• Journal of dental hygiene science
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• v.13 no.4
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• pp.393-402
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• 2013

The purpose of this study was to examine the relationship between vitamin D and periodontal diseases based on the raw data of the 5th National Health & Nutrition Examination Survey of 2010. The subjects in this study were 1,327 people, and those whose data on major variables were missing and who suffered from diabetes and/or osteoporosis were excluded. As for data analysis, R2.15.1 program and PASW Statistics 18.0 were utilized. The findings of the study were as follows: 1. As for all the respondents aged 50 and up, there was no significant relationship between vitamin D and periodontal diseases. 2. As for the post-menopausal women including the women who underwent bilateral ovariectomy, the vitamin D-deficit group 1 (<10) were 6.66-fold more likely to suffer from periodontal diseases than the vitamin D-sufficient group (${\geq}30$) (OR, 6.66; 95% CI, 1.004~44.19). The above-mentioned findings ascertained that vitamin D had a significant negative correlation to periodontal diseases among the post-menopausal women including the women who underwent bilateral ovariectomy. This finding should be taken into account in terms of the prevention and management of periodontal diseases.

• Journal of the Korea Society of Computer and Information
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• v.26 no.8
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• pp.209-220
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• 2021

The effect of body composition such as lean mass and fat mass on bone mineral density (BMD) is complex and still controversial. In this study, we investigated the relationship between body composition and bone mineral density using nation-wide data from 2008 to 2011 Korea National Health and Nutrition Examination Survey (KNHANES) in 2,139 men and 2,193 postmenopausal women aged 50 years or older. Subjects with history of medication for osteoporosis or with diseases or malignancy affecting bone metabolism were excluded. Data of anthropometric measurements and demographic characteristics were collected by trained examiner. Fasting blood sample was obtained for blood chemistry analysis. BMD of the lumbar spine, total femur, and femoral neck, and body composition such as total lean mass (TLM), total fat mass (TFM), truncal fat mass (TrFM) were measured using dual-energy X-ray absorptiometry (DXA). There were significant positive correlations between body composition indices such as lean mass and fat mass with BMD. In multiple regression analysis, TLM was positively associated with BMD after adjusting age, body mass index, monthly house income, education level, physical activity, daily calcium intake and vitamin D concentration in both men and postmenopausal women. BMD at lumbar spine and femur in lowest quartile of TLM was significantly lower than other quartiles after adjusting those confounding factors in both gender. TrFM was negatively associated with total femur BMD in male and femur neck BMD in postmenopausal women after adjusting confounding factors. In conclusion, TLM is very important factor in maintaining BMD in subjects aged 50 years or older in men and postmenopausal women.

• Journal of dental hygiene science
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• v.17 no.4
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• pp.290-297
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• 2017

The purpose of this study was to compare dental health status of South Korean adults, according to the control protocol of glycated hemoglobin A1c (HbA1c). From the measurements of HbA1c levels of 4,991 individuals over the age of 19 who participated in the sixth Korea National Health and Nutrition Examination Survey, the following conclusions were obtained. Glycated hemoglobin was 7.2% in the HbA1c ${\geq}6.6$ diabetic group and 5.9% in women and 8.5% in men. The ratio in the glucose non-control group was higher in the older age group, the lower average monthly household income group, and the lower education level group. Both the tissue health index and functioning teeth index indices were slightly higher in both men and women in the glucose control group. The tissue health index was higher in the younger age group, in the higher average monthly household income group, and in the higher education level group. The missing teeth (MT) index was greater among women (3.775 pieces) than among men (2.317 pieces) in the glucose non-control group. Higher age correlated with a greater number of MT, while higher income and education levels correlated with a lower number of MT. In conclusion, we will continue to provide counseling and education on oral health problems, thereby widening the awareness of the importance of oral health care and providing a variety of media and education methods related to medical and oral health that can manage diabetic patients according to the level of HbA1c It should be developed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.104-111
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• 2016

This study examined the effects of the biological markers and lifestyle factors on the presence of diabetes in middle-aged adults. A total of 5,363 adults aged 40-64 years were recruited from the 2010-2012 Fifth Korean National Health and Nutrition Examination Survey. The data were analyzed by descriptive statistics, Chi-square test, ANCOVA and logistic regression. The results were as follows. The body mass index was significantly higher in the prediabetes and diabetes group than in the normal group. Hypertension, abdominal obesity, hypercholesterolemia, hypertriglyceridemia, smoking, drinking, and carbohydrate intake were significantly different among three groups. Hypertension, hypercholesterolemia, hypertriglyceridemia, abdominal obesity, body mass index and drinking were the influencing biological markers and lifestyle factors in prediabetes. The significant factors influencing diabetes were hypertension, hypercholesterolemia, hypertriglyceridemia, abdominal obesity, body mass index, and smoking. Overall, the development of intervention programs for effective diabetes prevention in middle-aged adults by lifestyle modification of hypertension, obesity, dyslipidemia, drinking, and smoking is recommended.

• Journal of Nutrition and Health
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• v.52 no.1
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• pp.47-57
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• 2019

Purpose: This study was conducted to investigate the relationship between atopic dermatitis and dietary fat and fatty acid (FA) intakes in 9 ~ 11 year old children. Methods: We analyzed data from the combined 2013 ~ 2015 KNHANES (Korean National Health and Nutrition Examination Survey). Subjects were divided into two groups according to atopic dermatitis (AD); with AD and without AD. Data pertaining to macronutrients and FA intakes were obtained by a single 24-h dietary recall. Food sources were identified based on the amounts of total fat and FA consumption according to each food. The associations between each FA intake and atopic dermatitis were analyzed using simple and multiple logistic regression analyses. Age, sex, body mass index (BMI) and income levels were adjusted as covariates. Results: Of the participants, 17.69% suffered from atopic dermatitis. Children with AD had significantly lower fat percentages of total energy and higher carbohydrate percentages of total energy than normal children. Percentages of energy and intakes of polyunsaturated fatty acid (PUFA), n-3 FA and n-6 FA in children with AD were significantly lower than those in normal children. In the FA, linoleic acid, ${\gamma}$-linoleic acid and ${\alpha}$-linolenic acid levels of children with AD were significantly lower than those of normal children. However, the P/S ratio and n-6/n-3 ratio did not differ significantly between children with AD and normal children. Soybean oil was the main contributor to PUFA, n-3 FA and n-6 FA in both groups, while perilla seed oil and mackerel were the major food sources of n-3 FA in children with atopic dermatitis. Atopic dermatitis was significantly correlated with low-fat and high-carbohydrate diets. The adjusted odds ratios were 0.966, 0.776 and 0.963 for PUFA, n-3 FA, and n-6 FA intakes, respectively. Conclusion: The present study provides reliable evidence regarding the relationship between fat and FA intakes and AD in Korean children 9 ~ 11 years of age.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.3
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• pp.309-316
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• 2018

Purpose: This study was conducted to identify the prevalence and related factors of metabolic syndrome in Korean adolescents. Method: Based on data from the Korea National Health and Nutrition Examination Survey of 2015, 404 adolescents aged 12-18 years were enrolled. We used the adolescent Ford method as the diagnostic criteria for adolescent metabolic syndrome. The data were analyzed using descriptive statistics, t-test, $x^2$-test, and logistic regression with SPSS WINDOW 23.0 program. Results: The prevalence of metabolic syndrome in Korean adolescents was 6.5% (6.5% for boys and 6.4% for girls). Among metabolic syndrome components, the prevalence of elevated blood pressure (28.8%) was the highest, followed by elevated triglycerides (21.3%), increased waist circumference (14.1%), decreased high density lipoprotein-cholesterol (11.5%), and elevated fasting blood sugar (7.8%). The only factor associated with metabolic syndrome in both boys and girls was the Body Mass Index (BMI), and the likelihood of a metabolic syndrome increased by 1.6 to 2.3 times (Adjusted OR=1.552 to 2.313, p=0.001) as the BMI increased. Conclusion: Based on the results of this study, an intervention program should be developed and provided to maintain the BMI in the normal range for the prevention and management of metabolic syndrome in Korean adolescents.

• The Journal of the Korea Contents Association
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• v.15 no.8
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• pp.336-344
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• 2015

This study evaluated the association between metabolic syndrome(MetS), its components and depression among Korean community-dwelling older adults. We analyzed data from the fifth Korea National Health and Nutrition Examination Survey(KNHANES-V) 2010-2012. This study was a descriptive study of 3,755 Korean elderly, aged 65 years and older. A modified version of the criteria of the National Cholesterol Education Program, Adult Treatment Panel III was used to define MetS. Depressive symptoms were assessed using the questionnaire of the KNHANES-V. Multiple regression analyses performed the association between MetS, its components and depression. MetS was not statistically associated depressive symptoms, but low high-density lipoprotein cholesterol(HDL-C) was statistically associated depressive symptoms(Odds raio[OR]=1.26, 95%Confidence Interval [CI]=1.002-1.584) in older adults. Among elderly women, MetS(OR=1.36, 95%CI=1.029-1.792), elevated fasting glucose(OR=1.41, 95%CI=1.070-1.851), low HDL-C(OR=1.21, 95%CI=1.078-1.746) were statistically associated depressive symptoms. In conclusion, present study showed an association between MetS and depressive symptoms in Korean community dwelling elderly women but not in men.

• Journal of the Korean Data and Information Science Society
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• v.24 no.4
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• pp.815-824
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• 2013

Traditional Pearson chi-squared test is not appropriate for the data collected by the complex sample design. When one uses the traditional Pearson chi-squared test to the complex sample categorical data, it may give wrong test results, and the error may occur not only due to the biased variance estimators but also due to the biased point estimators of cell proportions. In this study, the design based consistent Wald test statistics was derived for k-population homogeneity test, and the traditional Pearson chi-squared test statistics was partitioned into three parts according to the causes of error; the error due to the bias of variance estimator, the error due to the bias of cell proportion estimator, and the unseparated error due to the both bias of variance estimator and bias of cell proportion estimator. An analysis was conducted for empirical results of the relative size of each error component to the Pearson chi-squared test statistics. The second year data from the fourth Korean national health and nutrition examination survey (KNHANES, IV-2) was used for the analysis. The empirical results show that the relative size of error from the bias of variance estimator was relatively larger than the size of error from the bias of cell proportion estimator, but its degrees were different variable by variable.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.6
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• pp.2570-2578
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• 2012

We investigated whether coffee and green tea consumption reduced the risk of elevated alanine aminotransferase(ALT)/aspartate aminotransferase(AST) activity and the prevalence of metabolic syndrome. Participants were 5,283 adults, aged 19-79 years, in the Third Korean National Health and Nutrition Examination Survey, with excessive alcohol consumption, overweight, viral hepatitis, metabolic syndrome. Increased coffee and green tea consumption was not associated with decreased serum ALT. However, amount of coffee consumption had negative correlation with serum AST activity. Moreover, coffee consumption reduced the prevalence of metabolic syndrome (p for trend <0.001). Hypertension, impaired glucose metabolism and dyslipidemia was involved as subgroup of metabolic syndrome. Comparing persons who drank more than 2 cups per day with less than 1 cup per day, the prevalence of all subgroups was declined significantly. In this large, national, population-based study, consumption of coffee was associated with lower the risk of metabolic syndrome.

• Journal of Food Hygiene and Safety
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• v.29 no.2
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• pp.141-145
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• 2014

To assess the health risk for benzo(a)pyrene by the intake of edible oils, 288 cases of edible oils collected from food markets were analysed using the high performance liquid chromatography with fluorescence detector. The levels of benzo(a)pyrene were from non-detection to $4.78{\mu}g/kg$, and the average was $0.11{\mu}g/kg$. The chronic daily exposures of benzo(a)pyrene for total population group and consumer-only group were estimated using the food consumption data in the fifth Korea National Health and Nutrition Examination Survey in 2011. The estimated daily intake of benzo(a)pyrene was $4.26{\times}10^{-3}ng/kg$ b.w./day for total population group and $7.64{\times}10^{-3}ng/kg$ b.w./day for consumer-only group. The MOE (margin of exposure) of benzo(a)pyrene for total population group and consumer-only group was $7.28{\times}10^7{\sim}1.74{\times}10^8$ and $3.95{\times}10^7{\sim}9.42{\times}10^7$, respectively. Accordingly, the health risk from benzo(a)pyrene caused by the intake of edible oils was considered as a very low level.