• Journal of Nutrition and Health
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• v.50 no.4
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• pp.361-375
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• 2017

Purpose: The purpose of this study was to investigate the nutritional status of 3~5 year old children attending kindergarten and childcare facilities in 2010 and 2014. Methods: Data were obtained from the 2010 and 2014 Korea National Health and Nutrition Examination Surveys (KNHANES) and included 509 subjects aged 3~5 years old attending kindergarten and childcare facilities. Results: In 2014, rate of skipping meals by children was 16.2%, an increase of 5.5% compared with the rate of skipping meals by children in 2010. Calcium intake in 2014 was 397.41 mg at 3 years old, 419.27 mg at 4 years old, and 414.01 mg at 5 years old. For the mean nutrient adequacy ratio (MAR) of subjects in 2010 and 2014, MAR at 3 years old (0.86) was significantly lower than those at 4 and 5 years old (0.90, 0.91) (p < 0.01). In 2010 and 2014, EAR intake at 3 years old (2.72) was significantly higher than those at 4 years old (2.14) and 5 years olds (1.92) (p < 0.01). Conclusion: As a result, compared with 2010 before establishment of the Children's foodservice management center, there was no improvement in the polarization of nutrient intake of children in 2014. Therefore, researchers believe that a continuous monitoring system developed by nutrition experts and children's foodservice management center are needed to improve the nutritional status of children. Of children between the ages of 3~5 years old, those with intakes under EAR were mostly 3 years old. Therefore, researchers suggest that the infant age group of KDRIs, which is classified as 1~2 years old and 3~5 years old, needs to be reestablished considering the growth and development of infants.

• The Journal of the Korean dental association
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• v.10 no.6
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• pp.347-349
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• 1972

The authors selected fifty children aged 2 to 4 years who had normal occlusion from the patients admitted at the Pedodontic Department in the Infirmary of Dental College, S.N.U. Study casts were taken and observed on the primate spaces and terminal planes which are characteristics of primary dentition. The results were as follows: 1. The percentages of terminal planes were 56%±7.02 in mesial step type, 38.0%±6.86 in straight step type, 6.0%±3.36 in distal step type, respectively. 2. The percentages of primate space were 80%±5.09 in maxillary dental arch and 5.0%±7.06 in mandibular dental arch. 3. The percentage of mesial step type in korean children was higher in comparison with that in foreign children and the percentage of the primate space was about the same in korean & foreign children.

• Korea journal of population studies
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• v.9 no.2
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• pp.42-52
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• 1986

An attempt had been made to obtain current information on induced abortion among currently married women aged 15 to 44. The source of data was 1985 National Fertility and Family Planning Survey conducted by Korea Institute for Population and Health in may 1985. 1. At the time of the survey, 53 percent of currently married women aged 15 to 44 had experienced induced abortion: 25.5 percent of the respondents who had experienced induced abortion only one time and another 27.6 percent more than two times. 2. The proportion of women who had experienced induced abortion seemed to increase according to the advance in age. It seemed that there was no significant difference in the experience rate of induced abortion by academic career, and there was inverse relationship between the experience rate of induced abortion and the age at first marriage. The experience rate if induced abortion by the number of living children was highest among those who had three children as 65.6 percent. 3. To analyze the effect of induced abortion on fertility, this study employed multiple regression analysis as a statistical technique. Instead of index representing fertility level the number of living children served as dependent variable. Independent variables used in analysis included age, age at first marriage, education level, ideal number of children, religion, frequency of induced abortion, total number of pregnancies and participation in labor force. Standardized partial regression coefficient of induced abortion was no less than -0.61. So, it can be concluded that induced abortion offered the great contribution on the birth control. A consistant health education and efficient management of family planning program would be essential for effectiveness of contraceptive practice.

• Clinical and Experimental Pediatrics
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• v.54 no.7
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• pp.298-303
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• 2011

Purpose: To evaluate the clinical characteristics of vitamin D deficiency and its association with iron deficiency anemia (IDA). Methods: A total of 171 children aged less than two years underwent 25-hydroxyvitamin $D_3$ tests between January 2007 and July 2009. The study was classified into two groups: normal and vitamin D insufficiency, by their vitamin 25-hydroxyvitamin $D_3$ levels. Results: In total, 120 children were in the normal group (mean age, body weight and heights $12.5{\pm}7.0$, $9.3{\pm}0.9$ kg and $76.8{\pm}1.1$ cm), and 51 children in the vitamin D insufficiency group ($9.9{\pm}5.4$ months, $9.0{\pm}0.9$ kg and $75.1{\pm}0.9$ cm). Vitamin D insufficiency was most commonly diagnosed in the spring (44%). The proportion of complete breast-feeding was higher in the insufficiency (92%), and 25.5% of the children in the deficient group also experienced IDA compared that 12% of normal group. Ten children in the insufficiency group experienced bony changes. Six children received calcitriol medication in the normal group, in whom the mean vitamin 25-hydroxyvitamin $D_3$ level increased from $39.6{\pm}14.6$ ng/mL (pre-medication) to $41.8{\pm}17.2$ ng/mL (post-medication), and 13 in the insufficiency group, in whom the mean vitamin 25-hydroxyvitamin $D_3$ increased from $20.7{\pm}7.0$ ng/mL to a mean post-treatment level of $43.7{\pm}23.8$ ng/mL. Conclusion: This study demonstrated that approximately 30% of children aged ${\leq}2$ years experienced vitamin D insufficiency associated with subclinical rickets. Many children also experienced concurrent IDA. Guidelines for vitamin D supplement in such children must therefore be established.

• Clinical and Experimental Pediatrics
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• v.60 no.5
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• pp.158-165
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• 2017

Purpose: To investigate the frequency of childhood sleep problems at pediatric clinics in Seoul and Gyeonggi provinces. Methods: Children (n=936) and their parents who visited 5 primary and 1 secondary pediatric outpatient clinics were invited to complete a Pediatric Sleep Questionnaire. Results: Among patients, 901 (96.3%) answered questionnaires in sufficient detail for evaluation. The participant's mean age was $4.35{\pm}3.02years$ (range, 0-18 years). The male to female ratio was 1:0.93 (466 boys, 435 girls). Habitual snoring (>3 day/week) was reported in 16.9% of the participants. The prevalence of habitual snoring in children <2 years and those between 2-5 years was 9% and 18%, respectively. Sleep disordered breathing was found in 15.1% (106 of 700) of children >2 years. Insomnia was reported in 13.2% of children. The prevalence of sleepwalking, night terrors, and bruxism, is 1.6%, 19%, and 21.1%, respectively. Snoring was associated with increased incidence of sleepwalking, night terrors, and bruxism. Age was associated with insomnia and habitual snoring (P<0.05). Insomnia was more prevalent in younger (21%) than in older children (6%). Snoring was more frequent in both preschool (34%) and school-aged children (33%). The frequency of sleep disordered breathing and insomnia did not vary significantly with gender. However, snoring was more prevalent in boys. Conclusion: Sleep problems are frequent among children in Korea. Children with snoring have an increased risk of sleepwalking, night terror, and bruxism. Primary clinicians should consider children's sleep habits to improve their health.

• Human Ecology Research
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• v.53 no.1
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• pp.67-80
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• 2015

This study aimed to develop a convergent arts and science program for 5yearold children and to evaluate this effectiveness of the program. To meet the purpose of this study, 34 children (aged, 5 year) were divided into two groups, namely the experimental group and the control group. To the experimental group, the creative arts and science convergence program of interest in this study was delivered over a period of 8 weeks. The children of the control group were delivered the Nuri Curriculum (standardized educational curriculum targeted for 3- to 5year olds) during the same experimental period. The levels of the children's creativity were assessed using the Torrance Test of Creative Thinking-Figural and those of their scientific inquiry ability were tested by using the Scientific Inquiry Ability Assessment Scale. The analysis of covariance calculated using by IBM SPSS ver. 21.0 revealed that the experimental group scored higher in creativity and scientific inquiry than did the control group. The results indicated that the proposed convergent arts and science program was effective in promoting creativity and scientific inquiry ability of young children. In this paper, along with the main results of this study, the implications for research and practice are discussed.

• The Journal of Pediatrics of Korean Medicine
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• v.12 no.1
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• pp.145-162
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• 1998

The purpose of this study was to determine the effects of oriental medical care on growth deficiency children. These cases were collected to investigate the effects of oriental medical care on growth deficiency children. So the cases were divided into 5 groups. The growth velocity was compared to a normal growth curve, and the results are as follows: 1. Oriental medical care was efficient when the epiphysial plates were not closed. 2. In female middle school beyond 1st grade students and in male middle school 3rd grade students who had almost closed epiphysial plates, the oriental medical care was not efficient and did not promote growth velocity. endothelium were used for the experiment using organ bath. 3. In the cases where the parent were very short, the effects of the oriental medical care to promote growth velocity was not efficient. 4. when we treated children of normal height, their growth velocity was over the normal growth curve. 5. In preschool aged children, oriental medical care was very efficient to promote children's growth. 6. The principle oriental medical care was to make balanced their body and digestive organs by using herb medicines that have the capability to promote the growth of the bones, and build strong muscles.

• Korean Journal of Child Studies
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• v.21 no.4
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• pp.5-19
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• 2000

This study investigated the relationship between the sociometric status(1) of a target child and the target child's most preferred peer, and (2) of the quality of their friendship between the two peers. Each of the subjects (238 boys, 6, 8, and 10 years of age) nominated 3 preferred peers answered questions about the preferred peers with the use of the Friendship Quality Scales. Results indicated that the sociometric status of children aged 8 and 10 were positively related to that of their most preferred peers. Reciprocal friendships, however, were more frequently observed among children in high sociometric status compared with those in low sociometric status. The quality of friendships among popular children was higher than that of rejected children. The quality of friendships between popular and rejected children was lower than friendship between rejected and rejected children.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.18 no.1
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• pp.10-16
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• 2015

Purpose: The aim of this study is to investigate the changing prevalence rate of Helicobacter pylori infection in children, of different age groups, with recurrent abdominal pain over a 10-year period. Methods: Children with recurrent abdominal pain who visited the pediatric outpatient clinic at university hospital were screened for H. pylori. Children were divided into 3 age categories of 4-5, 6-11, and 12-16 years. To study the changes in the annual prevalence rates of H. pylori infection, the study period was divided into 3 time periods: 2004-2007, 2008-2010, and 2011-2014. Urea breath test was performed for all children aged 4-16 years, with a cut-off value of 4.0‰ for children aged ${\geq}6$ years and 7‰ for children aged <6 years. Results: A total of 2,530 children (1,191 boys) with a mean age of $10.0{\pm}3.0years$ (range, 4.0-16.9 years) were included in the study. The total prevalence of H. pylori infection was 7.4% (187/2,530). The prevalence rate of H. pylori infection in children with recurrent abdominal pain was 8.0% (70/873) in 2004-2007, 7.7% (51/666) in 2008-2010, and 6.7% (66/991) in the 2011-2014. Nevertheless, a significant difference was observed in the prevalence rate between children <12 years old and ${\geq}12$ years of age (p=0.018). Conclusion: The prevalence of H. pylori infection in Korean children with recurrent abdominal pain was 7.4%, showing no significant decrease in the last 11 years; however, the prevalence rate in children <12 years old was significantly lower than that in those ${\geq}12$ years old.

• Journal of Environmental Health Sciences
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• v.31 no.6
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• pp.475-482
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• 2005

This study aimed to determine the fluoride intakes in 120 preschool children aged 3 to 6 residing in Jumunjin (community water fluoridation area) and Gangneung (non-fluoridation area). The parents were asked to collect 24-hour urine samples and to duplicate the samples of all the diets that their children ingested in the day of urine collection. The acid-diffusible fluoride in the food and non-carbonate beverages were isolated by the acid-diffusion technique and then measured with a fluoride electrode. The fluoride in carbonate beverages, drinking waters and urine samples were measured directly with a fluoride electrode. The geometric mean (geometric standard deviation) of daily fluoride intakes from all kinds of diet was 5.99 (2.27) $\mu$g/kg/day in the children in Gangneung and that of the children in Jumunjin was 18.36 (2.69). The amount of fluoride intake by food and drinking water in fluoridation area were significantly larger than that in non-fluoridation area but the statistical difference of fluoride intake by beverages between two areas was not observed. The GMs (GSDs) of daily fluoride excretion by urine of children in non-fluoridation area and in fluoridation area were 8.39 (1.73) and 18.62 (1.77) $\mu$g/kg/day, respectively. The correlation between fluoride intake from diet excluding beverage and urinary excretion was statistically significant. It is concluded that the amount of fluoride intake of children living in fluoridation area did not exceed the upper intake level to avoid the risk of dental fluorosis (2.2 mg/day in 4- to 8-year-olds) and urinary excretion of fluoride was good indicator of fluoride intake from diets.