• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.7
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• pp.453-462
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• 2018

This study was conducted to investigate whether the parental sodium intake and the sodium intake of adolescents are consistent with each other, to identify factors affecting sodium intake of adolescent children, and to measure sodium intake at home. For this study, 405 subjects in the National Health and Nutrition Survey of 2015 whose sodium intake was measured among nutritional intake were selected, excluding elementary school students, middle school students and high school students aged 7 to 18 years. The data were then matched with the father ID and the mother ID in the youth ID. The results of this study were as follows: ${\beta}=-0.187$ for male adolescents, ${\beta}=0.192$ for older adolescents, ${\beta}=0.153$ for higher adolescents, and sodium intake for adolescents. This is because the mother usually prepares meals in Korea. On the other hand, it is predicted that parents will not be able to consider the quality of their children due to the increased number of dual-income couples.

• Korean Journal of Community Nutrition
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• v.7 no.6
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• pp.844-851
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• 2002

Smoking can increase oxidative stress and thereby change the antioxidant defense system in the body. To investigate the relationship between male adolescent smoking and antioxidant status, we surveyed the eating habits and dietary intake of 82 smokers and 44 nonsmokers recruited from a male technical high school. In addition, antioxidant enzyme activity and lipid peroxide values were determined in both the plasma and the erythrocytes. Although the frequency of food intake was not significantly different, most nutrient intake was unexpectedly higher in smokers than in nonsmokers. In comparison with the Korean RDA, especially the average intake of Ca, Fe and vitamin $B_2$ didn t reach 75% of the Korean RDA in either smokers or nonsmokers. An analysis of antioxidant enzyme activity showed that plasma catalase. superoxide dismutase (SOD), glutathione peroxidase (GSH-px), erythrocyte catalase and GSH-px activities showed no significant difference between smokers and nonsmokers. However, the erythrocyte SOD activity of smokers (1.57 unit/mgHb) was significantly lower than that of nonsmokers (2.00 unit/mg Hb). In addition, the plasma ceruloplasmin concentration of smokers (28.68 mg/$d\ell$) was significantly higher than that of nonsmokers (26.30 mg/$d\ell$), whereas the specific ceruloplasmin ferroxidase activity of smokers (0.31 unit/mg) was lower than that of nonsmokers (0.35 unit/mg). The plasma and erythrocyte thlobarbituric acid reactive substance (TBARS) of smokers (2.57 $\mu$mol/L, 0.32 $\mu$mol/gHb) were also significantly higher than those of nonsmokers (2.25 $\mu$mol/L, 0.27 $\mu$mol/gHb). The overall data indicate that adolescent smoking might decrease the antioxidant capacity of the body, in part, by lowering the erythrocyte SOD activity and the specific ceruloplasmin ferroxidase activity.

• Korean Journal of Community Nutrition
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• v.5 no.3
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• pp.444-451
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• 2000

This study was conducted to investigate how body size and weight control experience affect the nutrient intakes and the health status of adolescent females. The survey was carried out by self-questionnaires with 463 female high school and college students in Daegu. Analysis of data was done by using a t-test, and ANOVA with the SAS computer program. The average height, weight and BMI of the subjects were 161.2 cm, 53.4 kg, and 20.51 kg/$m^2$ respectively. However, 25.1% of the subjects belonged to the underweight group when we divided the subjects into 3 groups- underweight, normal-weight, overweight-according to their present body size. The average Fe intake of the subjects was less than 50% of the Korean recommended dietary allowances. The dietary intakes of energy and Vit. A were significantly higher in the underweight group than in other groups. However, no significant differences among body size groups were observed in the dietary habit score and the nutritional knowledge score. It also appeared that the dietary habit score and the nutritional knowledge score of the weight control attemptees were worse than those of the non-attemptees. The physical health status of the subjects significantly differed according to weight control experience, and the psychological health status of the subjects differed with present body size. The physical health condition of the weight control attemptees was worse than the non-attemptees. and the psychological health condition of the overweight group was worse than other groups. The results indicated that unnecessary weight control in adolescent females induces unhealthy food behavior which is linked to undesirable health status.

• Journal of the Korean Society of School Health
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• v.29 no.1
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• pp.22-32
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• 2016

Purpose: This study is intended to analyze factors of metabolic syndrome and vitamin D deficiency with resources obtained from the Korea National Health and Nutrition Examination Survey (KNHANES) V conducted in 2010. Methods: The subjects were 870 adolescents aged from 10 to 18 who participated in the first KNHANES V. Secondary data analysis was done by Chi-square, ANOVA, correlation analysis and simple linear regression. Results: The influencing factors of metabolic syndrome were vitamin D, systolic blood pressure and diastolic blood pressure, which were statistically significant. Simple linear regression was conducted to identify the influence of vitamin D on the factors related to metabolic syndrome, which showed that waist size (t=-1.97, p<.05), systolic blood pressure (t=-2.88, p<.01), and diastolic blood pressure (t=-5.72, p<.001) were influenced by vitamin D. In addition, each factor decreased by .131, .209, and .355, respectively, when vitamin D increased by one unit. Conclusion: Metabolic syndrome is a factor to be considered in order to improve adolescent health and form adolescent health behaviors. Schools, families, and local communities should cooperate with each other on the foundation of a regular health screening process and systematic health education programs. In addition, it is expected enhanced physical activities and sports club participation can prevent metabolic syndrome and increase vitamin D among adolescent.

• Journal of Nutrition and Health
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• v.32 no.8
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• pp.908-917
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• 1999

This study was done to compare nutrient intakes, anthropometric indices, and psychosocial factors related to smoking by smoking status among adolescent girls in Seoul. Subjects were high school students, and smokers were 17.6%. Nutrient intakes were analyzed by convenient method, and anthropometric measurements were done by Inbody 2.0. Psychosocial factors of smoking were examined based on the Theory of Planned Behavior : 26 attitudinal, 9 normative, and 17 control beliefs were used. Smokers smoked 5-7 cigarettes a day on average, with 1.26 pack-years of smoking, There were no significant differences in anthropometric characteristics, except fat distribution, between smoking(n=92) and nonsmoking(n=92) and nonsmoking(n=94) group. The percentage of alcohol groups. Especially, caloric intake (63.6% of RDA) were much below the recommended level. With respect to psychosocial factors, 18 out of 26 attitudinal beliefs were significantly different between smokers and nonsmokers. Smokers responded less negatively on the items of bad health effects of relax(p<0.001). In addition, smokers were more convinced of advantages of smoking (test, etc.)but responded less negatively on the disadvantages of smoking(bothering others, yellow teeth, bad breath, etc.). Smokers expressed less pressure for not smoking from siblings, friends, school seniors than nonsmokers. In addition, smokers, expressed less confidence in controlling the urge to smoker or quitting smoking in several situations, such as 'after a meal', 'feel bored', 'with friends', 'when angry' offered a cigarette by friends', 'drinking coffee or tea', 'drinking alcohol', 'seeing others smoke'(p<0.001). Smokers also felt less developing in applying specific skills for controlling the urge to smoker or quitting smoking. These findings suggest the need for developing smoking cessation programs for adolescent females, focusing on specific beliefs identified in this study.

• Journal of Nutrition and Health
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• v.30 no.7
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• pp.832-839
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• 1997

The purpose of this study is to survey the prevalence of obesity assessed on the basis of height and weight among students in primary and secondary schools in the metropolitan area of Seoul, Korea during the period of 1979 to 1996. The major findings are as follows ; 1) The fiftieth percentile values of BMI have increased more in mid-ranged age group than upper(16-17 years old) and lower(6-7 years old) ranged age groups. 2) The prevalence of obesity by standard weight of height was higher among male students than female students and students in the primary schools showed higher weight increase than adolescent age(12-17 years old) group. As a whole, the prevalence of obesity over last 18 years has increased 4.6 times in males and 3.2 times in females. 3) Judged on the basis of the BMI 90th, 95th percentile values of 1979 , the prevalence of obesity among male students showed higher increases than among female students. Higher increase was also observed among primary school students than among middle and high school students. Increase of weight was higher for the $\geq$95th percentile group than the 90-95th percentile group. 4) Judged on the basis of the BMI, 90th, 95 th percentile values of NHANES-I, the $\geq$95th percentile group showed higher increase in the prevalence of obesity than the 90-95th percentile group. According to the 1996 data, severe obesity group ($\geq$95th percentile) was about two times of NHANES-I in male primary school students, while the number for female middle and high school students was about 1/5 of NHANES-I.

• Journal of Korean Medical Science
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• v.33 no.50
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• pp.320.1-320.8
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• 2018

Background: Muscle mass and muscle function are related to depressed mood in studies of adults. Like adults, Korean students are highly likely to suffer from decreased muscle mass due to social conditions. In this study, we evaluated the muscle mass status of Korean adolescents and assess the effect of muscle on depressive mood. Methods: A total of 1,233 adolescent boys and girls participants from the Korea National Health and Nutrition Examination Survey were enrolled in our study. Participants underwent dual-energy X-ray absorptiometry for assessment of appendicular muscle mass and completed questionnaires regarding depressed mood, stress, suicidal ideations, and attempts. Results: There was no difference in depressive mood according to muscle mass among boys (P = 0.634); girls with decreased muscle mass had a greater tendency for depressed mood compared to girls with optimal muscle mass (P = 0.023). After adjusting for age, waist circumference-to-height ratio, smoking status, alcohol consumption, frequency of physical activity, self-reported obesity, weight-loss efforts, and monthly household income, girls with low muscle mass (LMM) were 2.60 times more at risk of developing depression than girls with normal muscle mass (95% confidence interval [CI], 1.05-6.49; P = 0.040). This trend was similar for girls with LMM with obesity (95% CI, 1.00-11.97; P = 0.049). Conclusion: Adolescent girls who have insufficient muscle mass are more likely to report depressed mood than girls who have ideal muscle mass. Interventions for maintaining proper muscle mass are required.

• The Korean Journal of Health Service Management
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• v.12 no.2
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• pp.101-112
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• 2018

Objectives : This study examined the influence of socio-demographic, health-related, and oral health-related characteristics on adolescent DMFTs. Methods : The subjects in this study were 1,129 adolescents selected from the 6th national health and nutrition examination survey data. To determine the factors influencing dental caries, a regression analysis using a complex-sample generalized linear model was conducted after adjusting for confounding factors. Results : DMFTs were smaller among boys than girls, and smaller in the "13-15 age group" than in the "16-18 age group." In terms of household income, DMFTs were larger in the "lower," "lower-middle," and "upper-middle" income brackets than in the "upper" income bracket. DMFTs were smaller among adolescents with a history of smoking than those who had never smoked. Conclusions : In order to improve the oral health of adolescents, oral health-promotion programs should be provided for girls, high school students, students from low-income families, smokers, and those who consider themselves to have poor oral health.

• Physical Therapy Rehabilitation Science
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• v.13 no.1
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• pp.134-142
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• 2024

Objective: This study aimed to compare the subjective health status, physical activity index, and perceived stress rate of obese children with those of healthy children through propensity matching analysis and to use the results to help manage obese children. Design: Descriptive correlation study. Methods: This study conducted a secondary analysis using raw data from the National Health and Nutrition Examination Survey. Propensity matching (1:2) was conducted between obese and healthy adolescents. Results: The number of days of physical activity was 1.22 days for the obese adolescent group and 1.01 days for the non-obese adolescent group, which was higher in the obese group (p=0.003). The subjective health status was 3.43 and 3.81 in the obese and non-obese adolescent groups, respectively, showing a higher difference in the normal group (p<0.001). No statistical difference was observed in the perceived stress rate (p=0.871) or strength exercises (p=0.190) between the two groups. Conclusion: This study suggests the need for development measures to effectively improve youth physical activity, muscle-strengthening programs, stress management, and subjective health status in obese and normal groups.

• Journal of Community Nutrition
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• v.1 no.1
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• pp.16-24
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• 1999

The purpose of this study was to investigate the association between adolescent smoking and antioxidant vitamins. Subjects were 87 non-smokers and 90 smokers. who were female high school students. Smokers were divided into tow groups by smoking status, 35 light smokers (packyear<1) and 53 heavy smokers(packyear$\geq$1). Dietary intakes were examined through questionnaires and nutrient intakes of vitamin C and A were analyzed by smoking status using Computer Aided Nutritional analysis program for professional (CAN-PRO). Serum vitamin C level was measured by 2,4-dinitrophenylhydrazine method and serum levels of vitamin A and E were measured by HPLC. Erythrocyte lipid peroxide levels was measured by thiobarbituric acid reactive substance (TBARS) method. All data were statistically analyzed by SAS PC package program. The mean vitamin C intakes of non-smokers, light smokers and heavy smokers were 58.2mg/day, 50.1 mg/day 58.1mg/day, respectively. The mean vitamin A intakes of non-smokers, light and heavy smokers were 28.1$\mu\textrm{g}$R.E./day, 278.7$\mu\textrm{g}$R.E./day and 289.6$\mu\textrm{g}$R.E./day, respectively. There was no significant difference in dietary intakes of antioxidant vitamins by smoking status. However, the serum vitamin C level, 11.40mg/l in heavy smokers was 12% lower than that of than that of 12.70mg/l in non-smokers. The serum vitamin A level was not significantly different among the groups. Vitamin E level, 8.79mg/l in heavy smokers was 8% lower than that of 9.53mg/l in non-smokers. There was no significant correlation between the dietary intakes and serum levels of vitamin A and C. The erythrocyte TBARS level, 1.90nmol/ml in light smokers was significantly lower (p<0.05) than 2.71 nmol/ml in heavy smokers or non-smokers. The correlation data showed that the cerythrocyte TBARS level had a significant positive correlation with packyear. Overall results might suggest that cigarette smokers with a longer smoking history need more dietary intakes of vitamin C and E than do non-smokers to reach the same serum level.