• 제목/요약/키워드: Multivariate Assessment

검색결과 235건 처리시간 0.028초

거제한산만에 서식하는 대형저서동물의 춘계와 하계의 군집구조 및 건강도 평가 (Community Structure and Health Assessment of Macrobenthic Assemblages at Spring and Summer in Geoje-Hansan Bay, Southern Coast of Korea)

  • 정래홍;서인수;최병미;최민규;윤상필;박상률;나종헌;윤재성
    • 해양환경안전학회지
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    • 제22권1호
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    • pp.27-41
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    • 2016
  • 본 연구는 거제한산만에 서식하는 대형저서동물의 군집구조와 건강도를 평가하는데 목적이 있다. 대형저서동물의 채집을 위한 현장조사는 2013년 5월(이하 춘계)과 8월(이하 하계)에 실시하였다. 거제한산만에서는 총 300종 $7.6m^{-2}$과 75,760개체(1,994개체 $m^{-2}$)의 대형저서동물이 출현하였고, 다모류가 110종과 49,955개체(1,315개체 $m^{-2}$)의 밀도를 나타내 가장 우점하는 생물이었다. 거제한산만의 주요 우점종은 다모류의 긴자락송곳갯지렁이(Lumbrineris longifolia, $299{\pm}164$개체 $m^{-2}$), Aphelochaeta monilaris($100{\pm}57$개체 $m^{-2}$), 이매패류의 종밋(Musculista senhousia, $91{\pm}96$개체 $m^{-2}$) 및 다모류의 꼬리대나무갯지렁이(Praxillella affinis, $80{\pm}696$개체 $m^{-2}$)등이었다. 출현 종과 개체수의 자료를 근거로 대형저서동물의 군집구조를 파악한 결과, 대형저서동물 군집은 크게 내만역(산달도 인근 양식어장) 정점군과 수로역(한산도에서 추봉도 해역) 정점군으로 대별되었다. 거제한산만의 건강도를 평가한 결과, 수로역의 정점군과 비교해 내만역에 위치한 산달도 인근 양식어장 정점군에서 환경질이 상대적으로 불량하였다. 또한 3개의 생물 평가지수(다양도 지수, M-AMBI 지수 및 환경보전도 지수)는 AMBI 지수와 비교해 상대적으로 효율적인 지수임을 알 수 있었다.

폐렴 입원환자 진료과정의 질적 수준과 이에 영향을 미치는 요인: 임상질지표를 중심으로 (Quality and Affecting Factor of Care for Patients Hospitalized with Pneumonia)

  • 문상준;이진석;김윤;유선주;최윤경;서수경;김용익
    • Tuberculosis and Respiratory Diseases
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    • 제66권4호
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    • pp.300-308
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    • 2009
  • 연구배경: 감염성 질환 중 가장 흔한 질환인 폐렴의 질병부담을 줄이기 위해서 폐렴환자의 진료 과정 개선과 이에 영향을 미치는 요인에 대한 분석이 필요하다. 본 연구에서는 국내 폐렴환자의 진료 과정의 질적 수준을 평가하고, 질적 수준에 영향을 미치는 환자 및 병원 요인을 분석하고자 한다. 방 법: 500병상 이상 병원 21곳의 1989년 12월 31일이전 출생 입원 환자로 청구코드 주진단 기준 폐렴인 환자중 2006년 8월부터 10월 사이 퇴원 환자 중 무작위 표본추출 방식으로 1,001건을 표본으로 추출하였다. 환자 및 병원 요인과 과정 지표의 상관관계를 다중 로지스틱 회귀분석을 통하여 분석하였다. 결 과: 병원 도착 후 24시간 이내 혈중산소포화도 검사 시행률은 69.4%, 24시간 이내 혈액배양검사 시행률은 79.1%, 8시간 이내 항생제 투여율은 82.5%, 항생제 투약전 배양검사 시행률은 60.5%로 대부분의 지표가 높은 충족도를 보였다. 환자 요인 중에서는 연령이 24시간 이내혈중산소포화도 검사 시행률에 영향을 미쳤고, 병원 요인 중에는 병상수, 병상당 간호사수, 연간 응급실 내원자수, 병상가동률, 지역, 입원 시각 및 경로 등이 과정 지표 시행률에 영향을 미쳤다. 결 론: 본 연구에서 드러난 진료 과정상의 질적 수준이 취약한 부분에 대하여 질 개선 활동의 역량을 강화하여 보완할 필요가 있다. 또한, 과정 지표들의 병원 간 변이를 줄이기 위하여 지표 시행률이 낮은 의료기관에서는 진료프로토콜 개선 등의 활동을 통하여 진료 과정을 개선해 나가는 노력이 필요하다.

고등학생의 건강 및 삶의 질에 대한 진단적 연구 - PRECEDE 모형을 근간으로 - (A Diagnostic Study on High School Students' Health and Quality of Life - Based on the PRECEDE model -)

  • 유재순;홍여신
    • 한국간호교육학회지
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    • 제3권
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    • pp.78-98
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    • 1997
  • Health education, as the most fundamental concept for national health promotion, alms for developing the self-care ability of the general public. High school days are regarded as the period when most important physical, mental and social developments occur, and most health-related behaviors are formed. School health education is one of the major learning resources influencing health potential in the home and community as well as for the individual student. High school health education in Korea has a fundamental systemic flaw in that health-related subjects are divided and taught under various subjects areas at school. In order to achieve the goal of school health education, it is essential to make a systematic assessment of the learner's concerns connected with his health and life, and the factors affecting them. So far, most of the research projects that had been carried out for improving high school health education were limited in their concerns to a particular aspect of health. Even though some had been done in view of comprehensive school health education, they failed to Include a health assessment of the learner. Therefore, in this study the high school students' concerns related to health and life were investigated in the first place on the basis of the PRECEDE model, developed by Green and others for the purpose of a comprehensive diagnostic research on high school health education. This study was done in two steps : one was the basic study for developing research instrument and the other was the main one. The former was conducted at five high schools in Seoul and Cheongju for 2 months-beginning in March, 1996. The students were asked to respond to questions related to their health and lives in unstructured open-ended question forms. On the basis of analysis of the basic study, the diagnostic instruments for the quality of life, health problems, health behavior and educational factors were constructed to be used for the collection of data for main study. An expert panel and the pilot study were used to improve content validity and reliability of the instruments. The reliability of the instruments was measured at between .7697 and .9611 by the Cronbach $\alpha$. The data for this study were collected from the sample consisted of the junior and senior classes of twenty general and vocational high schools in Seoul and Cheongju for two months period beginning in July, 1996. In analyzing the data, both t-test and $X^2$-test were done by using SAS-$PC^+$ Program to compare data between the sexes of the high school students and the types of high school. A canonical correlation analysis was carried out to determine the relationships among the diagnostic variables, and a multivariate multiple regression analysis was conducted by using LISREL 8.03 to ascertain the influences of variables on the high school students' health and quality of life. The results were as follows : 1) The findings of the hypothesis tests (1) The canonical correlation between the educational diagnosis variables and behavioral, epidemiological, social diagnosis variables was .7221, which was significant at the level of p<.001. (2) The canonical correlation between the educational diagnosis variables and the behavior variables was .6851, which also was significant (p<.001). (3) The canonical correlation between the behavioral diagnosis variables and the epidemiological variables was 4295, which was significant (p<.001). (4) The canonical correlation between the epidemiological diagnosis variables and the social variables was .6005, which was also significant (p<.001). Therefore, the relationship between each diagnosis variable suggested by the PRECEDE model had been experimentally proven to be valid, supporting the conceptual framework of the study as appropriate for assessing the multi-dimensional factors affecting high school students' health and quality of life. Health behavior self-efficacy, the level of parents' interest and knowledge of health, and the level of the perception of school health education, all of which are the educational diagnostic variables, are the most influential variables in students' health and quality of life. In particular, health behavior self-efficacy, a causative factor, was one of the main influential variables in their health and quality of life. Other diagnostic variables suggested in the steps of the PRECEDE model were found to have reciprocal relations rather than a unidirectional causative relationship. The significance of this research is that it has diagnosed the needs of high school health education by the learner-centered assessment of variety of factors related to the health and the life of the students. This research findings suggest an integrated system of school health education to be contrived to enhance the effectiveness of the education by strengthening the influential factors such as self-efficacy to improve the health and quality of the lives of high school students.

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수변식생지수를 이용한 금강본류와 미호천의 건강성 평가 및 식생분석 (Health Condition Assessment Using the Riparian Vegetation Index and Vegetation Analysis of Geumgang mainstream and Mihocheon)

  • 이승연;장래하;한영섭;정영호;이수인;이응필;유영한
    • 한국환경생태학회지
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    • 제32권1호
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    • pp.105-117
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    • 2018
  • 금강의 하천관리의 실질적인 자료를 얻고자 본류와 미호천의 30지소에서 수변식생지수를 이용하여 건강성평가와 다변량식생분석을 하였다. 그 결과 금강본류와 미호천에서 출현한 식물군락은 54개이었고, 식물상은 75과 185속 243종 2아종 21변종 2품종 268분류군이었다. 수변식생지수는 평균 38.3(3.3;G-D1 ~ 66.7;G-U2, G-U4, G-M3)으로 이 지역의 하천의 건강성은 보통(C등급)으로 평가되었다. 하천의 건강성은 금강본류의 상류가 가장 높았고, 금강본류의 하류에서 가장 낮았다. 수변식생지수와 수질의 클로로필-a의 함량과의 관계는 관련성이 낮게 나타났다. 집락분석결과, 식생은 바랭이군락 그룹, 갯버들군락 그룹, 개망초군락 그룹, 환삼덩굴, 버드나무, 물억새 그리고 달뿌리풀 군락이 우점하는 그룹, 망초와 물피 군락이 우점하는 그룹 등의 5개 집단으로 나누어졌고, 지소들은 비슷한 건강상태를 갖는 것들끼리 가까이 나타났다. CCA분석결과, 식생의 분포에 영향을 주는 환경요인은 식생면적, 인공구조물 면적, 수로면적, 지점폭, 수로폭, 제방높이 등의 물리적인 조건과 생물학적 요인의 출현종수였다. 이상과 같이 하천의 건강성이 높은 지역은 모니터링을 통하여 하천 식생의 지속적인 유지관리가 필요하고 건강성이 낮은 지역은 생태복원과 같은 적극적인 시행이 필요하다고 판단된다.

금강유역의 토지이용 변화가 수문·수질 건전성에 미치는 영향 평가 (Evaluation of Land Use Change Impact on Hydrology and Water Quality Health in Geum River Basin)

  • 이지완;박종윤;정충길;김성준
    • 한국지리정보학회지
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    • 제22권2호
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    • pp.82-96
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    • 2019
  • 본 연구는 금강유역을 대상으로 SWAT(Soil and Water Assessment Tool)을 이용하여 유역 수문 및 수질에 대한 유역건전성 (Watershed Healthiness)을 평가하였다. 유역 수문과 수질에 대한 건전성은 다변수 정규분포를 이용하여 0(불량)에서 1(양호)의 범위로 산정하였다. 유역 건전성 평가에 앞서, SWAT 수문 검보정 결과 5개 지점에 대한 11년(2005~2015) 동안의 하천유출량의 Nash-Sutcliffe 모델효율(NSE)은 0.50~0.77이었고, 3개 지점에 대한 suspended solid(SS), total nitrogen(T-N), and total phosphorus(T-P)의 결정계수($R^2$)는 각각 0.67~0.94, 0.59~0.79, 0.61~0.79이었다. 총 24년(1985~2008)에 대한 토지이용변화에 따른 유역 건전성 분석을 위하여 1985년, 1990년, 1995년 2000년, 2008년 5개의 토지이용자료를 준비하였다. 기준년도인 1985년 대비 2008년 SWAT 총유출은 불투수면적의 증가로 40.6% 증가하였고, 토양수분과 기저유출은 각각 6.8%, 3.0 % 감소하였으며, SS, T-N, T-P는 특히 농업활동으로 인해 각각 29.2%, 9.3%, 16.7% 증가하였다. 1985년 토지이용조건 대비 2008년의 유역 수문과 수질의 건전성은 각각 1에서 0.94와 0.69로 감소하였다. 본 연구의 결과는 과거 자연상태 대비 인간활동에 의한 유역 환경변화를 감지할 수 있을 것으로 판단된다.

열공성 뇌경색 환자-대조군에서 신경행동검사의 수행 평가 (A Neurobehavioral Performance Assessment in Lacunar Infarction Case-control Study)

  • 김함겸;박수경;이건세;김형수;김화선;장성훈
    • Journal of Preventive Medicine and Public Health
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    • 제36권3호
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    • pp.255-262
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    • 2003
  • 전체 뇌졸중의 $15{\sim}20%$를 차지하고 있는 열공성 뇌경색(lacunar infarction)은 최근 뇌경색형 뇌졸중의 증가와 더불어 그 중요성이 점차 증가하고 있는데, 1년 이내 뇌경색이 재발되거나 노인, 고혈압 및 초기 신경학적 이상과 같은 감수성 인자가 있는 경우 뇌경색 재발과 혈관성 치매 발생 위험이 있어 삼차예방적 측면에서의 적절한 처치가 필요한 질병이다. 그렇지만 열공성 뇌경색은 증상이 없거나 경미한 경우가 상당히 많아 환자 자신이 치료의 중요성을 느끼지 못할 뿐 아니라 의사들도 환자의 경미한 신경학적 이상을 인지하지 못하여 처치의 당위성에 대해 설득력있는 근거를 제시할 수 없어 적절한 처치가 미비한 상황이다. 본 연구는 신경학적 자각 증상은 없지만 MRI상 열공성 뇌경색으로만 진단된 환자군이 MRI상 이상소견이 관찰되지 않는 대조군에 비하여 신경행동 검사상 차이가 관찰될 것이라는 가설을 구명하고자 하였다. 따라서 뇌졸중의 증상 및 증후 없이 두개골 외상 혹은 두통, 경부강직 등과 같은 신경학적 이상으로 MRI를 촬영한 대상자 중에서 다른 이상 없이 열공성 뇌경색으로만 진단될 환자군과 특별한 이상 소견이 없는 것으로 진단된 대조군에서 WHO의 NCTB(neurobehavioral core test battery)검사의 일부와 Perdue pegboard score검사를 시행하였고, 그 결과 대조군에 비해 환자군의 신경행동 이상이 평균 및 가장 빠른 단순반응시간 검사를 제외한 5개 검사에서 관찰되었다. 본 검사의 결과는 자각 증상이 없거나 경미한 증상을 호소하는 열공성 뇌경색 환자들의 차후 필요한 검사의 선별과 삼차 예방적 측면에서 처치의 근거로서 활용될 수 있을 것이다. 또한 자각 증상이 없거나 경미한 증상이 있지만 진찰상 신경학적 이상 증후를 거의 찾을 수 없는 대상자에서 MRI검사 필요성의 근거를 확인하고자 하는 대상자에게 이용될 수 있을 것으로 사료된다.

가와사끼병에서 정맥용 면역글로불린 치료 반응 예측의 한계 (Limitation of Prediction on Intravenous Immunoglobulin Responsiveness in Kawasaki Disease)

  • 김성구;한지윤;임정우;오진희;한지환;이경일;강진한;이준성
    • Pediatric Infection and Vaccine
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    • 제17권2호
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    • pp.169-176
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    • 2010
  • 목적 : 가와사끼병 환자들에서 정맥용 면역글로불린(intravenous immunoglobulin, IVIG) 불응군의 예측 지표를 두 대조군을 사용하여 연구하였다. 방 법 : 가톨릭대학교 대전성모병원에서 IVIG 2 g/kg로 치료한 229명의 가와사끼병 환자들을 대상으로 하였다. 23명 IVIG 불응군(IVIG 투여 후에도 24시간 이상 발열이 지속)과, 첫번째 206명의 IVIG 반응군 및 두번째 연령과 치료 전 발열일을 일치시킨 46명의 대조군에 대해 임상적, 검사실 소견을 비교하였다. 결과 : 인구학적, 임상적 소견은 IVIG 불응군과 반응군이 유사하였다. 검사실 소견에서, 두 가지 연구 모두에서 IVIG 불응군은 반응군에 비해서 중성구 분획, CRP, AST, ALT 그리고, LDH는 유의하게 상승되었고, 림프구 분획, 총 단백질, 알부민, 혈소판 수, 그리고 총 콜레스테롤은 유의하게 저하되어 있었다(단변수분석). 그러나, 다변수분석에서 첫번째 연구에서 높은 중성구 분획(cutoff value, >77%, 민감도 68.4%, 특이도 79.5%)과 낮은 총 콜레스테롤(<124 mg/dL, 민감도 79%, 특이도 70.5%)이, 두번째 연구에서는 알부민(<3.6 g/dL, 민감도 73.7%, 특이도 60%)만이 불응군의 예측 지표로 나타났다. 결론 : 가와사끼병에서 염증의 중증도는 발병 시에 상승되거나 저하된 검사실 소견에 반영된다. 이러한 검사실 지표에 대한 다변수분석은 환아수, 연령 및 발열 기간 등의 인자에 의해서 영향을 받으므로, 관상동맥병변의 위험이 큰 가와사끼병 환자들을 찾기 위한 다른 접근 방법이 필요하다.

국내 MIS 연구에서 구조방정식모형 활용에 관한 메타분석 (A Meta Analysis of Using Structural Equation Model on the Korean MIS Research)

  • 김종기;전진환
    • Asia pacific journal of information systems
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    • 제19권4호
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    • pp.47-75
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    • 2009
  • Recently, researches on Management Information Systems (MIS) have laid out theoretical foundation and academic paradigms by introducing diverse theories, themes, and methodologies. Especially, academic paradigms of MIS encourage a user-friendly approach by developing the technologies from the users' perspectives, which reflects the existence of strong causal relationships between information systems and user's behavior. As in other areas in social science the use of structural equation modeling (SEM) has rapidly increased in recent years especially in the MIS area. The SEM technique is important because it provides powerful ways to address key IS research problems. It also has a unique ability to simultaneously examine a series of casual relationships while analyzing multiple independent and dependent variables all at the same time. In spite of providing many benefits to the MIS researchers, there are some potential pitfalls with the analytical technique. The research objective of this study is to provide some guidelines for an appropriate use of SEM based on the assessment of current practice of using SEM in the MIS research. This study focuses on several statistical issues related to the use of SEM in the MIS research. Selected articles are assessed in three parts through the meta analysis. The first part is related to the initial specification of theoretical model of interest. The second is about data screening prior to model estimation and testing. And the last part concerns estimation and testing of theoretical models based on empirical data. This study reviewed the use of SEM in 164 empirical research articles published in four major MIS journals in Korea (APJIS, ISR, JIS and JITAM) from 1991 to 2007. APJIS, ISR, JIS and JITAM accounted for 73, 17, 58, and 16 of the total number of applications, respectively. The number of published applications has been increased over time. LISREL was the most frequently used SEM software among MIS researchers (97 studies (59.15%)), followed by AMOS (45 studies (27.44%)). In the first part, regarding issues related to the initial specification of theoretical model of interest, all of the studies have used cross-sectional data. The studies that use cross-sectional data may be able to better explain their structural model as a set of relationships. Most of SEM studies, meanwhile, have employed. confirmatory-type analysis (146 articles (89%)). For the model specification issue about model formulation, 159 (96.9%) of the studies were the full structural equation model. For only 5 researches, SEM was used for the measurement model with a set of observed variables. The average sample size for all models was 365.41, with some models retaining a sample as small as 50 and as large as 500. The second part of the issue is related to data screening prior to model estimation and testing. Data screening is important for researchers particularly in defining how they deal with missing values. Overall, discussion of data screening was reported in 118 (71.95%) of the studies while there was no study discussing evidence of multivariate normality for the models. On the third part, issues related to the estimation and testing of theoretical models on empirical data, assessing model fit is one of most important issues because it provides adequate statistical power for research models. There were multiple fit indices used in the SEM applications. The test was reported in the most of studies (146 (89%)), whereas normed-test was reported less frequently (65 studies (39.64%)). It is important that normed- of 3 or lower is required for adequate model fit. The most popular model fit indices were GFI (109 (66.46%)), AGFI (84 (51.22%)), NFI (44 (47.56%)), RMR (42 (25.61%)), CFI (59 (35.98%)), RMSEA (62 (37.80)), and NNFI (48 (29.27%)). Regarding the test of construct validity, convergent validity has been examined in 109 studies (66.46%) and discriminant validity in 98 (59.76%). 81 studies (49.39%) have reported the average variance extracted (AVE). However, there was little discussion of direct (47 (28.66%)), indirect, and total effect in the SEM models. Based on these findings, we suggest general guidelines for the use of SEM and propose some recommendations on concerning issues of latent variables models, raw data, sample size, data screening, reporting parameter estimated, model fit statistics, multivariate normality, confirmatory factor analysis, reliabilities and the decomposition of effects.

Factors Determining the Timing of Tracheostomy in Medical ICU of a Tertiary Referral Hospital

  • Park, Young-Sik;Lee, Jin-Woo;Lee, Sang-Min;Yim, Jae-Joon;Kim, Young-Whan;Han, Sung-Koo;Yoo, Chul-Gyu
    • Tuberculosis and Respiratory Diseases
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    • 제72권6호
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    • pp.481-485
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    • 2012
  • Background: Tracheostomy is a common procedure for patients requiring prolonged mechanical ventilation. However, the timing of tracheostomy is quite variable. This study was performed to find out the factors determining the timing of tracheostomy in medical intensive care unit (ICU). Methods: Patients who were underwent tracheostomy between January 2008 and December 2009 in the medical ICU of Seoul National University Hospital were included in this retrospective study. Results: Among the 59 patients, 36 (61.0%) were male. Median Acute Physiology And Chronic Health Evaluation (APACHE) II scores and Sequential Organ Failure Assessment scores on the admission day were 28 and 7, respectively. The decision of tracheostomy was made on 13 days, and tracheostomy was performed on 15 days after endotracheal intubation. Of the 59 patients, 21 patients received tracheostomy before 2 weeks (group I) and 38 were underwent after 2 weeks (group II). In univariate analysis, days until the decision to perform tracheostomy (8 vs. 14.5, p<0.001), days before tracheostomy (10 vs. 18, p<0.001), time delay for tracheostomy (2.1 vs. 3.0, p<0.001), cardiopulmonary resuscitation (19.0% vs. 2.6%, p=0.049), existence of neurologic problem (38.1% vs. 7.9%, p=0.042), APACHE II scores (24 vs. 30, p=0.002), and $PaO_2/FiO_2$ <300 mm Hg (61.9% vs. 91.1%, p=0.011) were different between the two groups. In multivariate analysis, APACHE II scores${\geq}20$ (odds ratio [OR], 12.44; 95% confidence interval [CI], 1.14~136.19; p=0.039) and time delay for tracheostomy (OR, 1.97; 95% CI, 1.11~3.55; p=0.020) were significantly associated with tracheostomy after 2 weeks. Conclusion: APACHE II scores${\geq}20$ and time delay for tracheostomy were associated with tracheostomy after 2 weeks.

Relationships between Genetic Diversity and Fusarium Toxin Profiles of Winter Wheat Cultivars

  • Goral, Tomasz;Stuper-Szablewska, Kinga;Busko, Maciej;Boczkowska, Maja;Walentyn-Goral, Dorota;Wisniewska, Halina;Perkowski, Juliusz
    • The Plant Pathology Journal
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    • 제31권3호
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    • pp.226-244
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    • 2015
  • Fusarium head blight is one of the most important and most common diseases of winter wheat. In order to better understanding this disease and to assess the correlations between different factors, 30 cultivars of this cereal were evaluated in a two-year period. Fusarium head blight resistance was evaluated and the concentration of trichothecene mycotoxins was analysed. Grain samples originated from plants inoculated with Fusarium culmorum and naturally infected with Fusarium species. The genetic distance between the tested cultivars was determined and data were analysed using multivariate data analysis methods. Genetic dissimilarity of wheat cultivars ranged between 0.06 and 0.78. They were grouped into three distinct groups after cluster analysis of genetic distance. Wheat cultivars differed in resistance to spike and kernel infection and in resistance to spread of Fusarium within a spike (type II). Only B trichothecenes (deoxynivalenol, 3-acetyldeoxynivalenol and nivalenol) produced by F. culmorum in grain samples from inoculated plots were present. In control samples trichothecenes of groups A (H-2 toxin, T-2 toxin, T-2 tetraol, T-2 triol, scirpentriol, diacetoxyscirpenol) and B were detected. On the basis of Fusarium head blight assessment and analysis of trichothecene concentration in the grain relationships between morphological characters, Fusarium head blight resistance and mycotoxins in grain of wheat cultivars were examined. The results were used to create of matrices of distance between cultivars - for trichothecene concentration in inoculated and naturally infected grain as well as for FHB resistance Correlations between genetic distance versus resistance/mycotoxin profiles were calculated using the Mantel test. A highly significant correlation between genetic distance and mycotoxin distance was found for the samples inoculated with Fusarium culmorum. Significant but weak relationships were found between genetic distance matrix and FHB resistance or trichothecene concentration in naturally infected grain matrices.