• 대한통합의학회지
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• 제8권4호
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• pp.59-66
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• 2020

Purpose : This study aimed to present normative data for older Korean adults completing the Yonsei dual task cognitive screening test (Y-DuCog) and identify changes in cognitive function on the Montreal Cognitive Assessment - Korean (MoCA-K) with age. Methods : From May 2019 to August 2019, 195 healthy adults aged ≥60 years participated in this study. All participants completed the Y-DuCog to assess their dual-task performance and the MoCA-K to assess their cognitive function. Participants were divided into three groups based on their age: 60~69 years, 70~79 years, and ≥80 years. Results : The results of the Y-DuCog showed that dual-task performance time, effect, and correct response rate decreased significantly with age (p<.001). Scores from the three groups showed differences on all items (p<.001). Cognitive function on the MoCA-K also decreased significantly with age (mean score ± standard deviation [SD]; 27.33 ± 2.61 in subjects aged 60~69 years; 24.82 ± 3.20 in subjects aged 70~79 years; and 22.10 ± 4.91 in subjects aged ≥80 years; p<.001). Conclusions : Occupational therapists should be aware of the decline in cognitive function and dual-task performance time, effect, and correct response rate in older adults and consider interventions to treat this decline. Further studies are needed with larger groups of participants to examine factors, such as sex and education, that may impact dual-task performance and cognitive function.

• Fisheries and Aquatic Sciences
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• 제1권1호
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• pp.82-93
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• 1998

Monthly changes of the gonad follicle index (GFI), reproductive cycle, egg-diameter composition, first sexual maturity of the Pacific oyster, Crassostrea gigas, were studied based on the samples which have been collected from the intertidal zone of Poryong west coast of Korea, from January to December, 1996. C. gigas, is dioecious, while a few individuals are alternatively hermaphroditic. Monthly variation of gonad follicle index (GFI) used for determination of spawning period, coincided with the reproductive cycle. GFI increased from April when seawater temperatures gradually increased and reached the maximum in May. And then, GFI sharply decreased from June to September due to spawning. Reproductive cycle of this species can be divided into five successive stages: in females, early active stage (March to April), late active stage (April to May), ripe stage (May to August), partially spawned stage (June to September) and spent/inactive stage (September to February); in males, early active stage (February to March), late active stage (April to May), ripe stage (May to September), partially spawned stage (June to September) and spent/ inactive stage (September to February). The diameter of fully mature eggs are approximately 50um. Spawning occurred from June to September, and two spawning peaks were observed in June and August when the seawater temperature was above $20^{\circ}C$. Percentages of the first sexual maturity of males of 20.1-25.0 mm in shell height were over $50\%$, while those of females of 25.1-30.0 mm in shell height were over $50\%$. All the males of > 30.1 mm and all the females of ^gt; 35.1 mm completed their first sexual maturity. The results suggest that C. gigas has a protandry phenomenon. Sex ratios of 919 oysters observed were 453 females $(49.29\%)$, 429 males $(46.68\%)$, 16 hermaphrodites $(1.74\%)$, and 21 indeterminate individuals $(2.29\%)$. In age class I, sex ratio of males were $64.00\%$, thus, a higher percentage than that of females. It was noted that $64.00\%$ of the young males (age class I) were more functional than females in age class I, but 2-3 year-old oysters showed higher percentage of females. Percentages of hemaphrodites in 2-3 year classes were relatively higher than those in other year classes. Histological pattern of hermaphrodites can be divided into two types: Type I (hermaphrodite having a number of newly formed developing oocytes on the oogenic tissues within a degenerating spermatogenic follicle after discharge of numerous spermatozoa) and Type II (hermaphrodite having two separate follicles in the same gonad).

• Clinical and Experimental Pediatrics
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• 제50권8호
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• pp.732-739
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• 2007

목 적 : 임신주수에 따른 출생체중의 정상치는 하나의 기준으로 모든 인종, 국가, 시대를 만족시킬 수 없으며 각 인종별, 국가별로 다른 기준을 가져야 한다. 현재 우리나라에서 현재 사용되고 있는 임신주수별 출생체중의 기준치들은 우리나라의 실정에 맞지 않고 각각의 성별, 태아수별, 분만횟수별 기준치도 따로 분류되어 있지 않은 실정이다. 이에 우리나라의 성별, 태아수별, 분만횟수별 임신주수에 따른 기준치를 제시하고 각각을 비교하기 위해 이 연구를 시행하였다. 방 법 : 2000년부터 2004년까지 5년간 통계청의 인구동태자료 중 출생자료에 기록되어 있는 2,658,156명중 임신주수 24주에서 42주까지의 신생아 2,585,516명을 대상으로 Finite mixture model을 이용하여 임신주수별 출생체중을 분석하고 오류를 제거한 후 성별, 태아수별, 분만횟수별 기준치를 만들고 이를 비교하였고 우리나라에서 사용하고 있는 기준치와 비교하였다. 결 과 : 남아의 평균 출생체중은 $3,326{\pm}442g$, 여아의 평균 출생체중은 $3,225{\pm}428g$으로 남아가 더 무거웠으며 임신주수에 따른 출생체중도 전 임신주수에서 남아가 더 무거웠다. 단태아의 평균 출생체중은 $3,278{\pm}438g$, 쌍태아의 평균 출생체중은 $2,443{\pm}464g$으로 단태아가 더 무거웠으며 임신주수에 따른 출생체중도 전 임신주수에서 단태아가 더 무거웠다. 첫째아이의 평균 출생체중은 $3,264{\pm}440g$, 둘째아이의 평균 출생체중은 $3,282{\pm}428g$으로 둘째아기가 더 무거웠으며 임신주수에 따른 출생체중은 전 임신주수에서 둘째아기가 더 무거웠다. 단태아의 임신주수별 출생체중을 Lubchenco 등의 기준과 비교해 보았을 때 10th percentile과 50th percentile에서 우리나라 신생아의 출생체중 기준보다 전반적으로 무거웠고, Alexander 등의 기준과 비교해 보면 50th percentile 과 90th percentile 은 우리나라 신생아의 출생체중 기준에 비해 무거웠다. 결 론 : 본 연구에서 얻은 성별, 태아수별, 분만횟수별 임신주수별 출생체중의 유형은 다른 연구자들의 결과와 비슷했다. 또한 본 연구에서 얻은 임신주수에 따른 출생체중의 기준치는 5년간 우리나라 출생아 전수를 대상으로 객관적인 기준에 의해 오류를 제거하고 만들어 진 것이다. 그러므로 우리나라의 신생아의 임신주수에 의한 출생체중의 기준 및 자궁내발육부전이나 과체중출생아의 진단 기준으로 사용할 수 있으리라 생각된다.

• Journal of Periodontal and Implant Science
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• 제24권3호
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• pp.458-471
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• 1994

To evaluate the periodontal status of Korean adults, 3,988 adults(20-69 years old) who lived in Kwangju, Chonnam, Taegu, and Kyungbuk districts were periodontally examined by plaque index(PI), calculus index(CI), gingival index(GI), periodontal disease index (PDI), and papillary bleeding index(PBI). The periodontal examination charts were grouped according to age and sex. And subsequently 200 periodontal examination charts in each age group were randomly selected according to sex. The differences of the indices among age groups and those between male and female in each age group were statistically analyzed by Chi-Square test. In PI, CI, GI, PDI, and PBI, there was no statistical significance in the difference between male and female in each age group(p>0.05). In male, PI of 60s age group($1.44{\pm}0.68$) was significantly higher than that of any age group(p<0.05), and in female PI of 20s age group($0.86{\pm}0.39$) was significantly lower than that of any other age group(p<0.05). CI of 60s age group in both male($1.67{\pm}0.70$) and female($1.63{\pm}0.91$) was significantly higher than that of any age group(p<0.05). GI of 20s age group in both male($0.85{\pm}0.66$) and female($0.67{\pm}0.60$) was significantly lower and GI of 60s age group in both male($1.37{\pm}0.60$) and female($1.44{\pm}0.84$) was higher than that of any age group(p<0.05). PDI in male was the lowest in 20s age group($0.70{\pm}0.73$), and was the highest in 60s age group($4.93{\pm}1.96$) (p<0.05). In female PDI of 20s age group($0.71{\pm}0.74$) was significantly lower than that of any age group(p<0.05). In male PBI of 20s age group($0.38{\pm}0.31$) was significantly lower than that of any age group(p<0.001). PBI in female was the lowest in 20s age group($0.35{\pm}0.30$) (p<0.001), and was the highest in 60s age group($1.09{\pm}0.76$) (p<0.05). The data insist that all the young populations of 20s age group should be interested in routine check for early diagnosis and prevention of periodontal disease, and a special education program of periodontal health care for young generation must be prepared, and the periodic recall check system for periodontal examination of middle age group must be supported by government.

• Imaging Science in Dentistry
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• 제52권3호
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• pp.239-244
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• 2022

Purpose: Despite the proliferation of numerous morphometric and anthropometric methods for sex identification based on linear, angular, and regional measurements of various parts of the body, these methods are subject to error due to the observer's knowledge and expertise. This study aimed to explore the possibility of automated sex determination using convolutional neural networks(CNNs) based on lateral cephalometric radiographs. Materials and Methods: Lateral cephalometric radiographs of 1,476 Iranian subjects (794 women and 682 men) from 18 to 49 years of age were included. Lateral cephalometric radiographs were considered as a network input and output layer including 2 classes(male and female). Eighty percent of the data was used as a training set and the rest as a test set. Hyperparameter tuning of each network was done after preprocessing and data augmentation steps. The predictive performance of different architectures (DenseNet, ResNet, and VGG) was evaluated based on their accuracy in test sets. Results: The CNN based on the DenseNet121 architecture, with an overall accuracy of 90%, had the best predictive power in sex determination. The prediction accuracy of this model was almost equal for men and women. Furthermore, with all architectures, the use of transfer learning improved predictive performance. Conclusion: The results confirmed that a CNN could predict a person's sex with high accuracy. This prediction was independent of human bias because feature extraction was done automatically. However, for more accurate sex determination on a wider scale, further studies with larger sample sizes are desirable.

• 한국식품영양과학회지
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• 제35권9호
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• pp.1207-1214
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• 2006

본 연구에서는 최근 구축된 한국인의 상용 식품에 대한 식이섬유 데이터베이스를 사용하여 2001년 국민건강 영양조사 보고서에 나타난 1인 1일 평균 식품 섭취 자료를 토대로 한국인의 연령별, 성별 평균 식이섬유 추정 섭취량을 산출하고 식이섬유의 주요 급원식품군 및 10대 단일 식품급원을 분석하였다. 우리나라 사람들의 연령별 식이섬유의 추정 섭취량 평균치는 1세에서 49세까지는 연령의 증가와 함께 증가하였으나 50세 이후에는 감소하는 것으로 나타났다. 에너지 섭취 기준 식이섬유의 추정 섭취량은 1세에서 64세까지 지속적으로 증가하였다. 한국인의 영양섭취기준의 식이섬유 충분섭취량(12 g/1,000 kcal)의 충족률은 평균적으로 49세까지는 미달되었으며 50세 이후는 충족되었고 미달의 정도는 연령이 낮을수록 심한 것으로 나타났다. 채소류, 곡류, 과실류는 우리나라 사람들에서 연령에 관계없이 식이섬유의 3대 주요 급원식품군이며 이 세 식품군으로부터 섬유 섭취량의 약 75%를 얻고 있었다. 한국인의 식이섬유 섭취에 기여하는 10대 주요 단일식품들의 식이섬유 총 섭취량에 대한 기여비율은 유아기와 노년기에 다른 연령대에 비해 가장 높게 나타나 이 시기의 식품 섭취의 다양성이 낮음을 알 수 있었다. 쌀은 우리나라 유아들과 아동들의 제1의 섬유급원 식품이었고 배추김치와 쌀은 청소년기 이후 노년기까지 우리나라 사람들에서 변함없이 가장 중요한 섬유섭취의 급원임이 확인되었다. 연령대별로 식이섬유의 주요 급원식품의 종류와 순위가 차이를 보였으며 이것은 연령에 따라 식품 기호도가 상이함을 반영한다고 볼 수 있다. 남녀 성별 평균 식이섬유 추정 섭취량은 남성(22.26 g/day 혹은 10.12 g/ 1,000 kcal)이 여성(19.63 g/day 혹은 11.07 g/1,000 kcal)에 비해 절대 섭취량은 높았으나 에너지기준 섭취량은 낮았다. 남녀 모두 식이섬유 섭취에 기여하는 주요 식품군은 차이가 없었으며 식이섬유의 단일 급원식품은 남녀 모두 배추김치와 쌀이 1, 2위였으며 여성들은 남성에 비해 과실류 식품들이 섬유급원에서 더 높은 우선순위를 차지하여 남녀별 식품 기호도의 차이를 반영하였다. 본 연구의 결과는 향후 한국인의 식이섬유 섭취기준을 설정하는데 보다 현실적인 참고자료로서 활용될 수 있다고 본다.

• 대한지역사회영양학회지
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• 제13권2호
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• pp.228-236
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• 2008

This study was carried out to investigate the Korean rice cake cognition and consumption patterns classified by age in Busan. The survey was conducted from November 21 to December 26, 2007 by questionnaires and data were analyzed by SPSS program. The results are summarized as follows: Forty one point two percent of the elementary school group, 29.0% of the high school group, 35.0% of 2,30's, 44.5% of 4,50's and 39.5% of over 60's took Korean rice cake once or twice per month. Sixty two point eight percent of elementary group, 44.0% of the high school group, 43.0% of 2,30's, 42.5% of 4,50's and 49.5% of over 60's preferred Korean rice cake. The most important basis for selecting rice cake was 'taste' in all of the subjects. The improvements for rice cake were indicated as taste, preservation and packing. As their age decreased, the score of preference for Gaepiduk, Danja, Dootupduk, Bookumi, Soemuriduk, Julpyun, Jorangi and Jungpyun were decreased. Songpyun, Garaeduk, Injulmi, Siruduk and Moojigaeduk were highly recognized as Korean rice cakes. There was a significant positive correlation between preference of rice cake and age, sex, obesity and recognition degree (p < 0.01). Therefore the understanding of the requirements of the subjects according to age and sex is needed to encourage them to choose Korean rice cake.

• 한국임상수의학회지
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• 제39권4호
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• pp.162-167
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• 2022

To determine the prevalence of breed, age, and sex of canine primary glaucoma by comparing previous reports in Korea. We included the medical records of dogs diagnosed with primary glaucoma who visited the veterinary medical teaching hospital of Seoul National University (SNU) from January 2011 to December 2020 and investigated their breed, age, and sex. All the patients underwent a full ophthalmic examination. We analyzed the results using a binary logistic regression analysis based on the Jindo dog, which was close to the mean value of the primary glaucoma incidence rate. Of the 14,587 dogs treated at the veterinary medical teaching hospital of SNU, 107 (0.73%) were diagnosed with primary glaucoma. Glaucoma occurred in 14 breeds, including the American Cocker Spaniel, Shih Tzu, Maltese, Pomeranian, Jindo dog, Mixed Breed, Pekinese, Toy Poodle, Samoyed, Shiba Inu, Miniature Pinscher, Boston Terrier, Labrador retriever, and Yorkshire Terrier. The mean age of onset of primary glaucoma was 7.8 ± 2.3 years. Primary glaucoma was observed in 53 spayed females, 11 females, 38 castrated males, and five males. Regardless of neutralization, the ratio of females to males was 1.5:1. This study showed that primary glaucoma was significantly higher in American Cocker Spaniels and higher in Shih Tzus than other breeds in Korea; they had the highest incidence of primary glaucoma at 7 and 8 years of age, respectively. Therefore, the two breeds should be carefully monitored for the occurrence of primary glaucoma when they approach 7 years of age.

• 치과방사선
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• 제14권1호
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• pp.51-59
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• 1984

The aim of this study was to investigate the thickness of angular cortex and bone density of mandible in normal person. Age changes and sex differences of those were comprised in this study. Material included 456 pantomographic views and 309 intraoral films taken by paralleling technic. 1. Conclusions from this study were as follows. The thickness of mandibular angular cortex increased with age in both sexes before 15 to 19-year-old group. And those were relatively constant in the age range from 20 to 49 years in male and in the age range from 20 to 39 years in female, but decreased after that age. 2. The thickness of mandibular angular cortex were larger in male than in female. And no significant differences between sexes were noted before 40 to 49-year-old group. 3. Changes of bone density with age were analogous to changes of thickness of mandibular angular cortex. Correlation coefficients between changes of bone density and age were arranged, and male group underwent comparatively low correlation while insignificant statistically in female gruop. And no significant differences between sexes were found in all age groups except 50 to 59-year-old group.

• Journal of Preventive Medicine and Public Health
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• 제11권1호
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• pp.14-23
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• 1978

This survey was conducted on a total 672 pulmonary tuberculosis patients who were registered at certain health center in Busan, during the period from July 15th to August 31st, 1977, based on Modified Cornell Medical Index(CMI) consisting of 70 questions. Number of 'Yes' response of an individual patients was collected by each large section of Modified CMI. The each number of 'Yes' response was standardized by mean of Z scoring. Z score was obtained by following formula. Z=50+10(Xi-m)/s M : means of 'Yes' response by each section for all subjects s : standard deviation of the mean Xi : number of 'Yes' response by each section in an individual patients The results of obtained were as follows: 1. The number of investigated cases were 672 (459 males and 213 females). The most prevalent group was 20-24 years old group as 18.4% by age, moderate advanced group as 50.8% by radiological diagnosis, INH+PAS+SM group as 34.7% by antituberculotics and unemployed group as 59.9% by occupation. By bacteriological examination of sputum, the rate of negative group was 60.5% and positive group was 39.5%. 2. Z score of complaints by sex was higher in female as 52.4 than in male as 48.9 in general. By radiological diagnosis, there was decreasing tendency with age in male but increasing tendency with age in female. 3. By age group, Z score of complaints was increasing tendency with age in male but there was non-significant differences in female. 4. By bacteriological examination of sputum, the Z score of complaints was increasing tendency with the more discharged bacteria in both sex generally. 5. By antituberculotics, INH group was revealed the highest Z score of complaints as 50.4 in male and INH+PAS group was the highest as 51.21 in female. 6. By occupation, agricultural and fisherman group was the highest as 53.5 and the next group was professional, technical and related workers, unemployed and sales workers in that order.