• 제목/요약/키워드: DID(Difference in difference)

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사회 및 환경요인에 따른 뇌졸중 환자의 기능적 독립성 비교 (The comparison of functional independence in stroke patients according to the social and envitonment factor)

  • 신홍철;강정일
    • PNF and Movement
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    • 제8권2호
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    • pp.37-46
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    • 2010
  • Purpose : The purpose of this study was to investigate the performance level of functional independence of the stroke patient. Methods : In order to find out the functional independence of stroke patient, 160 peoples, 80 peoples in a large city and 80 peoples in small-to-medium sized city, were questioned. Result : The results of this study were as follows: 1. Functional independence level due to social factor; The comparison of functional independence level between two groups showed significant difference in educational level, religion, family member, vocation, and medical fees(P<.05). However, the two groups did not show significant difference in spouse. 2. Functional independence level due to environment factor; The comparison of functional independence level between two groups showed significant difference in place of residence and residental environment(P<.05). However, each group did not show significant difference. Conclusion : These results suggest that realization of stable housing, educational level, various physical activities, and diversified family members is essential. Also, stable environment and social satisfaction are needed to maintain and improve the health of patient.

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THE UNIFORM CLT FOR MARTINGALE DIFFERENCE ARRAYS UNDER THE UNIFORMLY INTEGRABLE ENTROPY

  • Bae, Jong-Sig;Jun, Doo-Bae;Levental, Shlomo
    • 대한수학회보
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    • 제47권1호
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    • pp.39-51
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    • 2010
  • In this paper we consider the uniform central limit theorem for a martingale-difference array of a function-indexed stochastic process under the uniformly integrable entropy condition. We prove a maximal inequality for martingale-difference arrays of process indexed by a class of measurable functions by a method as Ziegler [19] did for triangular arrays of row wise independent process. The main tools are the Freedman inequality for the martingale-difference and a sub-Gaussian inequality based on the restricted chaining. The results of present paper generalizes those of Ziegler [19] and other results of independent problems. The results also generalizes those of Bae and Choi [3] to martingale-difference array of a function-indexed stochastic process. Finally, an application to classes of functions changing with n is given.

전남지역 초등학생의 수산물 인식에 대한 연구 (A Study on the Recognition of Marine Products in Elementary School Students in the Jeonnam Area)

  • 전은례;김경희;황금희;정난희
    • 한국식품영양학회지
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    • 제28권6호
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    • pp.1045-1055
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    • 2015
  • The purpose of this study was to investigate the eating habits and nutritional knowledge of elementary school students in regards to seafood in school meals. More than 80.6% of elementary school students reported an 'average' preference for seafood. While 'taste' and 'healthy food' were common reasons to prefer marine products, 'unpleasant taste and smell' was a common reason not to prefer seafood. Students in general stated 'eating if possible' as their attitude towards seafood in school meals, 38.1% responded 'eating all' as their intake level. There was a significant difference between preference for seafood by gender [boys, 3.44; girls, 3.64 (P<0.01)]. Also, students significantly difference preferred some types of seafood over others. The students who enjoyed eating seafood had more regular and balanced diets and a better attitude toward dietary life and health than did the counterparts who did not prefer seafood. A significant difference (P<0.05) in knowledge existed according to gender; girls had a higher level of knowledge than did boys.

선진자본주의국가 공적연금의 노인 빈곤완화효과 : 이중차분접근 (Poverty Alleviation Effect for the Old Aged of Public Pension in Advanced Capitalist Countries : a Difference in Difference Approach)

  • 지은정
    • 사회복지연구
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    • 제42권4호
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    • pp.263-293
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    • 2011
  • 본 연구는 OECD 선진자본주의 10개국 공적연금의 노인 빈곤완화효과를 복지체제를 감안하여 이중차분을 통해 분석하였다. 자료는 유럽의 고령자 패널인 SHARE(waveI~II)와 미국의 HRS(2004~2006)이다. 단순 이중차분 분석결과, 연금을 계속 수급하지 못하는 노인의 빈곤율은 악화되지만, 연금수급자의 빈곤율은 급감하였다. 이중차분을 통한 공적연금의 빈곤완화효과는 45.6%로, 기존의 pre/post방식의 빈곤완화효과보다 다소 크다. 하부집단으로 보면, pre/post 접근으로 측정한 보수주의 체제의 정책효과는 이중차분에 비해 과소평가되고, 사민주의와 자유주의는 과대평가되었다. 이중차분 회귀분석결과, 경제성장률은 유의한 영향을 미치지 않지만, 공적연금은 노인의 빈곤완화에 기여하는 것으로 나타났다. 또한 복지체제에 따라 공적연금의 빈곤완화효과가 다르다. 자유주의 체제에 비해 보수주의와 사민주의체제 공적연금의 빈곤완화효과가 큰 것으로 볼 수 있다.

Solution to Slow Down Myopia Progression

  • Jung, Ji-Won
    • 한국임상보건과학회지
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    • 제8권1호
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    • pp.1386-1397
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    • 2020
  • Purpose: To examine the effectiveness of various treatments; bifocal spectacles, orthokeratology, atropine, and time spent in outdoors; in slowing down the myopia progression for Asian adolescents (6-18age). Methods: The research focused on examining the most effective treatment in controlling myopia based on the literature sources that have been published. Through meta-analysis of various research papers that already has been done in this field, a lot of data was collected. For each treatment, the difference in axial length and spherical equivalent over time was measured and recorded. To quantitatively record the difference, both axial length and spherical equivalent was determined by value of control group value of treatment group. The paper compared the effectiveness of each treatment based on the data that was measured. Results: Adolescents who chose to spend time outdoors in order to slow down myopia progression had axial length difference of 0.03 mm and spherical equivalent difference of 0.17 D. Adolescents that used atropine had axial length difference of 0.36 mm and spherical equivalent difference of 0.92 D. Bifocal spectacle resulted in axial length difference of 0.21 mm and spherical equivalent difference of 0.59 D, and for orthokeratology 0.23 mm and 0.04 D, respectively. Axial length wise, myopia was most controlled by the atropine since there was a greatest difference between the group that got the treatment and the group that did not have the treatment. According to the spherical equivalent difference data, myopia was most controlled by atropine. Conclusion: Atropine showed the most effective result in controlling myopia among the four treatment. Again, compared to other three treatment, using atropine appeared to have greatest ability in slowing down myopia progression since adolescents who were treated with atropine had greatest difference from adolescents in the control group that had the same condition but didn't get the treatment. However, every treatment was only used for 2 or 3 years which is quite short time period to measure the long term effect of the four treatments. Also, since atropine is a pharmaceutical method to control myopia, it may harm adolescents' eyes compared to optical or environmental treatment.

The Effect of Light on Champagne Yeast Cell Growth and Ethanol Production Under Variable pH Conditions

  • Collins, Paul C.;Schnelle, Karl B.;Malaney, Jr.George W.;Tanner, Robert D.
    • KSBB Journal
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    • 제6권2호
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    • pp.189-194
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    • 1991
  • The effect of wtlitc light on unaeraten growth of Baker's yeast and the accompanying ethanol production has been studied in a batch process at 27$^{\circ}C$. Over the 80-hour period of the Champagne yeast process without pH control, the cull growth was inhibited by the fluorescent light. Another observed difference between the runs is that the drop and subsequent rise in redox potential occurred much sooner in the fermentation with light than in the fermentation without light. This preliminary study indicated that ethanol production could be enhanced by light as the cell concentration is repressed. The possible pathway, shift of the sugar substrate toward ethanol and away from cells was manifested by another difference as well. As observed under the microscope, many of the yeast cells grown under light budded without dividing by the normal fission process as they did in the dark. Furthermore, the undivided and branched (light grown) cell did not agglutinate at the end of the fermentation process as did the distinct spherical (dark grown) cells.

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중앙형 추간판탈출증의 진단에서 체열촬영의 의의 (A Study on the Infrared Thermographic Imaging in Diagnosis of the Central Type of Herniated Disc)

  • 송봉근;이종덕;박용현;송운용;김중길
    • Journal of Acupuncture Research
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    • 제15권2호
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    • pp.301-310
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    • 1998
  • Infrared thermographic imaging visualizes noninvasively various abnormal condition by detecting the skin temperature. As the imaging represents the objective condition by the changes in blood flow under the control of autonomic nervous system, it is used to diagnosis and monitor the lumboscral radiculopathy. And asymmetry is important in the diagnosis of disc herniation. The most common type of disc herniation occurs psoterolaterally. This frequently causes nerve root compression leading to a radiculopathy in the distribution of the involved nerve root, most of which also provoke the asymmetric changes in thermography. Central disc herniation, which accounts for 5% to 35% of disc herniation, is typically associated with low back pain. But radiculopathy is usually abscent unless central disc heriniaton is large enough to cause compression of the cauda equina. To evalute the diagnostic value of the thermographic imaging in the diagnosis of central disc herniation, the imaging of 15 normal subjects and 48 patients with central disc herniation documented by CT scan were analyzed. The patients had either bilateral radiculophathy or no radiculopathy. The imaging of patient group with non rediculopathy did not show any significant thermal difference to control. While bilateral radiculopathy group reveled hypothermic pattern compared twith control. Thermal difference between left and right side did not present any significance in non radiculopathy group but hypothermia in bilateral radiculopathy group. Large herniation group demonstrated hyperthemic pattern while the others showed no significant change. Cranial caudal thermal difference did not show any difference between experiment groups. These results shows that infrared thermographic imaging can be used central disc herniation with bilateral radiculopathy, while it seems to little useful on the diagnosis of non radiculopathic disc herniation.

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한국인(韓國人)의 혈청지질(血淸脂質) 연구(硏究) (A Study of Serum Lipid in Korean)

  • 이수영;김강석
    • 보험의학회지
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    • 제2권1호
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    • pp.101-115
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    • 1985
  • In Med Dept. Daehan Education Insurance, Total 690 cases(male 376 cases, female 314 cases) were inspected to study the change of serum lipid value. The objects of investigation were total cholesterol, HDL cholesterol, triglyceride, phospholipid and total lipid value. The results are as follows: 1) In the normal subjects, with the relation of serum lipid value and the age. triglyceride, phospholipid and total lipid value showed the increasing tendency by 70 age, but total cholesterol value and HDL cholesterol value showed the increasing tendency by 59 age and the decreasing tendency after 59 age. 2) In the normal subject the difference of serum lipid value between sexes did not make the significant difference of level statistically in all items which can be inspected. 3) The weight change and serum lipid value are very significantly related. Total cholesterol, HDL cholesterol and total lipid value are high in female if the weight is light. But they are high in male the weight is heavy phospholipid value is opposite to the above result. Triglyceride value is high in male regardless the weight, but the significant difference happened in the high weight group. 4) As serum lipid value of hypertension patients is compared with that of the normal subjects, HDL cholesterol, triglyceride, phospholipid and total lipid value are significantly high. 5) The doubtful group of the fatty infittration of liver among the hypertension pafients have very significant difference in serum lipid value compared with not only the value of the normal subject but also that of the obesity group. 6) The doubtless group of the fatty infitration of liver among the hypertension patients have the significant difference in all serum lipid value compared with that of the normal subject, but compared with the obesity group males had the significant difference of HDL cholesterol value and both sexes had the significant difference in total lipid value, but had no significant difference in total cholesterol, triglyceride and phosprolipid value. 7) The ratio of total cholesterol per HDL cholesterol had the significant difference in the doubtful hypertension patients of the fatty infittration of liver and the relative weight, but it had no significant difference compared with the normal subject in the doubtless hypertension patients.

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국내 브랜드 돈육과 수입산 돈육의 선호도 분석 (Analysis of Consumer Preferences for Branded and Imported Pork)

  • 김계웅;김민진;옥영수;김학연
    • 한국식생활문화학회지
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    • 제29권4호
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    • pp.342-347
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    • 2014
  • This survey was conducted to investigate consumer preferences for branded and imported pork, including favorite cooking styles. Data were collected from a total of 252 consumers and analyzed. The results are summarized as follows. Consumers of branded pork showed a moderate preference "moderate" (54%). There was no significant difference in consumer preference for branded pork according to educational level or living area. However, there was a significant difference according to yearly income (p<0.05). Consumers in the high-income group preferred branded pork more than those in the low-income group. Most consumers did not like imported pork (64.6%). There was no significant difference in consumer preference for imported pork according to educational level or living area, whereas there was in the yearly income group (p<0.05). Whereas low-income consumers did not like imported pork, high-income consumers did. The royalty for purchasing of branded pork was shown "3.65" out of 5 points. Whereas there was no significant difference according to educational level, there was for living area and yearly income (p<0.05). Consumers living in large cities or having low income showed high royalty of purchase for branded pork. The royalty for purchase of imported pork was "2.08" out of 5 points. Significant differences for purchase royalty of imported pork were observed according to educational level, living area, and yearly income group (p<0.05). Consumers responded that they liked roasted pork (47.6%). Secondly, consumers liked stew (16.7%). There were no significant differences among various cooking styles in any of the groups.

만성요통환자의 요천추 각도가 요부신전 근력에 미치는 영향 (Effect of lumbar extensor strength according to lumbosacral angle change on chronic lumbar back pain patients)

  • 김경태;박래준
    • The Journal of Korean Physical Therapy
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    • 제16권1호
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    • pp.14-31
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    • 2004
  • The Purpose of this study was to investigate the change of lumbar extensor strength according to lumbosacral angle on chronic lumbar back pain patients. For this investigation lumbar extensor strength was administered to 60 patients who were diagnosed chronic lumbar back pain The subjects was to investigate lumbosacral angle in standing position and it were calculated lumbar extensor strength by using Medex. The result of this study summarized are as follows ; 1. Total experimental group exhibited significantly higher difference than control group in lumbar extensor strength among all degree lumbosacral angle. 2. In the relationship between experimental group and control group in lumbar extensor strength among lumbosacral angle, all degree difference was revealed II, I, III order. 3. In the relationship between experimental group and control group in lumbar extensor strength among lumbosacral angle, I group difference was did not. 4. In the relationship between experimental group and control group in lumbar extensor strength among lumbosacral angle, all degree among II group was noted significantly difference except 24, 72 angle. 5. In the relationship between experimental group and control group in lumbar extensor strength among lumbosacral angle, control group was revealed higher muscle strength 48, 60, 72 angle, however no significantly difference was noted 0, 12, 24 angle. The study was objected difference of other group in both of experimental and control group. Because lumbar extensor weakness with bad position was gradually increased back pain, to Maintain normal lumbosacral angle befor exercising lumbar extensor strength was most important.

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