Korean Journal of Community Nutrition

Original Articles

[English]
Dietary Life, Vitamin D Status and Blood Clinical Indices of University Laboratory Workers: Jung Hyun Hwang, Hong Mie Lee, Jung Hee Kim; Korean J Community Nutr 2019;24(3):245-256. Published online June 30, 2019; DOI: https://doi.org/10.5720/kjcn.2019.24.3.245

Abstract PDF PubReader: OBJECTIVES
Although the number of laboratory workers is constantly increasing every year, few studies have been conducted on the health and nutritional status of these research workers. This study determined the health status of laboratory workers by analyzing their anthropometric indices, dietary life, vitamin D status and blood clinical indices.
METHODS
The subjects consisted of 100 female laboratory workers. This study investigated their diet, anthropometric indices, vitamin D status and blood clinical indices. The subjects were divided into two groups according to their duration of working in a laboratory (<1 year,â‰¥1 year).
RESULTS
The average age and body mass index (BMI) of subjects were 23.18 years and 21.51 kg/m2, respectively Those subjects with over 1 year employment (â‰¥1 year) had a significantly higher waist-hip ratio than that of the subjects with the less than 1 year employment (<1 year). The mean serum vitamin D level of all the subjects was 10.04 ng/mL, which is close to a level of vitamin D deficiency. There was a significantly higher average intake of calories in the over 1 year employment group as compared to that of the less than 1 year employment group. The frequency of eating sweet snacks was significantly higher for the over 1 year employment group. The correlation analysis showed a significant positive correlation between the serum 25-(OH)-vitamin D level and the time of exposure to sunlight, while dietary intake of vitamin D did not show correlation with the serum 25-(OH)-vitamin D level. However, the serum 25-(OH)-vitamin D level was also negatively correlated with both the percentage of body fat and visceral fat.
CONCLUSIONS
Laboratory workers are a very high risk group in terms of their nutritional status of vitamin D. Therefore, they need greater time of exposure to sunlight as well as increasing their dietary consumption of vitamin D. In addition, it is important for laboratory worker to practice regular and balanced dietary habits in order to maintain a healthy life.

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[English]
The relationship between Physical Growth and Major Sources of Serum Vitamin D among Hospitalized Children of Changwon City: Haeyoung Kang, Eunsil Her, Kyung Hea Lee; Korean J Community Nutr 2015;20(3):197-207. Published online June 30, 2015; DOI: https://doi.org/10.5720/kjcn.2015.20.3.197

Abstract PDF PubReader: OBJECTIVES
This study was conducted to investigate the effects of the sources of vitamin D (duration of exposure to sunlight, intake of major food sources for vitamin D or vitamin D supplements) on the serum 25-(OH) D3 levels, and the physical growth of a child.
METHODS
Subjects were 296 children aged 1 to 5 years who visited S hospital located in Changwon City. Survey data collection was carried out by direct interview method, and the biochemical data were collected using hospital records.
RESULTS
The study subjects were divided into three groups according to their levels of serum 25-(OH) D3 (deficient, relatively insufficient, sufficient) and their percentage were 48.3%, 44.3% and 7.4% respectively. The average concentration of serum 25-(OH) D3 was 20.41 +/- 6.55 ng/mL, which was relatively insufficient. The average duration of exposure to sunlight was 58.86 +/- 49.18 minutes/day. A total score of vitamin D major food sources was 46.71 points (full marks 153), and the most frequently consumed food items were milk, eggs, and cheese. Thirty-four percent of the subjects took vitamin D supplements and their dose were 11.96 microg/day. Three vitamin D sources in sufficient group were higher than deficient or relatively insufficient group significantly. Intake of vitamin D supplements showed positive relation (+) and high explanation power (R2= 0.288) on serum 25-(OH) D3 concentration, but intake of vitamin D major food sources (+) and the duration of exposure to sunlight (+) had a low explanation power (R2= 0.068). The relations between serum 25-(OH) D3 concentration and physical growth (height and weight) were shown as negative (??, and their explanation powers were low as 7.3% and 5.9% respectively.
CONCLUSIONS
This study results can be useful when discussing the intake standard of vitamin D and the effective intake method for children. In addition, it will be helpful to build the children's nutrition policy and to plan the nutrition education program to improve the vitamin D status in children.

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[English]
Vitamin D intake, Outdoor Activity Time and Serum 25-OH Vitamin D Concentrations of Korean Postmenopausal Women by Season and by Age: Jin Sook Yoon, Min Kyoung Song; Korean J Community Nutr 2015;20(2):120-128. Published online April 30, 2015; DOI: https://doi.org/10.5720/kjcn.2015.20.2.120

Abstract PDF PubReader

OBJECTIVES
The purpose of this study was to examine the relative impact of seasonal differences and age on dietary vitamin D intakes, outdoor activity time and serum vitamin D status among Korean postmenopausal women.
METHODS
A cross-sectional study was conducted with 164 free-living postmenopausal women (mean age=55.4 years) in Daegu, Korea. Dietary intake, daily physical activity patterns and fasting blood samples were collected during summer and winter. We compared the results from 75 women during summer and 89 women during winter. Dietary intake of vitamin D was assessed by 24-hour recall method. Daily outdoor activity time was derived from physical activity diary.
RESULTS
The average dietary intake of vitamin D of the participants was 3.7 microg during summer, 3.3 microg during winter, showing no significant difference between the two seasons. The average time spent on outdoor activities was not significantly different between summer (=35.1 +/- 75.0 min/d) and winter (=48.5 +/- 76.8 min/d). The average serum 25-(OH) vitamin D concentrations of participants was 17.5 +/- 7.5 ng/mL in the summer and 13.4 +/- 4.3 ng/mL in the winter, showing no significant differences by season. Dietary intake of vitamin D was not related to age. When total subjects were divided into two groups by age, the average serum 25-(OH) vitamin D concentration was significantly higher in older group (p=0.047) and time spent on outdoor activities was also (p=0.018) significantly higher in the older group.
CONCLUSIONS
In order to improve the current vitamin D status of Korean postmenopausal women, nutrition education programs should focus more on adequate intake of vitamin D, while maintaining enough outdoor activities over the season.

Citations

Citations to this article as recorded by

Vitamin D intake and bone mineral density in Korean adults: analysis of the 2009–2011 Korea National Health and Nutrition Examination Survey
Hyejin You, Hye Ran Shin, SuJin Song, Sun Yung Ly
Nutrition Research and Practice.2022; 16(6): 775. CrossRef
Differences in serum ferritin and vitamin D levels of Korean women with obesity and severe obesity
Nan Hui Kang, Ji Sook Park, Hongchan Lee, Jung-Eun Yim
Journal of Nutrition and Health.2020; 53(4): 381. CrossRef
Cardiorespiratory Fitness is Inversely Associated with Risk of Low Bone Mineral Density in Older Korean Men
Inhwan Lee, Jeonghyeon Kim, Hyunsik Kang
International Journal of Environmental Research and Public Health.2020; 17(21): 7907. CrossRef
Association between vitamin D deficiency and anemia among Korean adolescent girls and young women
Haeun Jang, Seonghee Park, Kyong Park
Journal of Nutrition and Health.2019; 52(6): 552. CrossRef
Sex- and age group-specific associations between intakes of dairy foods and pulses and bone health in Koreans aged 50 years and older: Based on 2008~2011 Korea National Health and Nutrition Examination Survey
Hyun-Bi Seo, Young-Sun Choi
Journal of Nutrition and Health.2016; 49(3): 165. CrossRef

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[English]
Seasonal Differences in Outdoor Activity Time and Serum 25-(OH) Vitamin D Status of Korean Young Women: Jin Sook Yoon, Min Kyoung Song; Korean J Community Nutr 2014;19(3):231-240. Published online June 30, 2014; DOI: https://doi.org/10.5720/kjcn.2014.19.3.231

Abstract PDF PubReader

OBJECTIVES
This study was intended to examine the seasonal differences in outdoor activity times and dietary vitamin D intakes, and explicates their relative impact on improving serum 25-(OH) vitamin D status among Korean young women.
METHODS
A cross-sectional study was conducted with 135 free-living women aged 19-39 years in Daegu-Kyungbook, Korea. We compared the results from 52 women for the summer and 83 women for the winter. Dietary intake of vitamin D was assessed by 24 hour recall method for non-consecutive three days as well as by food frequency method. Daily outdoor activity times were derived from 24 hour physical activity diary.
RESULTS
The average dietary intake of vitamin D of the participants by 24 hour recall method was 3.1 microg during the summer, 3.3 microg during the winter, showing no significant difference between the two seasons. Times spent on outdoor activities (p < 0.01) in the summer (= 23.8 +/- 23.6 min) were much longer than that in the winter (= 10.8 +/- 13.4 min). The serum 25-(OH) vitamin D levels of participants were 17.5 +/- 7.5 ng/mL in the summer and 13.4 +/- 4.3 ng/mL in the winter, showing that the latter was significantly lower than that of the former (p < 0.001). The serum 25-(OH) vitamin D levels of subjects were positively related to outdoor activities (r = 0.315, p < 0.05) during the summer, while related to dietary intake (r = 0.252, p < 0.05) during the winter.
CONCLUSIONS
In order to improve the current vitamin D status of Korean young women, nutrition education programs should focus on increasing more dietary intake especially during the winter, and performing more outdoor activities in other seasons.

Citations

Citations to this article as recorded by

Vitamin D intake, Outdoor Activity Time and Serum 25-OH Vitamin D Concentrations of Korean Postmenopausal Women by Season and by Age
Jin-Sook Yoon, Min-Kyoung Song
Korean Journal of Community Nutrition.2015; 20(2): 120. CrossRef
The relationship between Physical Growth and Major Sources of Serum Vitamin D among Hospitalized Children of Changwon City
Haeyoung Kang, Eunsil Her, Kyung-Hea Lee
Korean Journal of Community Nutrition.2015; 20(3): 197. CrossRef
Association between serum vitamin D and depressive symptoms among female workers in the manufacturing industry
Soon Il Kwon, Jun Seok Son, Young Ouk Kim, Chang Ho Chae, Ja Hyun Kim, Chan Woo Kim, Hyoung Ouk Park, Jun Ho Lee, Jun Ick Jung
Annals of Occupational and Environmental Medicine.2015;[Epub] CrossRef

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[English]
Associations between Serum 25-hydroxyvitamin D and Consumption Frequencies of Vitamin D Rich Foods in Korean Adults and Older Adults: Areum Yu, Jihye Kim, Oran Kwon, Se Young Oh, Junghyun Kim, Yoon Jung Yang; Korean J Community Nutr 2014;19(2):122-132. Published online April 30, 2014; DOI: https://doi.org/10.5720/kjcn.2014.19.2.122

Abstract PDF PubReader

OBJECTIVES
This study was conducted to investigate the vitamin D status and to determine the association between serum 25-hydroxyvitamin D [25(OH)D] concentrations and consumption frequencies of vitamin D rich foods in Korean adults and older adults.
METHODS
Subjects were 10,374 adults and 2,792 older adults participating in the 2008-2009 Korea National Health and Nutrition Examination Survey (KNHANES). Consumption frequencies of vitamin D rich foods were estimated by using a qualitative food frequency questionnaire (FFQ). Eleven food items such as beef, egg, mackerel, tuna, yellow corvina, pollack, anchovy, mushroom, milk, yogurt, and ice cream were selected as vitamin D rich foods based on previous research.
RESULTS
The proportions of deficiency (< 12 ng/mL), inadequacy (12-20 ng/mL) and sufficiency (> or = 20 ng/mL) of serum 25(OH)D concentrations from June to November and December to May in adults were 8.8%, 42.3%, 48.8%, and 28.2%, 52.8%, 19.1%, respectively. The proportions of deficiency, inadequacy and sufficiency of serum 25 (OH)D concentrations from June to November and December to May in older adults were 10.1%, 32.4%, 57.5%, and 24.1%, 45.4%, 30.5%, respectively. The mean serum 25(OH)D concentrations in adults were positively related to the consumption frequencies of mackerel, anchovy, all fish, milk and milk.dairy products. The mean serum 25(OH)D concentrations in older adults were positively related to the consumption frequencies of yellow corvina and negatively related to the consumption frequencies of ice cream.
CONCLUSIONS
Our results suggest that Korean adults were more deficient in serum 25(OH)D concentrations than older adults. The consumption of vitamin D rich foods may affect vitamin D status in Korean adults. Further studies are required to confirm these findings.

Citations

Citations to this article as recorded by

Discovering Vitamin-D-Deficiency-Associated Factors in Korean Adults Using KNHANES Data Based on an Integrated Analysis of Machine Learning and Statistical Techniques
Hongryul Ahn, Seungwon Kim, Jinmyung Jung, Chan Park
Nutrients.2025; 17(4): 618. CrossRef
Estimated dietary vitamin D intake and major vitamin D food sources of Koreans: based on the Korea National Health and Nutrition Examination Survey 2016–2019
Ki Nam Kim, Jung-Sug Lee, Jee-Seon Shim, Mi Ock Yoon, Hyun Sook Lee
Nutrition Research and Practice.2023; 17(3): 451. CrossRef
Impacts of serum vitamin D levels on sleep and daytime sleepiness according to working conditions
Hyuk Joo Lee, Hayun Choi, In-Young Yoon
Journal of Clinical Sleep Medicine.2020; 16(7): 1045. CrossRef
Serum 25-hydroxyvitamin D and cognitive function in Korean older adults living in rural area
Ye Som Shin, Bo Youl Choi, Mi Kyung Kim, Yoon Jung Yang
Journal of Nutrition and Health.2019; 52(5): 465. CrossRef
Vitamin D intake, serum 25OHD, and bone mineral density of Korean adults: Based on the Korea National Health and Nutrition Examination Survey (KNHANES, 2011)
Mi-Yeon Kim, Mi-Ja Kim, Sun Yung Ly
Journal of Nutrition and Health.2016; 49(6): 437. CrossRef
Relationship of vitamin D status and obesity index in Korean women
Ji-Young Park, Young-Ran Heo
Journal of Nutrition and Health.2016; 49(1): 28. CrossRef
The relationship between Physical Growth and Major Sources of Serum Vitamin D among Hospitalized Children of Changwon City
Haeyoung Kang, Eunsil Her, Kyung-Hea Lee
Korean Journal of Community Nutrition.2015; 20(3): 197. CrossRef

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[English]
Relationships among Serum Adiponectin, Leptin and Vitamin D Concentrations and the Metabolic Syndrome in Farmers: Seo Eun Yeon, Hee Ryoung Son, Jung Sook Choi, Eun Kyung Kim; Korean J Community Nutr 2014;19(1):12-26. Published online February 28, 2014; DOI: https://doi.org/10.5720/kjcn.2014.19.1.12

Abstract PDF PubReader

The purpose of this study was to investigate the relationships among serum adiponectin, leptin and vitamin D concentrations and the metabolic syndrome in Korean farmers. 105 (26 males, 79 females) farmers (39~78 years, mean age 59.4 +/- 9.6 years) in Gangwon - area were included in this study. Anthropometric measurements and biochemical blood analysis of subjects were carried out. The prevalence of obesity, abdominal obesity, hypertension, diabetes, hypertriglyceridemia, hypercholesterolemia and hyper LDL-cholesterolemia, metabolic syndrome were 51.9%, 65.7%, 49.5%, 15.3%, 17.3%, 13.5%, 11.5% and 40.9%, respectively. Serum adiponectin and leptin levels (8.90 microg/ml and 12.6 ng/ml) of females were significantly higher than those (6.49 microg/ml and 4.88 ng/ml) of males. But there was no significant difference in 25(OH)vitamin D concentration between males (15.4 ng/ml) and females (16.9 ng/ml). In the subjects with metabolic syndrome, the adiponectin levels were significantly lower and leptin levels were significantly higher than those of the subjects without metabolic syndrome. Serum adiponectin level had positive correlations with HDL-cholesterol level (r = 0.325, p < 0.001), but showed negative correlations with triglyceride and fasting blood glucose concentrations, body weight and waist/hip circumference ratio (r = -0.202 ~ -0.317, p < 0.05). Serum leptin and 25(OH)vitamin D concentrations were positively correlated with body fat (kg, %) and BMI, waist and hip circumferences (r = 0.244 ~ 0.682, p < 0.001). The results of this study suggested that adiponectin and leptin levels could be credible indices to predict chronic diseases in farmers. However, further research on vitamin D should be carried out considering another factors.

Citations

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Association of Serum Adiponectin Biomarker with Metabolic Syndrome Components in Koreans with Extremely High HDL Cholesterol Levels in General Health Checkup
Hyun Suk Yang, Gun-Hyuk Lee, Donghwan Kim, Kyeong Ryong Lee, Mina Hur
Metabolites.2022; 12(11): 1086. CrossRef
The Measurements of the Resting Metabolic Rate (RMR) and the Accuracy of RMR Predictive Equations for Korean Farmers
Hee-Ryoung Son, Seo-Eun Yeon, Jung-Sook Choi, Eun-Kyung Kim
Korean Journal of Community Nutrition.2014; 19(6): 568. CrossRef

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[English]
Association of Calcium Intake and Bone Mineral Density by Vitamin D Receptor Genotype among Elderly Women Living in Rural a Area: Ji Sun Kim, Hee Seon Kim; Korean J Community Nutr 2006;11(4):534-540. Published online August 31, 2006

Abstract PDF: Recent studies have shown that environmental, biochemical, nutritional or genetic factors affect bone mineral density (BMD). The purpose of the present study was to investigate the effect of vitamin D receptor (VDR) gentotype and nutritional status on BMD of elderly women living in a rural area. Three hundred thirty five elderly women over 65 years in Asan participated the study. Data for demographic and nutrient intakes were obtained by survey with a two day 24 hr recall method. BMD was measured by broadband ultrasound attenuation (BUA) using quantitative ultrasound (QUS). VDR genotypes of the subjects analyzed with Bsm I restriction enzyme were bb (92%), Bb (7%) and BB (1%). No differences were found between genotypes bb and Bb/BB in age, menopausal age, body mass index and body fat. BUA of bb genotype was higher (62.5 +/- 15.6 dB/MHz) than Bb/BB genotype (56.1 +/- 17.6 dB/MHz) by Student's t-tests. Correlation analyses showed strong negative correlation of BMD and age, but positive correlation with BMI, energy and calcium intake. When subgroup analyses were conducted after stratification by the median calcium intake level (412.9 mg/d), the above median calcium intake group showed significant difference in BUA by VDR genotype while the lower median calcium intake group did not show significant difference. The current study confirmed interaction of calcium intake and VDR genotype in association with BMD. Further nutritional intervention will be needed to improve calcium status of the elderly women living in rural areas.

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[English]
Serum 25-Hydroxyvitamin D Status and Associated Factors in Premenopausal Working Women: Hwa Jae Lim; Korean J Community Nutr 2005;10(1):79-90. Published online February 28, 2005

Abstract PDF: This study was performed to estimate serum 25-hydroxyvitamin D level and to evaluate the relationship between serum 25-hydroxyvitamin D level and associated factors. The subjects were 61 premenopausal working women aged 30 - 49 y in Busan. The serum 25-hydroxyvitamin D level was measured by radioimmunoassay. Data for physiological characteristics, lifestyle factors, physical activity and nutrient intake were assessed by questionnaire including information about outdoor activity time, daily activity diary and 24 hr recall method. The mean vitamin D intake was 3.12 ug, which corresponded to 62.5% of the Korean RDA. The mean level of serum 25-hydroxyvitamin D was 31.0 ng/mL. Low 25-hydroxyvitamin D (<25 nmol/L) was not found in the subjects. The serum 25-hydroxyvitamin D level showed positive significant correlations with exercise hours, daily energy expenditure, hours of outdoor activity per weekdays (p< 0.001, p< 0.05, p< 0.05). Exercise hours were found to be the most important determinant of serum 25-hydroxyvitamin D level. Therefore nutritional education for increasing hours of physical activity including indoor and outdoor exercise, is needed for premenopausal working women to increase vitamin D status.

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[English]
A Survey on the Consumption and the Perception of Mushrooms and Mushroom Dishes among Koreans: Hae Sook Oh, Hee Ok Park, Sun Yoon; Korean J Community Nutr 2002;7(2):245-256. Published online April 30, 2002

Abstract PDF: This study was carried out to examine Koreans preference in mushrooms, their nutritional knowledge of mushrooms as a source of Vitamin D, and five characteristics of six dishes consisting of common dishes and mushroom dishes. The data were collected from 2,777 subjects in various age ranges by means of a survey questionnaire. Variables, such as age, gender, diet quality and the degree of interest in diet were significant factors considered in relation to preference of mushrooms. Adults ate mushrooms because of their healthfulness, but this attibute was not a factor among adolescent students. The level of nutritional knowledge was relatively low and the ratio of "do not know" responses was higher than the ratio of "yes" or "no" . Generally, housewives, elementary school children and those who were healthy, ate floods because of health consciousness, and those who preferred mushrooms had better dietary habits. The characteristics of mushroom dishes, both as main and side dishes, had much more correlation with the factors considered for the subjects than the common dishes and one dish meals, respectively. Dietary altitudes, such as mushroom preference, frequency of mushroom intake and level of nutritional knowledge, were strongly correlated with the characteristics of the six dishes. It has been shown that mushroom dishes were recognized as nutritional, rather than delicious.

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