• Journal of Nutrition and Health
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• v.34 no.7
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• pp.786-796
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• 2001

To assess calcium and sodium and urinary excretion of preschool children in Busan and to evaluate the relationship of intakes of food and nutrient with urinary calcium excretion, calcium and sodium food frequencies of 25 common foods affecting intakes of calcium and sodium per week, nutrient intake by 24hr recall and 24hr urinary calcium and sodium excretion were measured with 97 preschool children. The mean calcium intake was 436.11mg and below RDA. The mean sodium intake was 1890.11mg. The mean urinary calcium and sodium excretion were 42.88mg and 735.25mg respectivery. The mean urinary calcium/creatinine ratio was 0.20. The urinary calcium excretion showed positive significant correlations with weight, intake frequency of pizza consumed per week and urinary sodium excretion (p<0.05, p<0.05, p<0.001). The urinary calcium excretion per milligram of creatinine showed positive significant correlations with intake frequencies of pizza and common squid consumed per week(p<0.01, p<0.05) and negative correlation with intake frequencies of pizza and common squid consumed per week(p<0.01, p<0.05) and negative correlation with age(p<0.05). No significant relations were found between urinary calcium and intakes of calcium, protein and phosphorus. Urinary sodium was found to be the most important determinant of urinary calcium excretion. Intake frequency of pizza consumed per week was found to be the most important determinant of urinary calcium excretion per milligram of creatinine. Based on the results, urinary calcium excretion was related to intake frequency of pizza consumed per week and urinary sodium excretion. Low calcium intake and increase of calcium loss in the urine potentiated by sodium intake during growth may reduce peak bone mass. So nutritional education is needed in order to increase calcium intake and decrease sodium intake, especially from food like pizza.

• Journal of Nutrition and Health
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• v.33 no.6
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• pp.647-659
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• 2000

o assess the food intake and the sodium and potassium intakes and urinary excretion of preschool children in Pusan and to evaluate the relationship among variables dietary behaviors food and nutrient intake and 24hr urinary sodium and potassium excretion were measured with 97 subjects. The mean sodium and potassium intakes were 1890. 1mg(82,2meq) and 1479.7mg(37.8meq) respectively. The mean potassium intake(p<0.05) and density(p<0.01) were significantly low at the group who had food intake pattern absen of fruit and daily groups. The mean urinary sodium and potassium excretion were 735.3mg(32.0meq) and 418.7mg(10.7meq) respectively. The mean sodium intake(p<0.01) and urinary excretion were 735.3mg(32.0meq) and 418.7mg(10.7meq) respectively. The mean sodium intake(p<0.01) and urinary excretion (p<0.001, p<0.001) energy intake(p<0.01) sodium intake and density (p<0.001, p<0.05) the food number and intake frequency of vegetable group consumed (p<0.01, p<0.01) dietary frequency score(p<0.05) and negative correlations with the food number and frequency of dairy group consumed (p<0.05 p<0.05) The urinary potassium excretion showed positive correlations with height and weight(p<0.05, p<0.01) urine volume and urinary creatinie excretion(p<0.01 p<0.001) potassium intake(p<0.05) food number and intake frequency of dairy group consumed (p<0.05, p<0.001). Based on the results urinary sodium excretion was related to age sodium intake and food intake of vegetable and dairy group and urinary potassium excretion was related to potassium intake and food intake of dairy group. So nutritional education is needed in order to decrease sodium intake especially from food intake of vegetable group when preschool children have less food intake of diary group,.

• Journal of Nutrition and Health
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• v.30 no.6
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• pp.669-678
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• 1997

This study was designed to estimate the sodium intake of preschool children . To determine the sodium intake & excretion of preschool children in Korea, dietary behaviors, anthropometry, intakes of dietary nutrients, urinary sodium excretion and preference for salty foods were measured in 42 preschool children (male 26 , female 16, average6.5 years old) and their mothers. The results are summarized as follows. Mean daily urinary sodium excretion was 52.7 mEq(1,212.1mg). This value did not show remarkable change compared with the other studied that were accomplished in the similarage group for about the last ten years. And the subjects showed lower preference for salty taste than those of elementary school children and adults. Mean daily lower preference for salty taste than those of elementary school children and adults. Mean daily urinary sodium excretion were significantly correlated with the frequency of eating out (p<0.01), potassium intake(p<0.001) and urinary sodium to potassium excretion ratio(p<0.001). But there weren't any correlations with mean daily sodium intake, blood pressure, dietary nutrients intake and the preference for salty taste.

• Journal of Nutrition and Health
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• v.20 no.4
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• pp.246-257
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• 1987

The present study was conducted to examine the effect of an increased level of dietary sodium on calcium excretion in 8 health young adult Korean women on a controlled diet. After adaptation period of 2 days, each subject received 2811.8$\pm$68.1 mgNa(day during the initial period of 5 days (low sodium period) and 6417.1$\pm$248.6mgNa(day during the following period of 5 days (high sodium period). Calcium intake was 593.7$\pm$15.7 mg Ca/day during the low sodium period of 596.1$\pm$25.1 Ca/day duing the high sodium period. When the low sodium period is compared with the high soidum period, the results were as following. 1) Mean urinary sodium excretion was significantly higher during the high sodium period (5760.1$\pm$156.5mg0 than during the low sodium period (2272.2$\pm$108.6mg)(P<0.001). Fecal sodium excretion of the high sodium period was also significantly higher than that of the low sodium period(P<0.001). Mean value of sodium balance during the high sodium period was higher than that of the low sodium period . However, the difference was not significant. 2) Mean urinary calcium excretion was significantly higher during the high sodium period than during the low sodium period ; mean value of the low sodium period was 124.7$\pm$11.3mg and that of the high sodium period was 202.6$\pm$17.2mg)P<0.001). Fecal calcium excretion was higher during the high sodium period (284.9$\pm$31.0mg) than during the low sodium period (253.9$\pm$15.3mg0, but there was no significance. Mean value of calcium balance during the high sodium period was significantly lower than that of the low sodium period(P<0.001). The above results show that high sodium intake increases calcium excretion as well as sodium excretion.

• Korean Journal of Community Nutrition
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• v.23 no.1
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• pp.38-47
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• 2018

Purpose: The aim of this study was to analyze the association between sodium excretion and obesity for healthy adults in the Gwangju area. Methods: The participants included 80 healthy adults aged 19 to 69 years in Gwangju. The dietary intake and sodium excretion were obtained using the 24-hour recall method and 24 hour urine collection. The participants were classified into two groups according to the amount of urinary sodium excretion: (${\leq}141.75mmol/dL$, > 141.75 mmol/dL). Results: After adjusting for sex, age, smoking history, and income, the high excretion of sodium group was significantly higher for weight, body mass index, body fat mass, percent body fat, visceral fat area (VFA), waist circumference, hip circumference, and WHR. The energy and nutrients intake were significant after adjusting for sex, age, smoking history, and income. The LSE group had a significantly higher fat intake and Na/K intake ratio. The HSE group had significantly higher fiber intake, and K intake. As the amount of urinary sodium excretion increased, the risk of obesity before correction was 3.57 (95% CI: 1.13-11.25) times greater, and the risk of obesity of T3 increased significantly by 3.33 times (95% CI: 1.05-10.59). After correcting for sex and age, the obesity risk of T2 increased significantly by 4.23 times (95% CI: 1.11-16.06), and after correcting for sex, age, smoking history, and income, the obesity risk of T2 increased significantly by 6.81 times (95% CI: 1.44-32.19) the risk of obesity. Conclusions: An association exists between sodium excretion and obesity in Korean adults. In this study, the high excretion of sodium group was obese and the risk of obesity was higher than the low excretion of sodium group.

• Journal of Nutrition and Health
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• v.46 no.1
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• pp.26-33
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• 2013

The purpose of this study was to investigate the sodium intake of office workers using 24-hour urine analysis and to analyze the correlation matrix between variables. The sodium intake of the subjects (n = 137), based on a 24-hr sodium excretion period, was male (n = 56) 6072.4 mg and female (n = 81) 5,168.2 mg. Urinary sodium excretion showed significant positive correlation with BMI, frequency of eating out, expenditure of eating out, salty taste assessment and high-salt dietary behavior. Analysis of urinary sodium excretion showed significant positive correlation with intake frequencies of cabbage kimchi, broiled fish, feast noodle and rice with leaf wraps. Based on the results of multiple regression, urinary sodium excretion was found to be related to intake frequencies of cabbage kimchi, broiled fish, rice with leaf wraps and high score of high-salt dietary behavior.

• Journal of Nutrition and Health
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• v.19 no.6
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• pp.355-362
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• 1986

The purpose of this study was to estimate the urinary excretion of sodium cho\ulcornerloride of adolescent in Jeon Bug. Korea and to evaluate the correlation of sodium chloride excretion by sex and area. The subjects were 261 healthy persons of 16 years old ( male 131. fermale 130) which were randomly choosen from different areas (city, farming area and fishing area). The urinary sodium chloride excretion in 24hrs were evaluated. which were cal\ulcornerculated from the analysis of urine sample gathered for 12hrs. The results were as follows; 1) The urinary excretion of sodium chloride by the group of male and female in 24hrs were 388.0$\pm$191.4mEq(22.68$\pm$l1.19gm) and 303.6\ulcorner138.0mEq(l7.75$\pm$8.07gm) reo spectively. 2) The urinary excretion of sodium chloride by the group of male was higher than by the group of female. 3) The urinary excretion of sodium chloride by the group of city, farming area and fishing area in 24hrs. were 256.2$\pm$96.8mEq(14.97$\pm$5.66 gm), 433.2$\pm$188.6 mEq (25.32$\pm$l1.62gm) and 356.0$\pm$169.8mEq (20.81$\pm$.92gm) respectively. 4) The urinary excretion of sodium chloride by the farming area group and the fishing area group were higher than the city group. Hence the daily urinary excretion of sodium chloride by adolescent of 16years old was estimated to be 20.21$\pm$9.63gm.

• The Korean Journal of Physiology
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• v.9 no.2
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• pp.33-39
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• 1975

Changes of urinary aldosterone excretion, concurrent sodium and potassium excretion following furosemide administration were studied in normotensive young Korean with high sodium intake, moderate sodium restriction and marked sodium depletion. After intravenous injection of furosemd 40mg, plasma and urine samples were collected at every thirty minutes for two hours. Plasma-and urinary aldosterone, electrolyte concentration and urine flow rate were measured by means of radioimmunoassay or flamephotometry. Relations of urinary aldosterone to concurrent sodium or potassium/sodium ratio, and of urinary aldosterone to concurrent plasma aldosterone activity were studied. Following were the results: 1. Furosemide administration resulted in a increased urinary aldosterone concentration and unchanged or somewhat decreased sodium concentration in course of time after the injection. 2. Urinary potassium concentration showed initial decrease and subsequent increase in course of time after furosemide administration and it resulted in a gradual increase in urinary potassium/sodium ratio. 3. Studying the relations between urinary aldosterone excretion and potassium/sodium excretion ratio, or sodium excretion were meaningless because of the urinary flow rate after the injection was decreased with time course. 4. Furosemide administration showed a good relationship of urinary aldosterone concentration to concurrent potassium/sodium ratio rather than concurrent sodium concentration in subjects with sodium restriction, but no meaningful relationship was detected in subjects with high sodium intake because increasing rate of the ratio was not so wide. 5. Furosemide also resulted a reasonable relation of plasma aldosterone concentration to concurrent urinary aldosterone concentration especially during low sodium intake. 6. Above results suggested that relation of urinary aldosterone concentration to K/Na ratio following furosemide administration during sodium restriction is significant and has a benefit to reduce the variation induced by kalemic change showing in the diragram for daily aldosterone to sodium excretion.

• Korean Journal of Community Nutrition
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• v.20 no.6
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• pp.460-467
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• 2015

Objectives: Excess sodium intake has been linked to obesity and obesity-related indices. However, the scientific evidence for this association is inadequate. The purpose of this study was to investigate the association between urinary sodium excretion and obesity-related indices among Korean adults. Methods: A convenience sample of 120 subjects (60 obese and 60 non-obese subjects) were recruited applying frequency matching for sex and age between two groups. Sodium intake level was assessed through 24-hour urine collection. Obesity-related metabolic risk factors, including fasting blood lipid indices, subcutaneous and visceral fat through computed tomography (CT), insulin resistance indices, blood pressure and liver enzymes were measured in all subjects. These obesity-related metabolic risk factors were compared between obese and non-obese group according to sodium excretion levels (<110 mEq/day, 110~180 mEq/day, >180 mEq/day). Results: After adjusting for age, gender, health behaviors (smoking, exercise, drinking), and energy intake, several obesity-related metabolic risk factors, including abdominal circumference, body fat percentage, subcutaneous and visceral fat, triglyceride, and systolic blood pressure were found to be significantly deteriorated as the sodium excretion level increases. In addition, multivariate adjusted-odds ratios of abdominal obesity, high blood triglyceride, and high blood pressure were found significantly higher in the highest sodium excretion group compared to the lowest group. The mean number of metabolic syndrome risk factors was also significantly greater in the highest sodium excretion group than in the lowest group. Conclusions: The current study findings suggested that high sodium intake can affect obesity and metabolic syndrome risk negatively, implying the necessity of future research on low-sodium diet intervention in relation to obesity and related health problems.

• Korean Journal of Community Nutrition
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• v.16 no.2
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• pp.215-226
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• 2011

The purpose of this study was to assess calcium and sodium intakes and urinary excretion of adults in Busan and to evaluate the relationship between urinary calcium excretion (UCa) and the status of anthropometric, blood pressure, urine analysis, and nutrient intake of subjects. Nutrient intake by 24 hr recall, 24 hr urinary calcium and sodium excretion (UNa) were measured with 87 adults aged 20-59 yrs (42 men and 45 women). The mean calcium intake was 88.0% for men and 103.0% for women of Recommended Intake. The mean sodium intake was 283.4% for men and 250.5% for women of Adequate Intake (AI). The mean 24hr UCa was 127.4 mg in men and 107.3 mg in women. The mean 24 hr UNa was 3650.6mg in men and 3276.4mg in women. The intake and urinary excretion of calcium and sodium were not significantly different by gender. UCa showed significantly positive correlations with sodium intake and UNa in men (p < 0.001, p < 0.05) and women (p < 0.001, p < 0.001) and with age, systolic blood pressure (SBP) and sodium density in women (p < 0.05, p < 0.05, p<0.01). The UCa/creatinine showed significantly positive correlations with age, sodium intake, sodium density, and UNa in women (p < 0.05, p < 0.01, p < 0.01, p < 0.01). When UCa was stratified into quartile (Q1-Q4), age, SBP, UCa, UNa, sodium intake, and AI percentage of sodium (p < 0.01, p < 0.05, p < 0.001, p < 0.001, p < 0.001, p < 0.001) were significantly higher in Q4. The mean intake and AI percentage of sodium in Q4 were 4768.8mg and 329.0. Based on the results, UCa was related to age, SBP, UNa, and sodium intake. Therefore, nutritional education of decreasing sodium intake for decreasing UCa is needed.