in nutrient intake levels resulting from COVID-19, data of 2019 and of 2020 were compared. Study participants were divided into three groups based on household income level to compare these changes. The changes were compared according to household income level, age group, and household type.
Results
Percentages of recommended intakes for energy, protein, and most micronutrients were the lowest for the low-income group of both males and females in 2020. The Mean Adequacy Ratio (MAR) score was the lowest for the low-income group in both years. When comparing nutrient density for 2019 and 2020 by income group, the male low-income group experienced a decrease in nutrient densities of vitamin A, thiamine, calcium, and iron. For the same group, a decreased percentage for energy intake from protein was noted. Fruit intake was lowest in the low-income group for both males and females. Low-income males had the lowest intake levels for meat, fish, eggs, and legumes in both 2019 and 2020 and the lowest milk and milk product intake levels in 2020. Older adults living alone or single older adults with children had lower MAR scores than those living with a spouse. Older adults living alone experienced decreases in energy and thiamine and iron intake levels in 2020 compared to their intake levels in 2019.
Conclusions
Because of the COVID-19 pandemic, nutrition intake levels worsened for older adult males in the low-income group and older adults living alone. This finding shows the need for a more systematic nutritional support strategy for the vulnerable older adults population in national disaster situations.

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Development of Protein Enhanced Diet for Socially Vulnerable Elderly
Jihye Hong, Hyung-Geun Jeon, Seulgi Kim, Gitae Park
Journal of the East Asian Society of Dietary Life.2024; 34(1): 39. CrossRef

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[Korean]
Dietary guidelines adherence and changes in eating habits among college students in the post-COVID-19 period: a cross-sectional study: Eunyoung Yoon; Korean J Community Nutr 2023;28(3):220-234. Published online June 30, 2023; DOI: https://doi.org/10.5720/kjcn.2023.28.3.220

Abstract PDF

Objectives
This study aimed to assess the adherence to dietary guidelines among college students in the post-COVID-19 era and examine the changes in their dietary habits as the learning environment transitioned from remote to in-person classes.
Methods
We conducted a survey involving 327 college students in Daejeon from March to April 2023. The survey questionnaires included various factors, including age, gender, type of residence, frequency of use of delivery food, convenience food, and eating out. In addition, we investigated the extent of adherence to the dietary guidelines for Koreans and the degree of dietary changes following the post-COVID-19 shift in class format were investigated. For comparative analysis of the level of adherence to dietary guidelines in relation to dietary habit changes, an ANOVA and a post hoc Scheffe test were employed. We also performed a multiple linear regression analysis to identify dietary factors influencing the level of adherence to dietary guidelines.
Results
The study revealed a high rate of convenience food consumption and a low rate of homemade food intake among students. There was a marked increase in the consumption of processed foods, convenience foods, dining out, sweet foods, high-fat fried foods, beverages, and alcohol following the transition from online to in-person classes. When examining adherence to Korean dietary guidelines, the highest scored practice was ‘Hydration’, and the lowest was ‘Breakfast habit’. Increased consumption of convenience foods, late-night snacks, and dining out were negatively correlated with adherence levels to dietary guidelines, specifically correlating with ‘Healthy weight’, ‘Hydration’, ‘Breakfast habit’, and the total score of adherence. The adoption of ‘regular meals’ was positively associated with increased adherence levels to dietary guidelines.
Conclusions
The transition from remote to in-person classes post-COVID-19 led to increased intake of convenience foods, dining out, sweet foods, high-fat fried foods, and alcohol. The rise in convenience food and late-night snack consumption negatively influenced several aspects of the dietary guidelines adherence, thereby suggesting the need for strategies to encourage healthy dietary habits among college students.

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Attributes of multiple concurrent functional gastrointestinal disorders in female university students in South Korea
Hyo Kyung Kim, Hyunjung Kim, Aram Lee
Women & Health.2024; 64(8): 674. 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]
A Study on the Dietary Behavior of Korean Adults: Focus on Dietary Supplement Intake, Household Size, and COVID-19: Jinkyung Choi; Korean J Community Nutr 2022;27(6):468-479. Published online December 31, 2022; DOI: https://doi.org/10.5720/kjcn.2022.27.6.468

Abstract PDF

Objectives
This study investigates dietary supplement intakes by examining the characteristics of dietary and health-related behaviors. Data were obtained from the Korea National Health and Nutrition Examination Survey (KNHANES). Dietary and health-related behaviors were also examined before and after the occurrence of COVID-19 and household types (multi-members vs. single person).
Methods
Data used in this study were collected from the 2019-2020 KNHANES by including adults aged 19 to 64 years. Pregnant, lactating, and subjects consuming calories less than 500 and more than 5,000 were excluded. Differences in dietary and health-related behaviors before and after COVID-19, and between the two types of households were analyzed by Chi-square analyses using Rao-Scott. Logistic regression analyses were applied to determine which dietary and health-related behaviors affected the dietary supplement intakes. In addition, descriptive analysis was run for demographic characteristics.
Results
The dietary supplement intake rate differed significantly with respect to the gender, age, education, marital status, and household income. Dietary supplement intakes, frequency of eating out, obesity, and body weight changes were significantly different before and after COVID-19. In addition, meal evaluation, frequency of eating out, drinking, smoking, activity, subjective health evaluation, and body weight changes showed significant differences by household type. Attitude towards nutrition, activity, meal evaluation, obesity, and smoking were factors that affected the intake of dietary supplements.
Conclusions
While increased intake of dietary supplements is a prevalent phenomenon, this intake needs to be monitored and studied closely, considering the sociodemographic characteristics and dietary and health-related behaviors. Furthermore, the dietary supplement intake trend after COVID-19 needs to be studied along with food intake.

Citations

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Comparison of Eating Habits and Behaviors of Young Single-Person Households based on Food-Related Lifestyle
Dokyung Kim, Sim-Yeol Lee
Korean Journal of Health Promotion.2023; 23(3): 117. CrossRef
Effect of Dietary Supplements on Vitamin and Mineral Intake Among Koreans: Data From the 2018-2020 Korea National Health and Nutrition Examination Survey
Moon Yeong Hwang, Jiyoun Hong
Food Supplements and Biomaterials for Health.2023;[Epub] CrossRef
Dietary guidelines adherence and changes in eating habits among college students in the post-COVID-19 period: a cross-sectional study
Eunyoung Yoon
Korean Journal of Community Nutrition.2023; 28(3): 220. CrossRef

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[Korean]
A Study on the Dietary and Lifestyle Changes of Middle-Aged Women in the Gwangju Area in the COVID-19 Era: Moon-Soon Kim, Bok-Mi Jung; Korean J Community Nutr 2021;26(4):259-269. Published online August 31, 2021; DOI: https://doi.org/10.5720/kjcn.2021.26.4.259

Abstract PDF

Objectives
This study aimed to investigate the changes in the eating habits and lifestyle of middle-aged women in Gwangju during the COVID-19 pandemic. Methods: A total of 428 middle-aged women aged between 40 and 60 participated in a survey relating to general information, food and lifestyle, health functional food, and menopausal symptoms. The correlation between the variables was analyzed. Results: In the positive habits, the intake of nutritional supplements for immunity enhancement increased the most, followed by the use of media to learn healthy eating tips, and diets including healthy food. Negative habits increased in the order of frequency of taking delivery orders, levels of stress or anxiety, and time spent sitting or watching movies. In the case of recommended foods, the intake increased the most in the order of eggs, fruits, vegetables, milk/dairy products, and seaweed. Non-recommended foods increased in the order of meat, bread, rice, and noodles. The awareness of health functional foods was in the increasing order of interest, knowledge, consumption experience, and purchase amount. The type of health functional food intake was in the increasing order of probiotics, multivitamin and mineral supplements, vitamin C, collagen, and omega-3. Menopausal symptoms were in the increasing order of bone and joint pain, poor sleep quality, emotional ups and downs, loneliness, and feeling of emptiness. In the correlation of major variables, positive habits showed a significant positive correlation with recommended food intake and the recognition of health functional foods. Negative habits showed a significant positive correlation with non-recommended food intake and a significant positive correlation with menopausal symptoms. Recommended food intake showed a significant positive correlation with health functional food recognition and intake and menopausal symptoms. Conclusions: This study suggests that it is necessary to establish social measures to reduce the negative effects of the COVID-19 pandemic on middle-aged women and to ensure effective self-management through a healthy lifestyle since the pandemic has a long-term impact.

Citations

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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 8th Korea National Health and Nutrition Examination Survey (2019–2021)
Chaemin Kim, Eunjung Kim
Korean Journal of Community Nutrition.2024; 29(1): 65. CrossRef
Quality Characteristics of Staple Breads Based on Baking Methods
Eun-Hee Doo
Journal of the East Asian Society of Dietary Life.2024; 34(1): 77. CrossRef
Dietary guidelines adherence and changes in eating habits among college students in the post-COVID-19 period: a cross-sectional study
Eunyoung Yoon
Korean Journal of Community Nutrition.2023; 28(3): 220. CrossRef
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 Journal of Community Nutrition.2023; 28(2): 124. CrossRef
광주광역시 지역민의 영양교육 요구도 조사 분석
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Korean Journal of Food and Cookery Science.2023; 39(2): 100. CrossRef
Consumers’ perceptions of dietary supplements before and after the COVID-19 pandemic based on big data
Eunjung Lee, Hyo Sun Jung, Jin A Jang
Journal of Nutrition and Health.2023; 56(3): 330. CrossRef
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Dan Bi Lee, Jung Hyun Ahn, Jin Young Nam
Korean Journal of Health Education and Promotion.2022; 39(2): 1. CrossRef
Factors Related to Changes of Daily Life during COVID-19
Kyungjin Min, Pilhan Yun, Sangshin Park
Journal of Health Informatics and Statistics.2022; 47(4): 297. CrossRef
Dietary Behavior and Diet Quality in the Korean Adult Population by Income Level before and after the COVID-19 Pandemic: Using the Korean National Health and Nutrition Examination Survey (2019-2020)
Hye-Min Na, Bok-Mi Jung
The Korean Journal of Community Living Science.2022; 33(3): 397. CrossRef

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