• Journal of Nutrition and Health
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• 제46권1호
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• pp.61-71
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• 2013

The aim of this study was to examine the relationship between dietary variables and the prevalence of insulin resistance (IR) in middle-aged Korean adults using data from the 2007-2009 Korea National Health and Nutrition Examination Survey. Because IR is closely linked with metabolic syndrome, subjects were divided into three groups according to symptoms of metabolic syndrome: the 'Normal group' without any symptoms, the 'Risk group' with one or two symptoms, and the Metabolic syndrome (MetS) group' with three or more symptoms. Subjects between the ages of 30 and 65 years with no prior diagnosis or treatment for diabetes, hypertension, or dyslipidemia were selected. The number of subjects per group was as follows: 2,085 adults in the Normal group, 3,699 adults in the Risk group, and 1,160 adults in the MetS group. Metabolic syndrome was defined according to Adult Treatment Panel III criteria with modified waist circumference cutoff values (men ${\geq}$ 90 cm, women ${\geq}$ 85 cm). Subjects with HOMA-IR > 2.0 were classified as IR. Homeostasis Model Assessment of Insulin Resistance (HOMA-IR) was calculated using the following formula: (fasting plasma glucose ${\times}$ fasting plasma insulin)/22.5. Nutrients and food groups intake were obtained from a single 24-hour recall. Subjects with IR in the Normal group were more obese and less physically active than non-IR subjects. In the MetS group, subjects with IR were more obese and had a lower prevalence of smoking and drinking, compared with non-IR subjects. Men with IR in the Normal group had a tendency to consume more oils and sugars than non-IR men, while women with IR in the same group had higher intake of carbohydrate, dietary glycemic index, and dietary glycemic load than non-IR women. Women with IR in the Risk group had lower energy intake but higher intake of oils and sugars than non-IR women. In the MetS group, consumption of fruits was higher in subjects with IR than in non-IR subjects. In conclusion, findings of this study suggest that dietary carbohydrate intake, including glycemic index, may be associated with IR in healthy women. Further research in prospective cohort studies in order to examine the effects of dietary carbohydrate on IR incidence will be necessary.

• Journal of Nutrition and Health
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• 제49권5호
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• pp.304-312
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• 2016

본 연구는 2007~2012년 국민건강영양조사 자료를 이용하여 30세 이상 제2형 당뇨병 여성 환자의 과일류 및 생선류 등의 식품섭취량과 심혈관질환 위험인자와의 관련성을 분석하였다. T2DM군이 NFG군에 비해 과일류 및 생선류의 섭취량이 유의적으로 낮았고 이들의 섭취량이 증가할수록 고중성지방혈증의 위험성이 유의적으로 감소하는 것으로 나타났다. 또한, 과일류와 생선류 섭취량은 각각 중앙값 이상으로 많이 섭취한 군 (FF3)이 각각 중앙값 이하로 섭취한 군 (FF1)에의 비해 TG 농도가 높을 위험이 유의적으로 낮았다. 이러한 결과는 과일류에 김치를 제외한 채소류, 버섯류, 해조류의 섭취량을 포함시켜 분석했을 때에도 같은 결과를 나타내었다. 따라서, 한국인 제2형 당뇨병여성 환자의 과일류 및 생선류의 섭취가 심혈관질환에 긍적적인 영향을 미치는 것으로 보이며, 과일류나 생선류 중 어느 한 종류만 많이 섭취하기보다는 두 종류를 모두 적절히 섭취하는 것이 심혈관 질환 위험성을 낮추는데 효과적일 것으로 사료된다.

• Nutrition Research and Practice
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• 제9권6호
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• pp.650-657
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• 2015

BACKGROUND/OBJECTIVES: The aim of this study was to estimate average total fat and fatty acid intakes as well as identify major food sources using data from the Korea National Health and Nutrition Examination Survey (KNHANES) VI-1 (2013). SUBJECTS/METHODS: Total fat and fatty acid intakes were estimated using 24-hour dietary recall data on 7,048 participants aged ${\geq}3years$ from the KNHANES VI-1 (2013). Data included total fat, saturated fatty acid (SFA), monounsaturated fatty acid (MUFA), polyunsaturated fatty acid (PUFA), n-3 fatty acid (n-3 FA), and n-6 fatty acid (n-6 FA) levels. Population means and standard errors of the mean were weighted in order to produce national estimates and separated based on sex, age, income, as well as residential region. Major food sources of fat, SFA, MUFA, PUFA, n-3 FA, and n-6 FA were identified based on mean consumption amounts of fat and fatty acids in each food. RESULTS: The mean intake of total fat was 48.0 g while mean intakes of SFA, MUFA, PUFA, n-3 FA, and n-6 FA were 14.4 g, 15.3 g, 11.6 g, 1.6 g, and 10.1 g, respectively. Intakes of MUFA and SFA were each higher than that of PUFA in all age groups. Pork was the major source of total fat, SFA, and MUFA, and soybean oil was the major source of PUFA. Milk and pork were major sources of SFA in subjects aged 3-11 years and ${\geq}12years$, respectively. Perilla seed oil and soybean oil were main sources of n-3 FA in subjects aged ${\geq}50years$ and aged < 50 years, respectively. CONCLUSIONS: Estimation of mean fatty acid intakes of this study using nationally represented samples of the Korean population could be useful for developing and evaluating national nutritional policies.

• Nutrition Research and Practice
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• 제4권3호
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• pp.229-234
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• 2010

Recently, we found and analyzed vitamin $B_{12}$ in some Korean traditional plant foods which had not reported, yet. This study was to investigate vitamin $B_{12}$ intake and its dietary sources and the vitamin $B_{12}$ status in the very old elderly Koreans. We measured serum vitamin $B_{12}$ level and estimated the amounts of vitamin $B_{12}$ intake from different dietary sources in female elderly Koreans aged 85 and over who had consumed a relatively low animal traditional diet for the whole life. The average age of the subjects (n = 127) was 98.0 years (85-108 years). The assessment on energy and nutrient intake involved a one-day 24-hour recall, and serum vitamin $B_{12}$ concentration was measured by radioimmunoassay. Overall diet pattern was not different between the 85-99 yr-old group and centenarians, except centenarians were taking more dairy product. The average ratio of plant food to animal food consumption was 87.5:12.5 in weight. The average vitamin $B_{12}$ intake of our subjects was 3.2 ${\mu}g$, and 52.7% of subjects consumed under estimated average requirement, 2.0 ${\mu}g$/day. On dietary source, 67.3% of dietary vitamin $B_{12}$ was from meat, eggs and fishes and 30.6% was from plant foods, such as soybean-fermented foods, seaweeds, and kimchi. The average serum vitamin $B_{12}$ concentration was 450.5 pg/mL, and low serum vitamin $B_{12}$ (< 200 pg/mL) was found in 9.6% of subjects. Dietary vitamin $B_{12}$ intake was significantly lower in subjects with low serum vitamin $B_{12}$ (0.79 ${\mu}g$/day) than those with normal serum vitamin $B_{12}$ (3.47 ${\mu}g$/day). There were no significant difference in vitamin $B_{12}$ intake and its dietary sources and serum vitamin $B_{12}$ level between the 85-99 yr- old group and centenarians. In conclusion, several plant-origin foods including seaweed, soybean-fermented foods, and kimchi, may contribute significantly to good vitamin $B_{12}$ status in very old elderly Koreans.

• Journal of Nutrition and Health
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• 제34권2호
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• pp.213-221
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• 2001

Because the intake of vitamin A had been consistently found to be low among Koreans, there has been a concern that mild vitamin A deficiency might be prevalent in the population. However, the inaccuracy of vitamin A database has long been suspected database for the nutrient. This study was performed to assess the vitamin A and E status in 208 adults over 20 years of age living in a rural area of Korea. Newly modified database for vitamin A and E was used to estimate the dietary intake of the subjects in this study. A cross sectional survey of dietary intake with 24-hour recall method was conducted. Serum retinol and $\alpha$-tocopherol levels of the subjects were analyzed in fasting samples using HPLC. For vitamin A, mean levels of dietary intake and percent of RDA were 620.3$\pm$1087RE/day and 88.6$\pm$155.4%, respectively, which were considerably higher than the levels reported in 1995 Korean national Nutrition survey(470.1RE/day and 67.2%, respectively). For vitamin E, the levels were 9.74$\pm$6.30mg/day and 97.4$\pm$63.0%, respectively. Mean concentration of serum retinol was 83.1$\pm$30.1$\mu\textrm{g}$/dl and none of the subjects was below 10$\mu\textrm{g}$/dl, or deficient level. Mean serum retinol in men, 99.8$\pm$30.4$\mu$g/dl, was significantly higher than in women, 70.7$\pm$23.4$\mu\textrm{g}$/dl (p<0.01). Mean concentration of serum $\alpha$-tocopherol was 1.17$\pm$0.52mg/dl and that of one subject was below 0.5mg/dl, or deficient level. Serum $\alpha$-tocopherol levels of the old subjects were higher than the younger subjects in both sexes(p<0.05). These data suggest that contrary to the previous reports about low intake of vitamin a, intake and serum levels of vitamin A among the subjects are not low. Also, in this study, intake and serum levels of vitamin E are not low, either. (Korean J Nutrition 34(2) : 213~221, 2001)

• Journal of Nutrition and Health
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• 제34권7호
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• pp.762-769
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• 2001

Recently developed TRAP assay(Total Radical-trapping Antioxidant Potential) is a new technique which enable effectively the measurement of total antioxidant status in the plasma. Researches using TRAP method have rarely been reported in Korea. Therefore, we investigated effects of various life-style and dietary factors on plasma TRAP level in Korean adult population. The subjects consisted of 161 health adult male(n=105) and female (n=56) aged 19-57. A self-administered questionnaire ascertained life-style factors including smoking habits, alcohol use, physical activity. Dietary factors were analyzed by 24 hour recall method. TRAP was determined spectrophotometrically in plasma at 734nm. Mean plasma TRAP concentrations were slightly higher in males (1.35$\pm$0.02mM) and females(1.30$\pm$0.02mM) without significance. There were significant correlations between plasma TRAP levels and life-style factors including exercise and smoking Plasma TRAP levels were affected more by exercise than by smoking. Moderate amount exerciser(exercise time $\geq$30min/day) had significantly higher level of plasma TRAP levels in male smokers(1.33$\pm$0.03mM) were significantly lower than those in male nonsmokers(1.39$\pm$0.01mM, p<0.05), but the difference was not seen in female subjects. Intakes of vitamin C(r=0.288, p=0.007) or folate (r=0.258, p=0.016) were positively correlated with plasma TRAP levels in nonsmokers, but those relations were not seen in smokers. Dietary factors such as vegetables (r=0.288, p=0.007)or folate (r=0.258, p=0.016) were positively correlated with plasma TRAP levels in nonsmokers, but those relations were not seen in smokers. Dietary factors such as vegetables (r=0.277, p=0.009) and legumes(r=0.263, p=0.013) consumption were positively related to plasma TRAP concentrations also in nonsmokers only. Regular green tea drinkers showed significantly greater level of plasma TRAP than the non green tea drinkers(1.36$\pm$0.01mM vs 1.30$\pm$0.03mM, p<0.05). These results suggest that the regular exercise($\geq$30min daily), nonsmoking, and consumption of vegetables, legumes and green tea would contribute to improving plasma TRAP levels in Korean adults.

• Journal of Nutrition and Health
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• 제50권6호
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• pp.624-644
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• 2017

본 연구는 우리나라와 일본의 식품성분표를 함께 이용하여 한국인 상용식품의 요오드 데이터베이스를 구축하였고, 1998년~ 2014년의 국민건강영양조사 자료를 이용하여 한국 성인의 요오드 섭취량 및 추이를 분석하였다. 조사대상자는 19세 이상 성인을 대상으로 하여 총 56,818명이며, 대상자의 일반적 사항, 식생활 관련 요인, 식품군, 식사제공 장소 등으로 나누어 요오드 섭취량을 분석하였다. 전체 요오드 섭취량은 1998년에서 2014년으로 갈수록 감소하는 추세를 나타냈다. 일반적 사항에서 남녀의 비율은 50% 내외로 비슷한 수준이었으며, 여성보다 남성의 요오드 섭취량이 높게 나타났다. 연령의 경우, 30 ~ 49세의 요오드 섭취비율이 39 ~ 46%로 가장 높았다. 식생활 관련 요인은 점심에 요오드 섭취비율이 1998년에서 2014년까지 29.4 ~ 34.4% 사이로 가장 높았다. 음식 제공장소 중 가정식에서 섭취하는 요오드 섭취량은 시간이 지남에 따라 감소하는 것으로 나타났다. 식품군에 따른 요오드 섭취량은 해조류가 가장 높게 나타났으며 음식제공 형태별 요오드 섭취량은 모든 연도에서 국 및 탕류가 가장 높은 것으로 조사되었다. 요오드 주요 급원 식품으로는 다시마가 가장 요오드 함유량이 많은 식품으로 조사되었고 그 외 카레소스를 제외하고 미역, 김 등의 해조류가 상위권을 차지하였다. 연구결과를 종합해보면 한국 성인의 요오드 섭취량은 적정 수준으로 나타났다. 하지만 요오드 섭취량의 경우에는 상한 섭취량 기준이 있는 미량 영양소인 만큼 섭취에 대한 지속적인 관심이 필요할 것으로 보인다. 또한, 요오드 섭취량 변화에 따른 갑상선 질환을 비롯한 다른 요오드 관련 질환이나 요인들과의 관련성을 살펴보기 위한 후속 연구들에 있어서 기초자료로 도움이 되길를 기대해본다.

• Nutrition Research and Practice
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• 제12권4호
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• pp.307-314
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• 2018

BACKGROUND/OBJECTIVES: Numerous researches have studied the association between sugar intake and obesity of children in many countries. This study was undertaken to investigate the association between beverage intake and obesity of children by reviewing a database for total sugar contents established in all foods and presented in a nutrition survey by the Korea National Health and Nutrition Examination Survey (KNHANES). SUBJECTS/METHODS: Data of 1,520 children aged 6-11 years in the 6th KNHANES (2013-2015) were analyzed for this study. A database for total sugar intake comprises the total sugar contents of all foods included in the results of a nutrition survey using the 24-hour recall method of 6th KNHANES. Beverages were categorized into carbonated beverages, fruit & vegetable drinks, other drinks, tea, and coffee. RESULTS: The average daily beverage intake of all children was 131.75 g/day, and the average daily total sugar intake in beverages was 13.76 g/day. Carbonated beverages had the highest intake rate (58.85 g/day) and also ranked highest for sugar intake (6.36 g/day). After adjusting for confounding variables, the odds ratio for obesity in children with beverage intake of ${\geq}200mL/day$ significantly increased by 1.83 times (95% CI, 1.11-3.00) as compared to children with beverage intake of < 200 mL/day. Also, a significant increase was observed in the odds ratio for obesity in total children (2.41 times; 95% CI, 1.35-4.33) and boys (3.15 times; 95% CI, 1.53-6.49) with carbonated beverage intake of ${\geq}200mL/day$ when compared with children who consumed < 200 mL/day. CONCLUSION: A positive association is observed between beverage intake and obesity in Korean children. In particular, an intake of carbonated beverages has a positive correlation with childhood obesity in boys. This study can therefore be used as scientific evidence for reducing sugar, and for the continuous management and research on beverages.

• Nutritional Sciences
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• 제7권2호
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• pp.113-120
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• 2004

This study was conducted to investigate variables related to dietary fiber intake among sixth grade children in an elementary school in Daejon city. One hundred and forty-seven children completed a questionnaire for determining their socioeconomic background and their food habits. Anthropometric measurements were taken, and a 24-hour diet recall method was used to collect three-day food intakes. The socioeconomic status of the children's families belonged to the upper middle class; 53.0% of their fathers and 25.8% of their mothers had completed college or higher degrees. 27.9% of the mothers had jobs, including part-time jobs. Approximately 30% of the children skipped breakfast, 66.4% of the children preferred animal foods to plant foods, and 52.4% of the children preferred green vegetables to yellow or pale vegetables. Grilled meat dishes, such as Grilled beef rib with seasoning, Bulgogi, grilled pork belly and beef steaks, were the most popular types of food eaten outside home by the children. Daily dietary fiber intake was 14.5 g in boys and 14.5 g in girls, and these intakes are low compared to the standard guidelines. The average intakes of energy and protein of the children were 84.5% and 114.0% of the Korean Recommended Dietary Allowances (RDAs), respectively. Besides energy, riboflavin, iron and calcium intakes were below the RDAs, and especially calcium intake was only 50% of the RDAs. On the other hand, thiamin, niacin, ascorbic acid, protein and phosphorus intakes exceeded the Korean RDAs. Family income or the children's body mass index (BMI) was not directly related to dietary fiber intakes. However, higher dietary fiber intakes tended to be related to higher intakes of green vegetables and fruits. Children with higher dietary fiber intake tended to prefer plant foods to animal foods. Energy and most nutrients, except heme iron and retinol, showed positive relationships with dietary fiber intake. Especially potassium and plant origin protein and calcium were highly correlated with dietary fiber intakes(r＞0.6). From these results, it is concluded that dietary fiber intakes of these sixth grade elementary school children were less than the standard reference and it is anticipated to decrease further in the future with increased incomes. Therefore, increased intakes of dietary fiber by elementary school children should be promoted through nutrition education, together with the development of cooking methods and recipes utilizing green vegetables and fruits.

• Journal of Nutrition and Health
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• 제45권3호
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• pp.229-239
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• 2012

The purpose of this study was to investigate and examine the relationship between dietary habits, food intake patterns, and depression in Korean women with polycystic ovary syndrome (PCOS). The Center for Epidemiologic Studies Depression Scale Korean Version was used to determine whether a participant was depressed or not. The dietary habits were assessed by the Min-Dietary Assessment (MDA) method, and food intake data were collected by the 24-hour recall method on two non-consecutive days, at least 7 days apart, and the average of the two days was used to estimate the usual dietary intake. The total MDA scores of the Depression Group was significantly lower than that of the No-Depression Group ($31.5{\pm}6.4$ vs $33.4{\pm}6.0$, p = 0.027). The intake of cereals/potatoes/sugar products, milk and milk products, plant protein, and calcium for the Depression Group were significantly lower compared to the No-Depression Group. The Depression Group had a significantly higher percentage of energy intakes from protein as well as the consumption of fish and shellfish compared to the No-Depression Group. There was a significant inverse relationship between milk and milk products consumption and the prevalence of depression [OR (95% CI) for the highest tertile compared to the lowest: 0.390 (0.177-0.857); p for trend = 0.016]. There were also significant positive relationships between the prevalence of depression and the consumption of the following: fish and shellfish [OR (95% CI) for the highest tertile compared to the lowest: 2.319 (1.128-4.770); p for trend = 0.009], animal protein (p for trend = 0.049), and the percentage of energy intakes from protein [OR (95% CI) for the highest tertile compared with the lowest: 2.546(1.156-5.609); p for trend = 0.025]. Further studies are needed in order to investigate whether the intake of protein and of animal protein is indeed associated with depression in PCOS patients in Korea and the possible mechanisms thereof. The results of our study can be applicable for the development of effective nutrition counseling and education programs regarding PCOS patients with depression as part of their successful treatment regimen.