• 한국방사선학회논문지
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• 제14권7호
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• pp.863-870
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• 2020

본 연구는 연령대별로 복부 초음파 검사로 진단된 지방간 등급과 고지혈증 및 비만 지표와의 상관관계를 분석하고자 하였다. 충북 소재 H검진센터에서 복부초음파 검사를 받은 다양한 성별 및 나이대의 총 1470명의 검진자들을 대상으로 하였다. 복부 초음파 검사로 진행된 검진자들을 연령대별(20대, 30대, 40대, 50대, 60대 이상)로 정상과 지방간 환자로 분류하였다. 지방간의 정도는 세부적으로 경도, 중등도, 고도로 분류하였다. 고지혈증 지표로 총콜레스테롤, 중성지방, 저밀도 및 고밀도지질단백 콜레스테롤을 대상으로 하였으며, 비만지표로 신장, 체중, 체질량지수, 허리둘레를 검사하였다. 통계 분석은 연령대별 인구학적 기술통계분석과 빈도분석을 수행하였다. 고지혈증과 비만 지표의 평균의 차이와 상관관계를 분석하였다. 그 결과, 고령일수록 성별과 관계없이 지방간이 있었으며, 모든 연령대에서 중성지방, 고밀도지단백질 콜레스테롤, 체중, 체질량지수, 허리둘레가 지방간 유무의 유의한 차이를 보였다. 지방간의 정도에 따른 연령대별 상관관계에서는 허리둘레와 체질량지수가 가장 높은 양(+)의 상관관계를 보였다.

• 대한방사선기술학회지:방사선기술과학
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• 제31권3호
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• pp.277-285
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• 2008

MRI를 이용하여 정상의 뇌량 크기를 측정한 결과 다음과 같은 결론을 얻었다. 1. 전체 대상자의 부위별 평균, 최소, 최대 1) Anteroposterior length는 평균 69.30mm, 최소 50.70mm, 최대 80.40mm이었다. 2) Diameter of genu는 평균 11.93mm, 최소 6.00mm, 최대 18.50mm이었다. 3) Diameter of mid body는 평균 7.00mm, 최소 3.40mm, 최대 10.40mm이었다. 4) Diameter of narrowing portion은 평균 4.51mm, 최소 0.80mm, 최대 9.50mm이었다. 5) Diameter of splenium은 평균 12.17mm, 최소 6.90mm, 최대 17.20mm이었다. 2. 전체 대상자의 성별에 따른 부위별 비교 1) Anteroposterior length는 남자가 여자보다 컸으며, 성별에 따라 유의미한 차이를 보였다. 2) Diameter of genu와 diameter of mid body, diameter of narrowing portion은 남자가 여자보다 컸으나 유의미한 차이는 아니었다. 3) Diameter of splenium은 남자가 여자보다 컸으며, 통계적으로도 유의미한 차이를 보였다. 3. 전체 대상자의 부위별 상관관계 1) Diameter of genu는 anteroposterior length와 통계적으로 유의미한 정적 상관관계를 보였다. 2) Diameter of mid body는 anteroposterior length, diameter of genu와 통계적으로 유의미한 정적 상관 관계를 보였다. 3) Diameter of narrowing portion은 anteroposterior length와 통계적으로 유의미한 상관관계를 보이지 않았으나 diameter of genu, diameter of mid body와 통계적으로 유의미한 정적 상관관계를 보였다. 4) Diameter of splenium은 anteroposterior length와 diameter of genu, diameter of mid body, 그리고 diameter of narrowing portion과 통계적으로 유의미한 정적 상관관계를 보였다.

• 한국관개배수논문집
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• 제18권1호
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• pp.25-32
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• 2011

In order to effectively manage the reservoir, reservoir water quality management should be based on physicochemical and configurational characteristics. In this research, correlation between factors affecting the reservoir water quality was examined. Chl-a and COD shows the highest positive correlation. Chl-a and T-P also has a high positive correlation, however Chl-a and T-N show lower correlation relatively. Even though T-N is an important factor for phytoplankton growth which increase Chl-a concentration, corelation of Ch1-a and T-N shows that enough nitrogen in the reservoir isn't no longer limiting factor. The age of reservoir can cause of increasing COD and SS. Embankment height and elevation of reservoirs shows strong negative correlation to water quality. That means reservoir which is higher embankment height and locate in higher elevations is less contaminated. Regression expression was derived with Chl-a and water quality parameters, and height of reservoir. Finally Chl-a was simulated using regression expression and it was a good approach to predict the Chl-a concentration.

• Journal of Nutrition and Health
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• 제22권1호
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• pp.23-31
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• 1989

The purpose of this study was to evaluate the validity of various dietary methods. Dietary intake of 24 patients on regular diet was investigated by three methods. One method was a precise weighing method, the others were 24-hour dietary recall method and convenient dietary questionnaries. The results obtained are summarized as followes ; 1) There were no significant differences in mean nutrient intake of subjects among three dietary survey methods. 2) The validity coefficient between the precise weighing method and 24-hour recall method, ranging from 0.26(fat) to 0.59(carbohydrate) showed significant correlation for carbohydrate, vitamin A, thiamin, riboflavin and ascorbic and intakes. 3) The validity coefficient between precise weighting method and covenient dietary questionnaires, ranging from 0.14(fat) to 0.80(vitamin A), showed a significant correlation for most nutrients. 4) Female showed higher correlation between the precise weighing method and 24-hour recall method than male subjects for most nutrients. However, there was no significant sexual difference of correlation between weighing method and convenient method. 5) The correlation coefficient between the precise weighing method and the other two methods by age group showed younger sujbects have a higher significant correlation than older subjects for most nutrients.

• Asian-Australasian Journal of Animal Sciences
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• 제7권1호
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• pp.119-124
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• 1994

Experiments were performed to determine age-associated changes in ornithine decarboxylase (ODC) gene and Ha-ras cellular oncogene expression in tissues of female rats. In the kidney, ODC mRNA levels did not show age-associated changes, while ODC enzyme activities were decreased with advancing age from 3 to 10 months. These results suggest that post-transcriptional mechanism (s) are involved in the age-dependent decrease in renal ODC enzyme activity. In addition, we found no correlation between testosterone-induced renal ODC expression and DNA methylation pattern. Ha-ras mRNA levels in brain decreased as animals aged from 3 to 6 months, while renal Ha-ras mRNA levels were not influenced by age. Results demonstrate the age-dependent expression of Ha-ras in a tissue-specific manner.

• Journal of Oral Medicine and Pain
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• 제10권1호
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• pp.53-62
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• 1985

This study was undertaken to obtain the data for age determination following the calcification degree of the third molar in the point of forensic odontology. The orthopantomograms of 1399 male and 2517 female ranging from 7 to 22 years of age were studied. The developmental state of the third molar was divided into 12 stages following the calcification degree and the mean ages of stage was obtained and statistically analyzed. The results were as follows : 1. There was remarkable correlation between the development of the third molar and age. 2. There was no significant developmental difference between the right and left third molar. 3. The development of the third molar presents difference between the male and female in the crown formation stages, but it was retarded in female than male in the root formation stages. 4. At the age under 20 years, we can determine the age within the range of * 2 years by means of orthopantomogram.

• The Journal of Korean Physical Therapy
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• 제14권4호
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• pp.45-54
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• 2002

The purpose of this study was to describe the gait pattern and parameters of the healthy elderly over 65years of age by the GATERite system. The subjects were sorted into two groups, depending on their sex: male and female. And female subjects were sorted into three groups, depending on their age. From time parameters and space parameters of gait cycle, between groups, the following results were made. The time parameters such as cadence, velocity, step time, single support and double support were the less the male than the female. And the higher age, the lower value except 80 age group, while no statistically significant. The space parameters(step length and stride length) were the longer the male than the female, and the higher age, the lower value while no statistically signigicant. The functional ambulation profile was high correlation with time and space parameters statistically significant.

• Journal of Oral Medicine and Pain
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• 제14권1호
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• pp.43-55
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• 1989

The need of age estimation for identification was increased by complexity of society, and the tooth was used widely for age estimation because of less individual deviation than the other organ. The age estimation using the tooth had several methods. Recently, the one using the racemization of aminoacid in the tooth was admitted more accurate than the other methods, especially in old age. But, this study was not tried in our country, and I would report the result of experiment about age estimation using racemization of dentine. I selected 40-Whole dentine sample from extracted teeth, those were reserved in natural dried condition for 2 weeks~ 1year and calculated the estimation of age from the ratio of D-aminoacid and L-aminoacid (D/L ratio) using gaschromatography and the results were below. 1. The aminoacids showed apparent K/L ratio in dentine were aspartic acid, serine. 2. The aspartic acid showed the highest racemic rate and its rate was 0.0012$\pm$0.0003/yr. 3. The relation between the actual age and K/L ratio was very positive correlation(r+0.954) in the estimation of age using aspartic acid. 4. The deviation between the estimated age using D/L ratio of aspartic acid and actual age was $\pm$3.32.

• Parasites, Hosts and Diseases
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• 제37권1호
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• pp.33-37
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• 1999

An age-dependent aspect of resistance to Cryptosporidium muris (strain MCR) infection was monitored in Syrian golden hamsters. Mesocricetus auratus. at 1-, 5- and 10-week of age and in ICR mice, Mus musculus, at 3-, 12-, and 15-week of age orally inoculated with a single dose of $2{\times}10^6$ oocysts. respectively. The prepatent periods for both animals were similar, independent of age, but the patency was significantly longer in younger hamsters (P<0.001) and a long tendency in younger mice. Hamsters infected at 1-week of age excreted about 10 times higher oocysts than those at 5- and 10-week of age. However, the total oocyst output was similar among mice of different ages. There was a good correlation between the length of the patency and the total oocyst output in hamsters (R=0.9646), but not in mice (R=0.456l). The immunogenicity of the parasite to homologous challenge infections was very strong in hamsters and relatively strong in mice. These results indicate that acquired resistance to C. muris infection is age-related and the innate resistance is independent of age of hamsters, and that both innate and acquired resistance, on the contrary, are irrespective of age of mice.

• Imaging Science in Dentistry
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• 제52권1호
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• pp.83-91
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• 2022

Purpose: This study assessed the associations between chronological age, dental maturation (DM), cervical vertebrae maturation (CVM), and hand-wrist maturation (HWM) in individuals aged 9-19 years. In addition, this study aimed to derive practical methods to evaluate the skeletal age using DM, CVM, or HWM for orthodontic, medical, and forensic purposes and to compare which of these 3 developmental parameters is more accurate for estimating the age of individuals in a Turkish population. Materials and Methods: Panoramic, lateral cephalometric, and hand-wrist radiographs of 284 patients aged 9-19 years were used in this study. The DM, CVM, and HWM stages were determined. The Kolmogorov-Smirnov, kappa, Wilcoxon, Kruskal-Wallis, chi-square, and Spearman correlation tests and simple linear regression analysis were used for statistical analysis. The significance level was 0.05. Results: Statistically significant differences were found between chronological age and DM, chronological age and CVM, and chronological age and HWM in both sexes (P<0.05). DM did not show statistically significant differences according to sex (P>0.05), but CVM and HWM were statistically different between males and females (P<0.05). The DM-estimated age yielded more accurate values than the other methods. Conclusion: All correlations between skeletal and dental stages were statistically significant. Our results showed that there was no statistically significant difference between chronological age and DM-estimated age. Therefore, it can be concluded that DM stages have the potential to be used for legal purposes.