• Journal of Preventive Medicine and Public Health
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• v.17 no.1
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• pp.145-172
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• 1984

In order to assess the physical growth pattern of Korean Youth, the authors measured the body height, body weight, chestgirth and sitting height of 40967 persons (24832 males and 16135 females) from primary schools, middle and high schools and colleges of metropolitan (urban) and rural areas, and calculated the mene, standard deviation, standard error and coefficient variance of the body weight chestgirth, sitting height and various pertinent index by body height to demonstrate the standard physical growth and development by body height of sex and age. The following conclusions were obtained. 1. Physical growth and development: Rapid growth of physical growth in terms of body height has been observed among males in the age $7{\sim}15$ and among female $7{\sim}13$. Growth in terms of body height turned out to be slower among students of higher age by both sexes. The age of cross over between to sexes is between 10 to 13 years where upon girls out grows boys. Maximum annual growth were upon girls out grows boys. Maximum annual growth were both of 6.16cm from 8 to 9 years old and 12 to 13 years old for boys and 7.2cm from 8 to 9 and 6.1cm from 9 to 10 for girls. This indicates that girls enter a rapidly growing stage 2 years earlier than boys. Meanwhile, prominent improvement in body height of national students over period of ten year was noticed. 2. The distribution status of body height by age: The distribution status of body height by age were as follows; 7 year of age: boys-30cm range of body height from 104.0cm to 133.9cm, girls-27cm from 104.0cm to 130.9cm 8 year of age: boys-30cm from 116.0 to 145.9cm girls-33cm from 113.0 to 145.9cm 9 year of age: boys-30cm from 116.0 to 145.9cm girls-33cm from 113.0 to 145.9cm 10 year of age: boys-39cm from 116.0 to 154.9cm girls-39cm from 119.0 to 157.9cm 11 year of age: boys-45cm from 119.0 to 163.9cm girls-39cm from 122.0 to 160.9cm 12 year of age: boys-45cm from 125.0 to 169.9cm girls-42cm from 125.0 to 166.9cm 13 year of age: boys-45cm from 128.0 to 172.9cm girls-42cm from 128.0 to 169.9cm 14 year of age: boys-48cm from 131.0 to 178.9cm girls-36cm from 134.0 to 169.9cm 15 year of age: boys-42cm from 137.0 to 181.9cm girls-33cm from 137.0 to 169.9cm 16 year of age: boys-39cm from 146.0 to 184.9cm girls-30cm from 143.0 to 172.9cm 17 year of age: boys-39cm from 146.0 to 184.9cm girls-27cm from 143.0 to 169.9cm 18 year of age: boys-36cm from 152.0 to 187.9cm girls-27cm from 146.0 to 172.9cm 19 year of age: boys-30cm from 155.0 to 184.9cm girls-24cm from 146.0 to 169.9cm 20 year of age: boys-24cm from 158.0 to 181.9cm girls-l8cm from 149.0 to 166.9cm 3. Standard values of body weight, chest-girth and sitting height by body height of age were found all age groups from 7 to 20 years old and listed in tables from3-a to 16-a. 4. Standard values of relative body weight, relative chestgirth and relative sitting height by body height of age were found all age groups from 7 to 20 years old and listed in tables from 3-b to 16-b. 5. Standard values of physical and nutritional indices (Rohrer index, Kaup index, Vervaeck index and Pelidisi index) by body height of age were found all age groups from 7 to 20 years old and listed in tables from 3-c to 16-c.

• Journal of the Korean Home Economics Association
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• v.51 no.2
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• pp.219-228
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• 2013

The major purpose of this study was to explore the relation of a child's need for approval, anxiety and anger-in on a child's relational aggression according to gender. The study's participants included 464 boys and girls selected from fifth-and sixth-graders at an elementary school in Busan. A child's need for approval, anxiety, anger-in and relational aggression were assessed with their own self-reports. For data analysis, Cronbach ${\alpha}$, T-test, Pearson correlation coefficients, and Multiple Regression were used. The collected data was analyzed by the SPSSWIN 18.0 program. The major findings were as follows: First, child's anger-in demonstrated a significant difference among sexes. Girls indicated higher points than boys. Second, Boys' need for approval indirectly affected child's relational aggression through anger-in. Boys' anger-in was directly affected by relational aggression. Boys' anxiety was directly affected by anger-in. And boys' anxiety indirectly affected child's relational aggression through anger-in. Third, Girls' anxiety was directly affected by relational aggression. Need for approval and anxiety were directly affected by anger-in. The findings from this study indicates that child's need for approval, anxiety and anger-in are important elements in relational aggression are affected differently depending on the child's gender. Also, this study has meaning in that it can be used as fundamental data to develop a teaching plan and counseling program for children that can decrease relational aggression.

• Clinical and Experimental Pediatrics
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• v.59 no.2
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• pp.65-73
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• 2016

Purpose: Only a few studies have explored nationwide trends in lipid profiles among Asian adolescents. We aimed to assess trends in lipid profiles and the associated lifestyle factors among Korean children. Methods: We analyzed data for 2,094 adolescents who were aged 10-18 years and had participated in the Korea National Health and Nutrition Examination Surveys in 1998 and 2010. Results: During 1998-2010, the prevalence of obesity significantly increased in boys, but no changes were observed in girls. Over this period, there was a small but significant decrease in the mean lowdensity lipoprotein (LDL)-cholesterol level in boys (1998, 87.5 mg/dL; 2010, 83.6 mg/dL; P=0.019) and mean triglyceride levels in girls (1998, 90.8 mg/dL; 2010, 85.8 mg/dL; P=0.020). There were no significant changes in the prevalence of dyslipidemia in boys, but a modest decrease was noted in girls (1998, 25.1%; 2010, 18.3%; P=0.052). During the study period, the prevalence of breakfast skipping decreased, whereas that of regular exercise increased in both groups. Daily total energy intake did not change between these years. In multivariable logistic regression analyses, breakfast skipping was associated with increased risk of hyper-LDL-cholesterolemia in boys (odds ratio [OR], 5.77) and hypertriglyceridemia (OR, 2.27) in girls. Regular exercise was associated with decreased risk of hypo-HDL-cholesterolemia (OR, 0.40) in boys. Conclusion: Although the prevalence of obesity in boys increased, favorable or constant trends in lipid profiles were observed among Korean adolescents during 1998-2010. Decrease in breakfast skipping and increase in regular exercise may have contributed to these trends.

• Journal of Families and Better Life
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• v.30 no.3
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• pp.179-192
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• 2012

The purpose of this study is to investigate the variable factors influencing children's interpersonal relationship skills and analyze the effects of marital perspective-taking ability, managing responses of young children and emotional intelligence on the interpersonal relationship skills of children. The study subjects were young children aged from four to seven attending private kindergartens or public day care centers in Seoul or Kyeongki-do and their mothers. The results are as follows : 1) First, marital perspective-taking abilities were indicated higher on boys than girls, children in a full-day program than those in a half-day program, university graduates or higher degree holders than collage graduates, single-income families than double-income families. In case of managing responses of young children, boys showed high avoidance of offensive disposition and girls showed high emotions dissipation. Also, young children in a full-day program showed non-responses on managing responses but high responses on emotions dissipation, and children of mothers with bachelor's degree or higher education showed support and children from double-income family showed no responses in high. Moreover, emotional intelligence of young children in a full-day program was higher than that of children in a half-day program, interpersonal relationship skills were showed higher on girls than boys, half-day children than full-day ones, children from single-income family than those from double-income family. 2) Meaningful relationships were indicated between these variables; managing responses of young children, emotional intelligence and interpersonal relationship skills by partly showing correlations. 3) Children in a half-day program with low in emotions dissipation, non-responses, offensive dispositional managing responses but high on Avoid, emotional intelligence showed high interpersonal relationship skills.

• Journal of the Korean Society of Clothing and Textiles
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• v.37 no.4
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• pp.598-617
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• 2013

This study analyzes the body sizes of young boys in order to categorize a sizing system for middle and high school uniforms. The study was based on the $6^{th}$ National Anthropometric Survey (Size Korea 2010) data. The sample size consisted of 2,317 boys between the ages of 13 and 18 years. Most measurement items increased significantly relative to age and there was rapid growth between the ages of 13 and 14 years. The growth for the chest and hip was more than the waist. The drop value 1 (difference between chest circumference and waist circumference) and the drop value 2 (difference between hip circumference and waist circumference) increased remarkably from the age of 13 to the age of 15. Therefore, the waist size decreased and chest and hip became wider relative to the age increase. Middle school students had a smaller chest and hip circumference than high school students in the comparative body measurement results for middle school students (13-15 years) and high school students (16-18 years) of the same height group. The somatotype of high school students showed a long trunk length, broad chest and shoulder.

• Korean Journal of Child Studies
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• v.31 no.2
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• pp.209-227
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• 2010

This study examined the relationship among parenting behaviors, children's perfectionism and achievement motivation, using a sample of 338 fifth and sixth graders. The participants completed questionnaires on parenting behaviors and their perfectionism and achievement motivation. Data were analyzed by factor analyses and multiple regression analysis. Both boys and girls had higher achievement motivation when they perceived higher parental levels of acceptance, and girls showed higher achievement motivation when they perceived higher maternal control/over-expectation. Boys who exhibited self-oriented and socially prescribed perfectionism and girls who exhibited self-oriented perfectionism showed higher achievement motivation. Boys had higher self-oriented and socially prescribed perfectionism when perceiving higher parental acceptance and control/over-expectation. Girls showed higher self-oriented perfectionism when perceiving higher parental acceptance and control/over-expectation, and they showed higher socially prescribed perfectionism when perceiving higher paternal control/over-expectation and maternal acceptance and control/over-expectation. It was revealed that both boys' and girls' perfectionism tended to play mediating roles between parenting behaviors and achievement motivation.

• Journal of Families and Better Life
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• v.24 no.5 s.83
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• pp.239-249
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• 2006

The main purpose of this study was to examine the relations of children's shyness and maternal involvement in children's peer relations to children's social competence, and the relative influence of children's shyness and maternal involvement in children's peer relations on children's social competence. 195 mothers of 3-year-olds and their 13 teachers in Seoul and Gyeonggi province participated in the study. The data were obtained using three kinds of questionnaires regarding shyness, parental involvement, and social competence. Findings revealed that shy children showed less popularity leadership and social participation for both boys and girls. The more orchestrations mothers exerted, the more popularity leadership boys showed. And the more advice and support mothers provided, the more interpersonal adjustment girls showed. For boys, shyness was more influential on popularity leadership than maternal orchestrations were. Findings are discussed in terms of the role of shyness in children's early social competence for both boys and girls.

• Journal of Nutrition and Health
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• v.43 no.5
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• pp.475-488
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• 2010

The daily caffeine intake from elementary school children's favorite foods was surveyed and evaluated. Children may respond to caffeine differently from adults because they have different physiological makeup and are functionally immature. Therefore, caffeine exposure may have more serious consequences for children than for adults, irrespective of sensitivity. Their preference, perception, and intake of caffeine from children's favorite foods were investigated by questionnaire for 355 children. The order of children's preference over foods containing caffeine was ice cream and ices, confectionary, milk and milk products, and soft beverage. The daily caffeine intake of children was estimated to range from 0.16 to 917.28 mg/day, with an average of $36.04\;{\pm}\;82.7$ mg/day and $36.9\;{\pm}\;96.0$ mg/day for boys and girls, respectively. The daily caffeine intake according to body weight was $1.08\;{\pm}\;2.23$ mg/kg and $1.12\;{\pm}\;2.66$ mg/kg for boys and girls, respectively. The percentage of acceptable daily intake (ADI) of caffeine was 43.4% for boys and 44.9% for girls. The sources of caffeine for boys and girls were soft beverage (18.3 mg and 16.1 mg), milk and milk products (8.9 mg and 8.5 mg), ice cream and ices (5.7 mg and 7.3 mg), chocolate (1.6 mg and 3.2 mg), and confectionery (1.6 mg and 1.8 mg).

• The Korean Journal of Community Living Science
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• v.24 no.3
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• pp.355-368
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• 2013

This research was performed for examining the differences of experience of sex education and the awareness of sexual abuse according to child's sex and economic background. Also the differences of sex knowledge and sexual consciousness were analyzed according to child's sex, economic background and sex education. Subjects were 425 children from two elementary schools and 10 community child centers in H city, Gyeonggi-do. The results were as follows. First, more girls thought the desirable place for sex education was home and more girls consulted sexual problems with their parents. Children from low economic backgrounds experienced sex education at school and community child centers rather than at home. Second, both boys and girls replied that sexual abuse was due to the attacker's fault but more girls than boys attributed the fault to themselves. Third, girls' sex knowledge grade was higher than boys. Fourth, boys showed a more open attitude toward heterosexual dating, and children with a low economic background showed a higher sex drive. Fifth, a high sex drive was related to low sexual knowledge, openness in dating and high sexual ethics.

• Korean Journal of Human Ecology
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• v.21 no.1
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• pp.15-25
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• 2012

The purpose of this study was to examine the relationship between (1) differences in parents' interest in their children's weight, appearance orientation, eating habits and appearance evaluation, and depression based on children's gender, and (2) the pathway to children's depression. The participants in this research included 641 fourth-grade children (300 boys and 341 girls) who participated in a Korean Survey on Obesity of Youth and Children in 2009. Data were analyzed through frequency, percentage, Pearson's correlations using SPSS 19.0 and path analysis with AMOS 7.0. The findings are as follows. First, girls demonstrated higher scores in all variables except depression when compared to boys. Second, all variables indicated a direct or indirect influence on boys' depression, and appearance orientation had the greatest total effect on boys' depression. For girls, all variables again indicated a direct or indirect influence on depression, and again appearance orientation had the greatest total effect on girls' depression. However, the pathways to depression were different based on children's gender. The implications for future studies are also discussed.