• Journal of Nutrition and Health
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• v.39 no.1
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• pp.44-49
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• 2006

The aim of this study was to evaluate the body composition difference and obesity prevalence in grade 5 to 8 by gender. A total of 1,333 students, 707 boys and 631 girls, were recruited from one elementary and one middle school in Seoul, Korea. Anthropometric measurements including height, weight, lean body mass, and body fat were assessed. Height and weight were increased by grade, but Body Mass Index (BMI) by grade showed no significant difference among boys. Lean body mass had growth spurt between 7 and 8 grade among boys compared to gradual increase among girls. Overweight and obesity prevalence were higher among elementary schoolers than middle schoolers. Overweight (BMI for age> $85^{th}$ percentile) prevalence was about $44\%$ among $5^{th}$ grade boys compared $29\%$ among same grade girls. These results provided that there were prominent difference regarding body growth and obesity prevalence in gender and grade. Further studies for children and adolescents should be considered their body composition change.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.19 no.3
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• pp.156-161
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• 2008

Objectives: The purpose of this study was to investigate the prevalence of sleep problems in Korean elementary school children and the differences in sleep problems elated to their school grade and gender. Methods : One public elementary school in Dae-gu, Korea as randomly selected. And, parents who agreed to participate this study were asked to complete a modified version of Tucson Children's Assessment of Sleep Apnea screening questionnaire (TuCASA). Results: The most common sleep problem was 'falling asleep in vehicle (44.2%)' and the prevalence rate of this problem differed by school grade. The prevalence rate of falling asleep while watching TV before 8 P.M. (8.0%), daytime fatigue (21.9%) and nocturnal enuresis during the past 6 months (5.3%) were significantly differed by school grade. The prevalence rate of falling asleep while doing home work, falling sleep during a lesson, snoring and bruxism were 12.6%, 1.0%, 26.7% and 13.2% respectively. Although these rates did not show any differences between grades, snoring as more in boys and daytime fatigue was more in girls. Conclusion: This study demonstrates that many elementary school children may have various sleep problems. Lower grade elementary schoolers had sleep problems which related to euro-developmental factors, whereas higher grade elementary schoolers had sleep problems related to sleep deprivation and stress. Finally, more female schooler showed signs of fatigue or sleepiness than male schoolers.

• The Journal of Korean Academy of Sensory Integration
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• v.9 no.1
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• pp.1-9
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• 2011

Objective : The purpose of this study was to investigate attitude of grade-schoolers toward children with disabilities. Methods : The subjects of this study were grade-schoolers who have not received an inclusive education in Gim-hae. The study was surveyed from October second to 17th in 2008. The survey was categorized into three parts; comradeship, activity, and study. Each part of the survey consists of 10 questions. Data were analyzed by SPSS (version 12.0). Results : The results were as follows; First, the attitude of girls toward disabled students was non-significant compared to boys. Second, the order of attitude degree in grade of students was 4, 6, and 5. The attitude toward children with disabilities showed statistically significant difference according to grade(F=3.546, p<0.05). Third, the attitude of students who have experience of contact with people with disabilities was non-significant compared to non-experienced students. Conclusion : In conclusion, therefore peer groups in lower class levels showed more positive attitude toward the children with disabilities. The result will be useful information for understanding disabled children and making positive attitude. Also it is expected that occupational therapists help disabled children to participate in school life successfully using these information.

• Journal of Korean Academy of Nursing
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• v.39 no.3
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• pp.376-385
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• 2009

Purpose: The purposes of this study were(a) to identify smoking behavior by following a cohort representative of the population of 4th grade elementary schoolers in South Korea over a four-year period(2004-2007), and(b) to explore predictors of smoking initiation among non-smokers in Wave 1. Methods: Secondary data, the Korea Youth Panel Study, was analyzed in this study. First, frequencies or percentages were calculated to identify smoking behavior(i.e., smoking initiation, smoking intensity, and smoking duration). Second, binary logistic regression analysis was performed to examine significant factors related to smoking initiation. Results: Smoking initiation and daily smoking were more pronounced when the participants entered middle school. In bivariate analysis, statistically significant predictors of smoking initiation were loneliness at school, self-control, delinquent behavior, depressive symptoms, and stress. However, after controlling for other factors, only a high level of risk-taking tendency and a greater number of delinquent behaviors remained statistically significant. Conclusion: Based on greater involvement in smoking among first-year middle schoolers, smoking prevention strategies should be provided to elementary schoolers rather than middle schoolers. A risk-taking tendency and delinquent behaviors should be considered as proxy measures to detect the high-risk group for smoking initiation.

• Korean Journal of Health Education and Promotion
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• v.25 no.2
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• pp.61-72
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• 2008

Objectives: This study was conducted to examine the relationships among body image, self-esteem and sociability according to perception of body shape and obesity level. Methods: The subjects in this study were 325 elementary school youngsters in their sixth year. A survey was conducted, and one-way ANOVA, Scheffe test, Pearson's correlation analysis and path analysis were used for data analysis. Results: Normal weight group accounted for 43.4%, under weight group 34.8% and obesity group 21.8%. In underweight group, 53.1% of the subjects perceived their body was normal or fatty while 17% of subjects in normal group perceived their body was fatty. There were significant differences in body image according to the perception of body shape by grade(F=15.90, p=.000) and to the level of obesity(F=6.18, p=.002). There was a significant difference in self-esteem according to the perception of body shape by grade(F=3.17, p=.430). There was a significant difference in sociability according to the level of obesity(F=3.48, p=.032). There was significantly strong positive correlation among their body image, self-esteem and sociability. A structural equation model was tested and fitted the data well. Conclusions: This study suggested that health education is needed to establish the correct body image from the elementary school periods by school health educators. The right body image is more important than anything else to improve self-esteem and sociability.

• Journal of the Korean Society of School Health
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• v.29 no.3
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• pp.226-234
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• 2016

Purpose: The purpose of this study was to investigate factors predicting internet game addiction in higher grade elementary schoolers according to gender. Methods: The participants were 898 elementary school students who were in 5th and 6th grade. Data were collected via a structured questionnaire from October 1 to November 20 2012 and analyzed using descriptive statistics, $x^2$ test and logistic regression with the SPSS/WIN 23.0 program. Results: The prevalence rate of internet game addiction group was 8.8% (boys 7.1%, girls 1.7%). In terms of gender difference, it was found that girls' stress coping behaviors were more passive than male students (t=-3.27, p=.001). In boys, variables that predicted internet game addiction were aggressive coping, active coping, internet gaming hours per day and academic achievements. In girls, variables that predicted internet game addiction were aggressive coping, close friends and academic achievements. Conclusion: The findings from this study indicate there is a need to develop positive stress-coping behaviors programs and prevent internet game addiction in higher grade elementary school students.

• Journal of Fashion Business
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• v.13 no.3
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• pp.25-39
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• 2009

This research attempts to analyze the physical characteristics of middle school girls and compare the product sizes and patterns of school uniform blouses by brand. And wearing tests were performed regarding the appearance of blouse by bland. The results are follows. The standard deviation for bust circumference and waist circumference of middle school girls measured in 2004 were showed extremely large difference among individuals compared to the previous results. While waist back length reached adult size by $2^{nd}$ grade high school, bishoulder length reached adult size by $2^{nd}$ grade middle school. And girls after $2^{nd}$ grade middle school had their depth and breadth of bust, underbust circumference and bust circumference growing proportionally. These results need to be reflected in producing a pattern drafting for middle schoolers. By comparing wearing test results on appearance, it was shown that in terms of ease of bust circumference, the expert group evaluated brand with less ease as not having adequate ease compared to brand, while the middle schooler group evaluated as having sufficient ease. The front silhouette also showed same results. This reflects the preference for appearance by the middle schooler group, which is a factor to be considered during pattern drafting of school uniform blouse.

• Child Health Nursing Research
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• v.17 no.3
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• pp.198-205
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• 2011

Purpose: This study was done to identify sexual knowledge and perception and current status of sex education among parents of first and second grade elementary school age children. Methods: Participants in the study were recruited from parents with a child in the lower grades and who resided in Seoul. From January 1 to February 28, 2011, data were collected using a self-report questionnaire. Data were analyzed using McNemer test, paired t-test, ANONA, and Scheffe test. Results: Mean sexual knowledge scores for fathers and mothers were $27.74{\pm}4.94$, and $28.62{\pm}4.70$ respectively. Parent's sexual knowledge correlated with their occupation, education level, and family's monthly income. Conclusion: Study results showed that both parents are aware of the need for sex education. However, at home, mothers have a more active attitude towards sex education and conduct the education more often than fathers.

• The Mathematical Education
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• v.57 no.4
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• pp.393-412
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• 2018

Teacher quality is a key factor that determines quality of education. Being aware of this, the Korean government and teachers have been striving to improve teachers' professionalism. Research about the impacts of efforts to enhance teacher professionalism on students' academic achievement and course satisfaction, however, is extremely limited. This study sought to advance our understanding of the relationship between these factors by analyzing what teacher characteristics impact students' achievement and satisfaction. To this end, the study drew on the middle and high school data from 3rd to 6th year survey of the Seoul Educational Longitudinal Study. Structural equational modeling were used as the main approach. Latent profile analysis, a kind of mixture modeling analysis, were used as needed. This study found that teachers' participation in instruction enhancement activity and professional development impact students' attitude toward mathematics lessons and their perception on class atmosphere, and ultimately impact their academic achievement as well as their overall satisfaction in the course. In addition, teachers' use of EBS textbooks and videos impact 3rd grade high schoolers' academic achievement. These findings suggest that effort to improve teacher professionalism positively impact students' academic achievement and course satisfaction, although there is a difference according to the year grade. This study provides implications for education policy makers and teacher educators.

• The Journal of the Korea Contents Association
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• v.16 no.8
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• pp.729-742
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• 2016

The purpose of this study is to investigate the influence of parenting and peers on youth engagement to pornography media, the fourth year data of the fourth-grade panel (first year at middle school) and the fourth-year data of the eighth-grade panel (first year at high school) were analyzed. The number of cases investigated for this panel study were 2,378 subjects among the fourth-year panel of the fourth grade and 2,361 subjects among the fourth-year panel of middle schoolers. But this study, the total of 720 subjects that the response were made in the pornography items are analyzed. The result of this study reveals that male students were more likely to be addicted to pornography than female students. Also, inconsistency and excessive intervention among the parenting attitudes and peer attachment and numbers of delinquent friens among the peer factors were shown to have influence on youth addiction to pornography. Based on such results, a proposal that a plan to increase the parental education and strengthen peer relationships is important ahead of the Controlled intervention in the meantime was made.