• 제목/요약/키워드: agreement statistics

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사상체질 진단요소들 간의 일치도 분석연구 (The research on agreement statistics analysis between factors of diagnosis)

  • 장은수;김호석;이시우;김종열
    • 한국한의학연구원논문집
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    • 제12권2호통권17호
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    • pp.103-113
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    • 2006
  • Objectives we intended to know how much did it relate with the results between the instruments of diagnosis by using methods of three factors - QSCCII, PSSC(Phonetic System for Sasang Constitution)-2004, and body measurement which are usually used in diagnosing the Sasang Constitution in clinics Methods We diagnosed Sasang constitution through QSCCII, PSSC(Phonetic System for Sasang Constitution)-2004, Body measurement as a dignosis factors and we used Kappa coefficient to estimate simularity between diagnosis factors, and SPSS 12.0K to analyze data Results and conchusions 1. The orders of agreement statistics are different in the currency of Sasang Constitution diagnosis, Soeum-in was highest and Taeum-in lowest in the the fricency of Sasang Conctitution Diagnosis in the QSCCII, Soeum-in was highest Soyang-in lowest in the PSSC and Taeum-in highest, Soyang-in lowest in the body measurement so, we analogized incorrection in Sasang Constitution Diagnosis 2. Among 443 subjects, 156 (35.3%) had same dignosis in three Sasang Constitution factors. It means agreement statistics among factors of diagnosis are very low, so it is absolutely nessessary to research connection among those, especially Soyang-in part 3. Totally, it is not robust to apply these factors on Sasang Constitution diagnosis, especially agreement statistics between two kinds of Sasang Constitution diagnosis as $0.358{\sim}0.380$. However, we can have a possibility the more we use Sasang Constitution dignosis factors, the higher the agreement statistics is, through the ascending of agreement statistics as $0.526{\sim}0.592$, among three kinds of Sasang Constitution diagnosis To evaluate accuracy of Sasang Constitution diagnosis, it is nessessary to collect data from the subjects who are dignosed through the evidences such as herb medicine, disease and normal symption observation, etc. Using these data, we have to evaluate correction of seperated Sasang Constitution diagnosis methods and to connect those.

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A Study on Comparison of Generalized Kappa Statistics in Agreement Analysis

  • Kim, Min-Seon;Song, Ki-Jun;Nam, Chung-Mo;Jung, In-Kyung
    • 응용통계연구
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    • 제25권5호
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    • pp.719-731
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    • 2012
  • Agreement analysis is conducted to assess reliability among rating results performed repeatedly on the same subjects by one or more raters. The kappa statistic is commonly used when rating scales are categorical. The simple and weighted kappa statistics are used to measure the degree of agreement between two raters, and the generalized kappa statistics to measure the degree of agreement among more than two raters. In this paper, we compare the performance of four different generalized kappa statistics proposed by Fleiss (1971), Conger (1980), Randolph (2005), and Gwet (2008a). We also examine how sensitive each of four generalized kappa statistics can be to the marginal probability distribution as to whether marginal balancedness and/or homogeneity hold or not. The performance of the four methods is compared in terms of the relative bias and coverage rate through simulation studies in various scenarios with different numbers of raters, subjects, and categories. A real data example is also presented to illustrate the four methods.

Q-Q 플롯에 의한 Agreement의 통계적 분석 (Statistical Analysis of Agreement by Q-Q plot)

  • 이제영;이성원;이재우
    • Journal of the Korean Data and Information Science Society
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    • 제9권1호
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    • pp.11-18
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    • 1998
  • 의학에서 새로운 치유방법으로 예전의 방법을 대신하여 교체 사용할 수 있는가 하는 물음에 대하여, 기존에는 상관계수(r)를 이용하여 결정하였으나 최근에는 Bland와 Altman식의 Agreement를 이용하여 결정한다. 본 논문에서는 이들이 표현되는 특성을 Q-Q플롯을 이용하여 살펴보고 이것을 Bland와 Altman식의 방법을 응용하여 그래프를 통한 Agreement에 대하여 분석을 하고자 한다.

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Comparing More than Two Agreement Measures Using Marginal Association

  • Oh, Myong-Sik
    • Communications for Statistical Applications and Methods
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    • 제16권6호
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    • pp.1023-1029
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    • 2009
  • Oh (2009) has proposed a likelihood ratio test for comparing two agreements for dependent observations based on the concept of marginal homogeneity and marginal stochastic ordering. In this paper we consider the comparison of more than two agreement measures. Simple ordering and simple tree ordering among agreement measures are investigated. Some test procedures, including likelihood ratio test, are discussed.

퍼지자료에 대한 분산성분 추정 (Estimation variance components for fuzzy data)

  • Kang, Man-Ki;Park, Gyu-Tag
    • 한국지능시스템학회:학술대회논문집
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    • 한국퍼지및지능시스템학회 2002년도 춘계학술대회 및 임시총회
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    • pp.281-285
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    • 2002
  • The observation fuzzy data in random effect and balanced designs for one way classification by using a the matrix formulation, we can estimate the fuzzy variance components for the ozone depletion example and test by the agreement index.

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Multivariate Analysis of Variance for Fuzzy Data

  • Kang, Man-Ki;Han, Sung-Il
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제4권1호
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    • pp.97-100
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    • 2004
  • We propose some properties of fuzzy multivariate analysis of variance by fuzzy vector operation with agreement index. We deals fuzzy null hypotheses and fuzzy alternative hypothesis and define the agreement index for the grades of the judgements that the hypothesis is rejection or acceptance. Finally, we provide an example to evaluate the judgements.

Intra- and interobserver agreement of computed tomography in assessment of the mandibular condyle

  • Cho, Bong-Hae;Jung, Yun-Hoa
    • Imaging Science in Dentistry
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    • 제37권4호
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    • pp.191-195
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    • 2007
  • Purpose: To study the intra- and interobserver agreement of multidetector row computed tomography (MDCT) in interpretation of degenerative changes of the mandibular condyle. Materials and Methods: Five observers independently evaluated one hundred temporomandibular joint MDCT images for signs of osteophytes, erosion, sclerosis and flattening. The intra- and interobserver agreements were calculated by using Kappa statistics. Results: The intraobserver agreement was substantial for erosion (k=0.75), flattening (k=0.74) and sclerosis (k=0.72) and almost perfect for osteophytes (k=0.84). The interobserver agreement was fair for flattening (k=0.39), moderate for erosion (k=0.58) and sclerosis (k=0.48) and substantial for osteophytes (k=0.75). Conclusion: This study shows that we can expect good agreement for the presence of osteophytes, but not for flattening in the interpretation of MDCT images of the condyle.

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외상환자의 병원 전 및 병원단계 중증도 평가의 일치도 (Measure of Agreement between Prehospital EMS Personnel and Hospital Staffs using Guidelines for Field Triage of Injured Patients)

  • 김대곤;홍기정;노현;홍원표;김유진;신상도;박주옥
    • Journal of Trauma and Injury
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    • 제27권4호
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    • pp.126-132
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    • 2014
  • Purpose: The field trauma triage for injured patients is essential for trauma care system. In this study, agreement of patient evaluation between by prehospital EMS personnel and by hospital staffs and the appropriateness of prehospital triage were evaluated. Methods: This observational study was conducted from September to October 2012 for 5 weeks. During this period, EMT evaluated patient's severity according to guideline for field triage and recorded. Same guideline was applied in 26 hospitals for patients with EMS use. Kappa statistics were used to measure agreement for each item of guideline. Finally, over-triage and under-triage rate of EMT were calculated. Results: During study period, total 3,106 patients were transferred to 26 hospital emergency departments with EMS use. Kappa statistics for "vital signs" items were 0.45 for mentality lower than V and 0.44 for systolic blood pressure lower than 90 mmHg as a moderate agreement. In "anatomy of injury" items Kappa statistics were very low. In "mechanism of injury" items Kappa statistics were 0.28 for high-rise fall down and 0.27 for high energy traffic accident but in other items Kappa statistics were very low. 362 patients (12.0%) were over-triaged and 281 patients (9.3%) were under-triaged. Conclusion: Field triage can be applied but need to evaluate and modify in order to become accurate and sensitive for decision of transportation.

COHEN의 합치도의 두 가지 역설을 해결하기 위한 새로운 합치도의 제안 (A New Measure of Agreement to Resolve the Two Paradoxes of Cohen's Kappa)

  • 박미희;박용규
    • 응용통계연구
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    • 제20권1호
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    • pp.117-132
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    • 2007
  • 두 평정자가 있는 이차원 분류표에서 우연에 의한 합치 비율을 보정한 Cohen의 합치도($\kappa$)는 문제점이 있는 측도로 알려져 있다. $\kappa$는 평정자의 분류 비율(주변확률)에 매우 민감하고, 합치도로서의 조건도 만족하지 못한다. 그러나 $\kappa$를 비롯한 기존 합치도들은 주변확률이 0.5에 가까울 때 안정되며 비슷한 값을 갖는다. 본 연구에서는 이차원 분류표의 불균형적 주변분포를 보정함으로써 $\kappa$의 역설을 해결하는 새로운 합치도 H를 제안한다. 또한 예제를 통해 기존의 합치도들과 제안된 합치도를 비교한다.

항공자유화 협정이 한 중 시장에 미친 영향에 관한 실증 연구 (On the effect of Open Sky agreement on Korea-China air transport market)

  • 정현숙;김인주;이진
    • 한국항공운항학회지
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    • 제22권1호
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    • pp.136-144
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    • 2014
  • This paper studied what kind of effects were made through Open Sky agreement on Korea-China air transport market. To analyze the effects on air transport markets brought by liberalization, this paper studied transport volume, number of airlines, passenger and cargo and routes from 2000 to 2012 Korea-China aviation statistics. Liberalization of shandong and Hainan Provinces agreed in 2006 caused significant differences in frequencies, transport volume, and the number of routes for both passenger and cargo services between 2007 and 2008, as well as statistically significant effects. The analysis on the effect of Korea-China Open skies Agreement between 2000 and 2012 was no difference because the global financial crisis in September 2008.