• Journal of Yeungnam Medical Science
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• 제10권2호
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• pp.369-379
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• 1993

Dual energy x-ray absorptiometry(DEXA)를 이용하여 골밀도에 영향을 줄 인자가 없는 소아 80명을 대상으로 제2-4요추에서 골밀도를 측정하여 연령군과 Tanner stage의 변화에 따른 골밀도의 변화를 연구하고 골밀도와 연령, 체중, 신장, 골 연령, 성별, 혈청칼슘, 무기인, 부갑상선호르몬과 Alkaline phosphatase 등과의 상관관계를 알아본 결과, 골밀도는 연령(r=0.696), 체중(r=0.693), 신장(r=0.717), 골연령(r=0.690) 및 Tanner stage(r=0.636) 와 유의한 상관관계가 있었으나 (r>0.6) 골대사의 지표인 혈청 칼슘, 무기인, 부갑상선 호르몬 ALP나 성별과는 유의한 상관관계가 없었으며, 특히 남, 여 그리고 전체 환아 각각의 경우에서 연령, 체중, 신장과 골밀도의 직선적 상관관계(남아 : 연령 y=0.4223+0.0289x, 체중 y=0.3879+0.0087x, 신장 y=0.1362+0.0042x 여아 : 연령 y=0.3731+0.0494x, 체중 y=0.3206+0.014x, 신장 y=0.0782+0.0070x 전체 : 연령 y=0.4113+0.0354x, 체중 y=0.3690+0.0107x, 신장 y=0.0628+0.0051x)가 있었다. 연구대상 소아를 4개의 연령군(1군 : 2개월-1세미만, 2군 : 1세이상-5세이하, 3군 : 6세이상-10세이하, 4군 : 11세 이상-15세이하)으로 나누어 조사한 결과 연령군에 따른 골밀도($g/cm^2$)의 증가는 1군(BMD : $0.335{\pm}0.175$)과 2군(BMD : $0.627{\pm}0.200$) 그리고 3군(BMD : $0.714{\pm}0.1896$)과 4군(BMD : $0.873{\pm}0.163$)에서 유의하게 증가하였으나(P<0.05), 2군과 3군사이에서는 유의한 골밀도의 증가를 관찰할 수 없었으며 남녀간 골밀도의 차이는 없었다(p<0.05). 또한 Tanner stage의 발달에 따라서는 골밀도($g/cm^2$)는 Tanner stage 1에서는 $0.547{\pm}0.234$, Tanner stage 2에서는 $0.783{\pm}0.136$, Tanner stage 3에서는 $0.998{\pm}0.080$으로서 모든 단계에서 유의하게 증가하였다(p<0.05). 이상의 결과에 의하면 DEXA로 측정한 골밀도는 연령, 체중과 신장 등의 증가와 유의한 상관관계가 있고 이들은 성장 속도가 빠른 연령에서 유의하게 증가하였으며 특히 성적 성숙도의 발달에 따라 유의하게 증가하였다.

• 동아시아식생활학회지
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• 제23권5호
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• pp.519-532
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• 2013

The purpose of this study was to make a comparative analysis of dietary habits, snacks, eating out and fast-food intake between students with a relatively early sexual maturity and others with a relatively late sexual maturity in a bid to grasp the impact of dietary behaviors on sexual maturity. The subjects in this study were 565 boys and girls who resided in Seoul and Gyeonggi province. They included fifth- and sixth-grade school children and seventh-grade middle school students. To classify the selected students according to the level of sexual maturity, the students of the same month age were divided into two groups in consideration of the stage of their sexual maturity and that of the other age groups. The early mature group was significantly taller and weighed more than the late mature group irrespective of gender. According to Tanner stages, the boys of the early mature group reached a 3.03 stage of sexual maturity when the sexual organs were taken into account, and those of the late mature group reached a 1.50 stage of sexual maturity. The girls of the early mature group reached a 3.43 stage of sexual maturity on the basis of breast, and those of the late mature group reached a 2.73 stage of sexual maturity. Concerning eating out, the early mature group ate out more frequently than the late mature group. In regard to snacks, the early mature group had a snack more often. The findings of the study indicated that there were differences in physical development and some dietary behaviors according to sexual maturity. The early mature group had a snack and ate out relatively more often than the late mature group, which showed that some dietary behaviors had an impact on the sexual maturity of the teens who arrived at the age of puberty.

• Journal of Nutrition and Health
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• 제37권7호
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• pp.566-575
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• 2004

To compare the dietary intakes and body composition in the stage of puberty, this study was conducted with 360 girls aged 9 to 12 years in Seoul Korea. Girls's general information and 3-day diet records were collected, fat mass was measured by Inbody 3.0, bone mass at right calcaneus was measured by PIXI and pubertal development was self-assessed by picture of Tanner stages. The results are as follows: Girls who had breast development were 79.7% and 15.8% had pubic hair development. Mean of BMI, BMC and BMD were significantly higher at breast stage3+(19.6 kg/$m^2$, 1.62 kg, 0.47 g/$\textrm{cm}^2$) than at the breast stage2 (18.2 kg/$m^2$, 1.47 kg, 0.44 g/$\textrm{cm}^2$) or breast stage1(16.3 kg/$m^2$, 1.32 kg, 0.39 g/$\textrm{cm}^2$) (p < 0.001). Percent body fat of breast stage1, 2, and 3+ were 19.7%, 23.1%, 25.3% respectively and significantly increased during the puberty (p < 0.001). The mean of energy intake was 1629 kcal in stage1, 1664 kcal in stage2 and 1577 kcal in stage3+ showed significant difference in the breast stages (p < 0.05). Energy adjusted sodium intakes and crude fiber intakes were significantly higher in breast stage3 + than other breast stages. For zinc and iron, proportions of subjects with intake levels less than 75% of Korean RDA was over 40% and significantly higher in breast stage3+ than other stages (p < 0.05) ; for protein and vitamin E, the proportions of subjects with intake levels more than 125% RDA was significantly higher in the stage 1. The nutrient adequacy ratio (NAR) for protein and phosphorous was significantly lower in breast stage3+ than other stages. The food groups of seed and nut were 4.7 g/day, 2.3 g/day, 1.8 g/day, respectively, and was significantly higher in breast stage 1. In summary, mean of BMI, BMD, BMC and percent of body fat were increased with pubertal development, and those who had higher breast developmental stage showed a lower amount of consumption level in energy, seeds and nuts, and also showed a higher amount of consumption level in energy adjusted sodium and fiber among Korean girls.

• Animal cells and systems
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• 제13권1호
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• pp.59-69
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• 2009

This paper documents the defining morphological characteristics of the larval stages of Chionoecetes tanneri Rathbun, 1893, the grooved Tanner crab, from specimens reared in the laboratory. Chionoecetes tanneri larval stages include two zoeae and one megalopa. The first zoea is characterized by: six setae on the posterior margin of the carapace; postero-lateral spines on abdominal somites 3 and 4, extending beyond the posterior margin of adjacent somites and bearing 9-10 spinnules; 12 plumose setae and one stout distal plumose seta present on the margin of the scaphognathite of the maxilla; and one fused lateral spine and one articulated dorso-medial spine on each fork of the telson. The second zoea is characterized by: 9 setae on the postero-lateral margin of the carapace; a serrated mandible molar; a mandibular palp bud; 25-26 plumose setae on the margin of the scaphognathite of the maxilla; pereiopods with well-developed gills and buds; and four pairs of stout setae on the posterior margin of the telson. For the megalopal stage, the distinguishing characteristics include: a rostral spine equal in length to the supraorbital spine; six setae on the exopod of the uropod; and a single spine on the ischium of the second pereiopod. This study allows C. tanneri larvae to be distinguished from the larvae of known sympatric congeners. This information provides a basic taxonomic tool for researchers in fisheries management and zooplankton ecology who are addressing issues related to trophic interactions, metapopulation dynamics and ecosystem impacts in the evolving marine resource management strategies in the North Pacific, and those related to Chionoecetes species in particular.

• 대한예방의학회:학술대회논문집
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• 대한예방의학회 1994년도 교수 연수회(역학)
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• pp.158-163
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• 1994

Slightly elevated urinary albumin excretion rate (microalhuminuria) is a marker of early diabectic nephropathy, but it is unclear if the established definition of microalbuminuria ($20-200{\mu}g/min$) is correct for children and adolescents. We investigated th.: albumin excretion rate, albumin/creatinine ratio and urinary albumin concentration in 150 healthy schoolchildren and adolescents to (a) obtain a reterence value for albumin excretion rate, (b) relate albumin excretion to pubertal stages and (c) evaluate albumin/creatinine ratio and morning albumin concentration as screening methods for elevated albumin excretion rate. Albumin concentration was measured by immunoturbidimetry in timed overnight urine samples. The albumin excretion showed a skewed distribution (geometric mean $3.2{\mu}g/min$, 95 percentile ($15.1{\mu}g/min$). In girls. a peak in the albumin excretion rate was found at the pubertal stage 4 (Tanner) and in boys at stage 5. Albumin/creatinine ratio of 2.5 mg/mmol as a screening level for elevated albumin excretion ($15{\mu}g/min$) showed a high positive (0.88) and negative (0.99) predictive value.

• 한국가정과교육학회지
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• 제23권3호
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• pp.185-200
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• 2011

본 연구의 목적은 초 중등 여학생의 외모관심도와 외모관리행동이 성 성숙, 자기개념과 어떠한 상관관계를 갖는지 파악하는데 있다. 이를 위하여 서울지역의 초 중등 여학생을 대상으로 설문조사를 실시하였다. 연구의 결과는 다음과 같다. 첫째, 외모관심도와 외모관리행동 모두 중학생이 초등학생보다 높게 나타났다. 둘째, 초등학생이 중학생보다 전체적으로 긍정적인 자기개념을 가지고 있었고 특히 가정자기가 유의하게 높았다. 셋째, Tanner Stage가 초등학생은 2,3단계로서 사춘기 초기 상태, 중학생은 3,4단계로서 성장 발육의 진행 상태에 있는 것으로 나타났다. 월경을 하는 학생의 비율이 초등학생은 33%에 불과한 반면, 중학생은 90%로 대부분이 월경을 하는 것으로 나타났다. 성 성숙에 대한 주관적인 느낌 역시 차이를 보여, 초등학생은 자신의 성 성숙 속도가 또래보다 빠르다고 느낄 때, 중학생은 느리다고 느낄 때 부정적인 느낌을 가졌다. 넷째, 초 중등 여학생의 외모관심도에 자기개념과 성 성숙이 미치는 영향을 살펴본 결과, 초등학생은 가정적 자기개념이 낮을수록, 사회적 자기개념이 높을수록 외모에 대한 관심이 높았다. 중학생은 사회적 자기개념이 높을수록, 가정적 자기개념이 낮을수록, 성숙에 대한 느낌이 부정적일수록, 신체적 자기개념이 높을수록 외모에 대한 관심이 높았다. 또한 초 중등 여학생의 외모관리행동에 외모관심도와 자기개념 및 성 성숙이 미치는 영향을 살펴본 결과, 초등학생은 외모관심이 높을수록 외모관리행동에 적극적이었다. 중학생의 외모관리행동은 외모에 대한 관심이 높을수록, 가정적 자기개념이 낮을수록, 사회적 자기개념이 높을수록 많이 하는 것으로 나타났다.

• Journal of Nutrition and Health
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• 제40권1호
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• pp.58-68
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• 2007

The associations between dietary, body composition and sexual maturation were investigated among Korean girls of pubertal age in this study. Dietary intakes were collected by 3 day food records, body compositions were measured by bio-impedence analyzer and sexual maturation stages were determined with a self-administrated questionnaire using Tanner stages in 1,114 girls 9-13 years of age. Girls were divided into early maturation (EM) and late maturation (LM), based on the comparative maturation stages of breast and pubic hair among the same age groups by months. Subjects were excluded if their stage of maturation could not be divided into early and late groups. EM and LM groups consisted of 42.8% and 38.9% of subjects by breast stage and 67.4% and 22.8% by pubic hair stage. Girls in LM group had significantly lower in height, weight and bone mineral contents (p < 0.05). When nutrient densities of average daily intake of the two groups were compared, folate density was significantly higher among the LM group of breast stages (p < 0.01), and Ca, P, K, Vit. $B_1$, Vit. $B_2$ and folate densities were significantly higher among the LM group of pubic hair stages (p < 0.05). These results show that intakes of some micronutrients differ between children with faster and slower sexual maturation velocities at early pubertal stages. More longitudinal studies are needed to confirm whether such differences are consistent throughout the pubertal period.

• Asian Pacific Journal of Cancer Prevention
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• 제17권1호
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• pp.65-71
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• 2016

Although high mammographic density is one of the strongest predictors of breast cancer risk, X-ray based mammography cannot be performed before the recommended screening age, especially not in adolescents and young women. Therefore, new techniques for breast density measurement are of interest. In this pilot study in Guam and Hawaii, we evaluated a radiation-free, bioimpedance device called Electrical Breast Densitometer$^{TM}$ (EBD; senoSENSE Medical Systems, Inc., Ontario, Canada) for measuring breast density in 95 women aged 31-82 years and 41 girls aged 8-18 years. Percent density (PD) was estimated in the women's most recent mammogram using a computer-assisted method. Correlation coefficients and linear regression were applied for statistical analysis. In adult women, mean EBD and PD values of the left and right breasts were $230{\pm}52$ and $226{\pm}50{\Omega}$ and $23.7{\pm}15.1$ and $24.2{\pm}15.2%$, respectively. The EBD measurements were inversely correlated with PD ($r_{Spearman}=-0.52$, p<0.0001); the correlation was stronger in Caucasians ($r_{Spearman}=-0.70$, p<0.0001) than Asians ($r_{Spearman}=-0.54$, p<0.01) and Native Hawaiian/Chamorro/Pacific Islanders ($r_{Spearman}=-0.34$, p=0.06). Using 4 categories of PD (<10, 10-25, 26-50, 51-75%), the respective mean EBD values were $256{\pm}32$, $249{\pm}41$, $202{\pm}46$, and $178{\pm}43{\Omega}$ (p<0.0001). In girls, the mean EBD values in the left and right breast were $148{\pm}40$ and $155{\pm}54{\Omega}$; EBD values decreased from Tanner stages 1 to 4 ($204{\pm}14$, $154{\pm}79$, $136{\pm}43$, and $119{\pm}16{\Omega}$ for stages 1-4, respectively) but were higher at Tanner stage 5 ($165{\pm}30{\Omega}$). With further development, this bioimpedance method may allow for investigations of breast development among adolescent, as well as assessment of breast cancer risk early in life and in populations without access to mammography.

• Journal of Preventive Medicine and Public Health
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• 제37권1호
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• pp.72-79
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• 2004

Objectives : This cross-sectional study aimed to quantify the relationship between the bone mineral density at the os calcis and the body mass composition in healthy children. Methods : The areal bone mineral density was measured at the os calcis with peripheral dual energy X-ray absorptiometry. The fat free mass, fat mass and percentage fat mass were measured using bioelectric impedance, in 237 Korean children, aged 9 to 12 years. The sexual maturity was determined by self assessment, using standardized series of the 5 Tanner stage drawings, accompanied by explanatory text. Results : From multiple linear regression models, adjusted for age, sexual maturity and height, the fat free mass was found to be the best predictor of the calcaneal bone mineral density in both sexes. About 15 and 20% variabilities were found in the calcaneal bone mineral densities of the boys and girls, respectively, which can be explained by the fat free mass. After weight adjustment, the percentage fat mass was negatively associated with the calcaneal bone mineral density in both sexes. Conclusions : The findings of this study suggest that the fat free mass, among the body compositions, is the major determinant of bone mineral density at the os calcis in Korean children aged 9 to 12 years. Obesity, defined as the percentage fat mass, is assumed to have a negative effect on the calcaneal bone density in children of the same weight.

• Nutrition Research and Practice
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• 제5권6호
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• pp.569-577
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• 2011

The purpose of this study was to identify dietary patterns among Korean elementary school girls based on the change in body mass index (BMI), body fat, bone mineral density (BMD), and bone mineral content (BMC) during 22 months and to explore the characteristics of dietary patterns identified. Girls aged 9-11 years were recruited and 3-day dietary data were collected four times. Subjects with a diet record of 8 or more days and anthropometric data measured at baseline and 22 months later were included (n = 198). Reduced rank regression was utilized to derive dietary patterns using a change in BMI, body fat, and calcaneus BMD and BMC as response variables. Two dietary patterns were identified: the "Egg and Rice" dietary pattern and "Fruit, Nuts, Milk Beverage, Egg, Grain" (FNMBEG) dietary pattern. Subjects who had high score on the FNMBEG pattern consumed various food groups, including fruits, nuts and seeds, and dairy products, whereas subjects in the "Egg and Rice' dietary pattern group did not. Both dietary patterns showed a positive association with change in BMI and body fat. However, subjects who had a higher score on the "Egg and Rice" dietary pattern had less of a BMC increase, whereas subjects who had a higher score on the FMBEG dietary pattern had more increased BMC over 22 months after adjusting for age, body and bone mass, and Tanner stage at baseline. Our results provide evidence that a well-balanced diet contributes to lean body mass growth among young girls.