Korean Journal of Community Nutrition

Research Article

[Korean]
Dietary Iron Intake of Koreans Estimated using 2 Different Sources of Iron Contents are Comparable: Food & Nutrient Database and Iron Contents of Cooked Foods in the Korean Total Diet Study: Jeeyeon Lee, Sung Ok Kwon, Yoonjae Yeoh, Min Jeong Seo, Gae Ho Lee, Cho-il Kim; Korean J Community Nutr 2022;27(3):245-253. Published online June 30, 2022; DOI: https://doi.org/10.5720/kjcn.2022.27.3.245

Objectives
This study was conducted to find out if the dietary iron intake of Koreans estimated by 2 different methods (iron content sources) using the food intake data from the Korea National Health and Nutrition Examination Survey (KNHANES) are comparable. One method was based on the KNHANES's Food & Nutrient Database (FND) derived mainly from the Korean Food Composition Table and the other used the iron content (IC) of food samples processed in the Korean Total Diet Study (KTDS).
Methods
Dietary intake data from the 2013-2016 KNHANES was used to select representative foods (RFs) in KTDS for iron analysis. Selection of the RFs and cooking methods for each RF (RF × cooking method pair) was performed according to the ‘Guidebook for Korean Total Diet Studies’ and resulted in a total of 132 RFs and 224 ‘RF × cooking method’ pairs. RFs were collected in 9 metropolitan cities nationwide once or twice (for those with seasonality) in 2018 and made into 6 composites each, based on the origin and season prior to cooking. Then, the RF composites prepared to a ‘table ready’ state for KTDS were analyzed by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). Dietary iron intake of the Korean population was estimated using only RFs’ intake data based on the 2 sources of iron content, namely FND-KNHANES and IC-KTDS.
Results
RFs in KTDS covered 92.0% of total food intake of Koreans in the 2016-2018 KNHANES. Mean iron intake of Koreans was 7.77 mg/person/day by IC-KTDS vs 9.73 mg/person/day by FND-KNHANES. The major food groups contributing to iron intake were meats (21.7%), vegetables (20.5%), and grains & cereals (13.4%) as per IC-KTDS. On the other hand, the latter source (FND-KNHANES) resulted in a very different profile: grains & cereals (31.1%), vegetables (16.8%), and meats (15.3%). While the top iron source was beef, accounting for 8.6% in the former, it was polished rice (19.2%) in the latter. There was a 10-fold difference in the iron content of polished rice between 2 sources that iron intakes excluding the contribution by polished rice resulted in very similar values: 7.58 mg/person/day by IC-KTDS and 7.86 mg/person/day by FNDKNHANES.
Conclusions
This study revealed that the dietary iron intake estimated by 2 different methods were quite comparable, excluding one RF, namely polished rice. KTDS was thus proven to be a useful tool in estimating a ‘closer-to-real’ dietary intake of nutrients for Koreans and further research on various nutrients is warranted.

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Dietary sodium and potassium intake of Koreans estimated using 2 different sources of their contents in foods, Food & Nutrient Database and the Korean Total Diet Study: a comparative study
Jee Yeon Lee, Sung Ok Kwon, Soo Hyun Lee, Min Jeong Seo, Gae Ho Lee, Cho-il Kim
Korean Journal of Community Nutrition.2023; 28(3): 235. CrossRef

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Original Articles

[English]
Development of 9(th) Revision Korean Food Composition Table and Its Major Changes: Su Hui Park, Se Na Kim, Sang Hoon Lee, Jeong Sook Choe, Youngmin Choi; Korean J Community Nutr 2018;23(4):352-365. Published online August 31, 2018; DOI: https://doi.org/10.5720/kjcn.2018.23.4.352

Abstract PDF PubReader

OBJECTIVES
The Korean Food Composition Table (KFCT) was first published in 1970, and has since been updated every five years by the Rural Development Administration (RDA). This study was conducted to introduce the development strategies, features, and challenges of the 9th revision of the KFCT.
METHODS
Due to the increasing demands of nutrient database users and generators, the RDA started a new research project in 2013 to improve the quantity and quality of data for the 9th revision of the KFCT. Over 1,000 food items frequently consumed in Korea were selected as key foods using the results of the Korean National Health and Nutrition Examination Survey. About 200 raw materials and processed food items were collected and analyzed every year. Target nutrients that were analyzed by collaborative labs, such as, sugars, selenium, iodine, and biotin, were increased from 22 to 43. Analytical sample handling procedures and data quality evaluation systems were also established in collaboration with 10 contracted labs. Data were evaluated for data quality according to the FAO/INFOODS, CODEX, and AOAC guidelines.
RESULTS
The 9th revision contains data on 3,000 food items and up to 43 and 140 food nutrients for the printed table and the excel database file, respectively. Overall, 1,485 data items were newly added, 973 of which were provided by the RDA and 512 were cited from foreign nutrient databases. The remaining 1,515 food items were maintained as in the 8th revision.
CONCLUSIONS
The KFCT provides the basic infrastructure for food and nutrition policy, research, and dietary practice in South Korea. The use of the KFCT has increased exponentially in the past few years in both public and private sectors; accordingly, increased efforts should be paid to the preparation, improvement, and maintenance of KFCT.

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[English]
Salinity of Representative Korean Foods High in Sodium from Home Meals, Foodservices, and Restaurants: Lin Jiang, Damin Shin, Yeon Kyung Lee; Korean J Community Nutr 2018;23(4):333-340. Published online August 31, 2018; DOI: https://doi.org/10.5720/kjcn.2018.23.4.333

Abstract PDF PubReader

OBJECTIVES
This study was conducted to analyze the salinity of representative Korean foods high in sodium to generate data for use as a fundamental resource for setting salinity standards in foods.
METHODS
A total of 480 foods from 16 representative Korean foods high in sodium were collected from 10 households, 10 industry foodservice establishments, and 10 Korean restaurants in four regions (Capital area, Chungcheong Province, Gyeongsang Province, and Jeolla Province) and analyzed for salinity.
RESULTS
Among the foods, stir-fried anchovies (4.07~4.45%) showed the highest salinity, followed by pickled onion (1.86~2.62%), cabbage kimchi (1.83~2.2%), braised burdock and lotus root (1.79~2.17%), and sliced radish kimchi (1.78~1.89%) (p < 0.001). The salinity of kimchi from home meals (2.2%) was significantly higher than that of foodservice (1.83%) and restaurant (1.93%) kimchi (p < 0.05). Salinity in each group of food was highest in kimchi (1.83~2.04%), followed by braised dishes (1.54~1.78%), steamed dishes (1.0~1.22%), stir-fried dishes (1.02~1.18%), and soup or stew (0.74~1.02%) (p < 0.001). The salinity of soup and stew from restaurants (1.02%) was significantly higher than that of home meal (0.84%) and foodservice (0.74%) soup and stew.
CONCLUSIONS
Determination of the salinity of representative Korean foods known to be high in sodium by eating place is expected to be useful to establishing guidelines for reduction of salinity.

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Sodium Reduction Practice and Importance-Performance Analysis of Sodium Reduction Methods in School Foodservice in Daegu
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Korean Journal of Community Nutrition.2020; 25(5): 386. CrossRef
Comparison of the portion sizes of Korean adults across eating places: Korea National Health and Nutrition Examination Survey (2012–2016)
Hye-Sook Hong, Seon-Joo Park, Do-Kyung Lee, Hae-Jeung Lee
Journal of Nutrition and Health.2020; 53(6): 676. CrossRef
Development of standards for reducing the sodium content and salinity of Korean fermented soybean sauces and representative Korean foods high in sodium
Lin Jiang, Eun-Kyung Shin, Jung-Sook Seo, Yeon-Kyung Lee
Journal of Nutrition and Health.2019; 52(2): 185. CrossRef
Current status, perception and practicability of restaurant staffs related to reducing sodium use in Seongnam, Korea
So-Hyun Ahn, Jong Sook Kwon, Kyungmin Kim, Yoonna Lee, Hye-Kyeong Kim
Journal of Nutrition and Health.2019; 52(5): 475. CrossRef

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[English]
Development of a Korean Food Culture Education Textbook for Married Female Immigrants: Jeong Sook Lee; Korean J Community Nutr 2016;21(5):415-425. Published online October 31, 2016; DOI: https://doi.org/10.5720/kjcn.2016.21.5.415

Abstract PubReader

OBJECTIVES
The purpose of the study was to develop a textbook of the integrated education of Korean food culture and language for married female immigrants.
METHODS
An analysis was conducted with the textbooks and researches for married female immigrants, and dietary life related contents were extracted. The contents were organized by activity oriented approach which is acquired the culture. The evaluation was conducted through depth interview with 6 married female immigrants through an analysis of the qualitative materials.
RESULTS
The text book comprised of 30 Korean food recipes with the target expressions and vocabularies. It also included Korean basic table setting, Korean table manner, main dishes and side dishes, basic cutting, seasoning and garnish, measure of the ingredients, symbolic food, regional food culture, choice of food ingredients, shopping, bargaining, taste expression, color expression, all sorts of spices, Korean traditional festival food, and seasonal customs and food. For intensifying communication, activity which is close to real life was added. Through cooking, married female immigrants expose words and sentence patterns and that allows to evaluate their level of understanding. We observed that the developed textbook is suited for married female immigrants' needs and cognitive level. The text book included a comparative study between Korean culture and their country's culture, which could provide the motive for accepting each otherâ€™s cultures. The study showed how to develop a textbook that integrates Korean language education and Korean food culture and how to apply the textbook in real life.
CONCLUSIONS
The correct understanding about Korean food culture could lead to improvements communication ability. Useful information which relates to Korean food, recipes, and food culture could increase daily life satisfaction. Conducting both cultural education and language education could increase the participation of married female immigrants in learning activities. Therefore this study could help these females to adapt Korean society and manage family dietary life effectively.

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Analysis of Korean Dietary Life Adaptation of Married Female Immigrants
Jeong-Sook Lee
Korean Journal of Community Nutrition.2017; 22(2): 103. CrossRef

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[English]
A Study on the Perception as HANSIK (Korean Food) for the Common Dishes in Korean Adults Residing in Seoul and Metropolitan Area: Young Hee Park, Minji Kang, Hyun Wook Baik, Sang Woo Oh, Su Jin Park, Hee Young Paik, Jeong Sook Choe, Jin Young Lee, Min Sook Kang, Hyojee Joung; Korean J Community Nutr 2012;17(5):555-578. Published online October 31, 2012; DOI: https://doi.org/10.5720/kjcn.2012.17.5.555

Abstract PDF PubReader

This study was conducted to investigate which food items are perceived as HANSIK (Korean food) in Korea. 562 males and females aged 20-70 were surveyed on 512 most frequently consumed dish items from 4th Korean National Health and Nutrition Survey if they perceive it as HANSIK. Dish items in kimchi, namul - sukchae (cooked and seasoned vegetable) and jeotgal (salt-fermented food) category showed high response rate to be perceived as HANSIK. The response rate of twigim (frying foods) as HANSIK was low showing less than 70%. The response rate as HANSIK for foreign origin foods such as ramen and jjajangmyeon (black bean paste noodle) were lower than 25%. In jang . yangnyum (seasoning) category, doenjang (soybean paste) and gochujang (red pepper paste) showed high response rate as HANSIK more than 90%. Females showed a higher response rate as HANSIK than males for most food items except several items of myen . mandu (noodle and dumpling). The younger age group had higher HANSIK perception on many items of recently consumed foods, especially budae-jjigae (spicy sausage stew) (p < 0.001) and jwipo-jorim (braised dried filefish) (p < 0.001), implying that they already accept the common foods as HANSIK regardless of the origin. These results provide an information on the foods perceived as HANSIK among currently consumed common foods in Korea and these results can be utilized for establishment of HANSIK concept reflecting transition of dietary life in Korea.

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Consumption of Korean Foods with High Flavonoid Contents Reduces the Likelihood of Having Elevated C-Reactive Protein Levels: Data from the 2015–2017 Korea National Health and Nutrition Examination Survey
Dongwoo Ham, Shinyoung Jun, Minji Kang, Hee-Young Paik, Hyojee Joung, Sangah Shin
Nutrients.2019; 11(10): 2370. CrossRef
Consumption of Han-sik and its Association with Socioeconomic Status among Filipino Immigrant Women: the Filipino Women's Diet and Health Study (FiLWHEL)
Nayeon Kim, Minji Kang, Grace Abris, Sherlyn Mae P. Provido, Hyojee Joung, Sangmo Hong, Sung Hoon Yu, Chang Beom Lee, Jung Eun Lee
Korean Journal of Community Nutrition.2018; 23(6): 475. CrossRef
Shifts in Kimchi Consumption between 2005 and 2015 by Region and Income Level in the Korean Population: Korea National Health and Nutrition Examination Survey (2005, 2015)
Junghyun Park, Hae-Jeung Lee
Korean Journal of Community Nutrition.2017; 22(2): 145. CrossRef
University Students’ Eating Habit, Perception and Acceptance of Korean Food in Jeollabuk-do Province
Kyung Jin Min, Hwi-Jin Joung, Ye-Ji Lee, Moon Sook Kim, Il Sook Choi
Korean Journal of Food & Cookery Science.2017; 33(5): 588. CrossRef
Dietary assessment according to intake of Korean soup and stew in Korean adults: Based on the 2011~2014 Korea National Health and Nutrition Examination Survey
Yong-Suk Kwon, Gyusang Han
Journal of Nutrition and Health.2016; 49(5): 335. CrossRef
Needs Assessment for Dietary Education Program Focused on the Increase of HAN-SIK (Korean Food) Consumption in Children and Adolescents Living in Jeonbuk and Gyunggi Areas
Sang-Eun Lee, Yangsuk Kim, Eun Mi Ahn, Young Hwang, Young Kim
The Korean Journal of Community Living Science.2016; 27(S): 609. CrossRef
Estimated macronutrients and antioxidant vitamins intake according to Hansik consumption rate among Korean adults: Based on the Korea National Health and Nutrition Examination Survey 2007~2012
Seong-Ah Kim, Shinyoung Jun, Eunju Hong, Hyojee Joung
Journal of Nutrition and Health.2016; 49(5): 323. CrossRef
Nutrition knowledge, eating attitudes, nutrition behavior, self-efficacy of childcare center foodservice employees by stages of behavioral change in reducing sodium intake
Yun Ahn, Kyung Won Kim, Kyungmin Kim, Jinwon Pyun, Ikhyun Yeo, Kisun Nam
Journal of Nutrition and Health.2015; 48(5): 429. CrossRef
Assessment on Dietary Diversity According to Korean Dietary Pattern Score of Korean Adolescents and Children: Using 2007~2013 Korea National Health and Nutrition Examination Survey (KNHANES) Data
Yong-Suk Kwon, Yangsuk Kim
Korean journal of food and cookery science.2015; 31(5): 660. CrossRef
Development of Han-sik Database Utilizing an Expert Focus Group and Assessment of Han-sik Effects on Diet Quality
Minji Kang, Hyun Ju Jung, Hyojee Joung, Jae Eun Shim, Sang Eun Lee, Young-Hee Park, Hee Young Paik
Journal of the Korean Society of Food Culture.2014; 29(1): 9. CrossRef
Perception of common Korean dishes and foods among professionals in related fields
Sang Eun Lee, Minji Kang, Young-Hee Park, Hyojee Joung, Yoon-Kyoung Yang, Hee Young Paik
Korean Journal of Nutrition.2012; 45(6): 562. CrossRef

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[English]
Effects of School-based Nutrition Education for Korean Food Guide on Food Intake Frequency of Adolescents: Joung Sook Kim, Myoung Soon Park, Young Sun Cho, Joung Won Lee; Korean J Community Nutr 2005;10(5):582-591. Published online October 31, 2005

Abstract PDF: The purpose of this study was to examine the effect of nutrition education about the Korean food guide to middle school students on food intake measured by food frequency. Three hundred first graders were sampled from two coeducational middle schools located in the small city of Chungnam area, and divided into 167 (74 boys, 93 girls) education groups of one school and 133 (70 boys, 63 girls) non education groups of the other school. Nutrition education was given to the education group for a total of 16 hours and no education to the non education group during the same period. After education, average nutrition knowledge scores of education group increased from 6.40 +/- 2.17 to 6.81 +/- 1.56 significantly, especially boys with a high range of increase and girls no increase. Dietary habit scores improved significantly from 46.2 +/- 6.5 to 49.1 +/- 6.2 in both boys and girls of education group. Of the knowledge and dietary habits, ability of choosing a balanced meal, biased eating to some food, and taking diverse foods at every meal improved significantly in education group. In non education group no significant increases of either nutrition knowledge scores and dietary habit scores were shown. In addition education group showed significant increases after education, in the intake frequencies of rice noodle loaf bread, kimchi, green and yellow vegetables, and soybean soybean curds by 0.27, 0.23, 0.40 and 0.32 servings per day, compared with non education group. These changes were greater in girls than in boys. According to these results, it can be concluded that nutrition education about the Korean food guide improved effectively not only student's nutrition knowledge and dietary habits, but also healthy food intake ability. It is necessary to prepare long-term and continuous school-based nutrition education programs for the students to get into a habit of healthy food intake.

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