Log in

Relevant bibliographies by topics / Coefficient of concordance / Journal articles

To see the other types of publications on this topic, follow the link: Coefficient of concordance.

Journal articles on the topic 'Coefficient of concordance'

Author: Grafiati

Published: 4 June 2021

Last updated: 12 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Coefficient of concordance.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

CASTRO, CAÍQUE JAUHAR DE, LUIS EDUARDO CARELLI TEIXEIRA DA SILVA, LUIZ EDUARDO ALMEIDA, et al. "INTRA- AND INTEROBSERVER ANALYSIS OF PEDICLE SCREW PLACEMENT IN SCOLIOSIS CORRECTION." Coluna/Columna 19, no. 3 (2020): 172–75. http://dx.doi.org/10.1590/s1808-185120201903224255.

Full text

Abstract:

ABSTRACT Objective To establish the statistical interobserver and intraobserver concordance of thoracic pedicle screw placement in scoliosis surgery, with a 4-week interval between the two analyses. Methods Of 55 patients that evaluated the intra- and interobserver concordances of the screw positions (according to the Abul-Kasim classification) using the Kappa coefficient. Results The intraobserver concordance ranged from a Kappa coefficient of 0.516 to 0.889 (“moderate” to “almost perfect”) between the two analyses performed four weeks apart. Interobserver concordance ranged from 0.379 to 0.633 (“reasonable” to “strong”). Conclusion The intraobserver concordance was always greater than the interobserver concordance. No concordance coefficient was classified as “insignificant” or “weak”. Level of Evidence III; Retrospective study.

APA, Harvard, Vancouver, ISO, and other styles

2

Liao, Jason J. Z. "An improved concordance correlation coefficient." Pharmaceutical Statistics 2, no. 4 (2003): 253–61. http://dx.doi.org/10.1002/pst.52.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

张, 天芳. "Understanding of Kendall’s Coefficient of Concordance." Statistics and Application 09, no. 04 (2020): 578–81. http://dx.doi.org/10.12677/sa.2020.94061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

King, Tonya S., Vernon M. Chinchilli, and Josep L. Carrasco. "A repeated measures concordance correlation coefficient." Statistics in Medicine 26, no. 16 (2007): 3095–113. http://dx.doi.org/10.1002/sim.2778.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Cabała, Paweł. "Zastosowanie współczynnika konkordancji w pomiarze zgodności ocen ekspertów." Przegląd Statystyczny. Statistical Review 2010, no. 2-3 (2010): 36–52. http://dx.doi.org/10.59139/ps.2010.02-03.3.

Full text

Abstract:

In this article the problem of the measurement of agreement among experts is discussed. There are several tools to verify whether opinions expressed by an ordinal scale are reliable. If the objects are ranked, one of correlation coefficients is chosen. At the beginning, the case of m > 2 experts ranking n objects is presented; first, using untied ranks and second, tied ranks. To this end Kendall’s coefficient of concordance is applied. The method of examination of the statistical significance is also presented. Additionally the issue of the interpretation of the concordance coefficient in reference to the average of Spearman’s r coefficients is raised. The paper provides an example of using concordance coefficient when ranks are tied and discusses limitations of using rank correlation methods as a tool for evaluating the degree of agreement among experts’ opinions.

APA, Harvard, Vancouver, ISO, and other styles

6

Hsieh, Ming-Hong, Po-Chung Ju, Jeng-Yuan Chiou, Yu-Hsun Wang, Jong-Yi Wang, and Cheng-Chen Chang. "Spousal Concordance and Cross-Disorder Concordance of Mental Disorders: A Nationwide Cohort Study." Psychiatry Investigation 19, no. 10 (2022): 788–94. http://dx.doi.org/10.30773/pi.2022.0009.

Full text

Abstract:

Objective Although both partners of a married couple can have mental disorders, the concordant and cross-concordant categories of disorders in couples remain unclear. Using national psychiatric population-based data only from patients with mental disorders, we examined married couples with mental disorders to examine spousal concordance and cross-disorder concordance across the full spectrum of mental disorders.Methods Data from the 1997 to 2012 Taiwan Psychiatric Inpatient Medical Claims data set were used and a total of 662 married couples were obtained. Concordance of mental disorders was determined if both spouses were diagnosed with mental disorder of an identical category in the International Classification of Diseases, Ninth Revision, Clinical Modification; otherwise, cross-concordance was reported.Results According to Cohen’s kappa coefficient, the most concordant mental disorder in couples was substance use disorder, followed by bipolar disorder. Depressive and anxiety disorders were the most common cross-concordant mental disorders, followed by bipolar disorder. The prevalence of the spousal concordance of mental disorders differed by monthly income and the couple’s age disparity.Conclusion Evidence of spousal concordance and cross-concordance for mental disorders may highlight the necessity of understanding the social context of marriage in the etiology of mental illness. Identifying the risk factors from a common environment attributable to mental disorders may enhance public health strategies to prevent and improve chronic mental illness of married couples.

APA, Harvard, Vancouver, ISO, and other styles

7

Verbic, Miroslav, and Franc Kuzmin. "Coefficient of structural concordance and an example of its application: Labour productivity and wages in Slovenia." Panoeconomicus 56, no. 2 (2009): 227–40. http://dx.doi.org/10.2298/pan0902227v.

Full text

Abstract:

The article presents the underlying principles, derivation and properties of a simple descriptive measure of concordance between two analogous rank structures that we call the coefficient of structural concordance. It is based upon the idea of Kendall's coefficient of concordance, which we extend to two rank structures. As the coefficient of structural concordance is a pure intergroup measure of concordance, it is designed to complement the Kendall's intragroup coefficient of concordance. We apply this descriptive measure by exploring the relationship between wages and labour productivity in Slovenia for the period 1998-2007. We are able to confirm the hypothesis of high concordance between wages and labour productivity, which indicates a stimulative role of wages in production of market traded goods and services.

APA, Harvard, Vancouver, ISO, and other styles

8

Lin, Lawrence I.-Kuei. "A Concordance Correlation Coefficient to Evaluate Reproducibility." Biometrics 45, no. 1 (1989): 255. http://dx.doi.org/10.2307/2532051.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Lin, Lawrence I.-Kuei. "Assay Validation Using the Concordance Correlation Coefficient." Biometrics 48, no. 2 (1992): 599. http://dx.doi.org/10.2307/2532314.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

King, Tonya S., and Vernon M. Chinchilli. "ROBUST ESTIMATORS OF THE CONCORDANCE CORRELATION COEFFICIENT." Journal of Biopharmaceutical Statistics 11, no. 3 (2001): 83–105. http://dx.doi.org/10.1081/bip-100107651.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Steichen, Thomas J., and Nicholas J. Cox. "A Note on the Concordance Correlation Coefficient." Stata Journal: Promoting communications on statistics and Stata 2, no. 2 (2002): 183–89. http://dx.doi.org/10.1177/1536867x0200200206.

Full text

Abstract:

Program concord implements L. I. Lin's concordance correlation coefficient (Lin, 1989), as well as the limits-of-agreement procedure (Bland and Altman, 1986). Recently, Lin (2000) issued an erratum reporting a number of typographical errors in his seminal 1989 paper. Further, changes in Stata Version 7 required modification of concord. This note reports the effect of the errors and provides a corrected and updated program.

APA, Harvard, Vancouver, ISO, and other styles

12

Crawford, Sara B., Andrzej S. Kosinski, Hung-Mo Lin, John M. Williamson, and Huiman X. Barnhart. "Computer programs for the concordance correlation coefficient." Computer Methods and Programs in Biomedicine 88, no. 1 (2007): 62–74. http://dx.doi.org/10.1016/j.cmpb.2007.07.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Coolen-Maturi, Tahani. "A new weighted rank coefficient of concordance." Journal of Applied Statistics 41, no. 8 (2014): 1721–45. http://dx.doi.org/10.1080/02664763.2014.889664.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Grzegorzewski, Przemysław. "The coefficient of concordance for vague data." Computational Statistics & Data Analysis 51, no. 1 (2006): 314–22. http://dx.doi.org/10.1016/j.csda.2006.04.027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Carrasco, Josep L., and Lluis Jover. "Concordance correlation coefficient applied to discrete data." Statistics in Medicine 24, no. 24 (2005): 4021–34. http://dx.doi.org/10.1002/sim.2397.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Jumniensuk, Chayanit, Alexander Nobori, Thomas Lee, T. Niroshi Senaratne, Dinesh Rao, and Sheeja Pullarkat. "Concordance of Peripheral Blood and Bone Marrow Next-Generation Sequencing in Hematologic Neoplasms." Advances in Hematology 2022 (March 26, 2022): 1–6. http://dx.doi.org/10.1155/2022/8091746.

Full text

Abstract:

Objective. Mutational analysis by next-generation sequencing (NGS) obtained by peripheral blood NGS has been of clinical interest to use as a minimally invasive screening tool. Our study evaluates the correlation between NGS results on peripheral blood and bone marrow in hematolymphoid disease. Method. We evaluated patients who had NGS for presumed hematologic malignancy performed on peripheral blood and bone marrow within a 1-year interval of each other. We excluded cases in which chemotherapy or bone marrow transplant occurred in the interval between the two tests. The concordance across peripheral blood and bone marrow NGS results was assessed by kappa coefficient analysis. Results. A total of 163 patients were studied. Concordance of peripheral blood and bone marrow NGS found in 150 patients (92.0%) with a kappa coefficient of 0.794 (kappa standard error 0.054) and P value for testing kappa <0.0001. Myeloid neoplasms showed concordant results in 77/78 cases (98.7%) with a kappa coefficient of 0.916. Lymphoid neoplasms showed concordant results in 26/31 cases (83.9%) with a kappa coefficient of 0.599. Nonneoplastic cases showed concordant results in 47/54 cases (87.0%) with a kappa coefficient of 0.743. Conclusion. Peripheral blood NGS is a reliable tool for mutational analysis and provides a less invasive method for screening and monitoring of the molecular profile.

APA, Harvard, Vancouver, ISO, and other styles

17

Лубенец, Ю. В. "ALTERNATIVE COEFFICIENT OF CONCORDANCE IN CASE OF CONNECTED RANKS." ВЕСТНИК ВОРОНЕЖСКОГО ГОСУДАРСТВЕННОГО ТЕХНИЧЕСКОГО УНИВЕРСИТЕТА, no. 1 (April 19, 2021): 40–45. http://dx.doi.org/10.36622/vstu.2021.17.1.005.

Full text

Abstract:

Рассматривается оценка согласованности мнений экспертов при проведении экспертного опроса. Наиболее часто в качестве такой оценки применяется коэффициент конкордации Кендалла. Однако этот коэффициент не может в полной мере применяться для установления хорошей согласованности мнений экспертов, поскольку он показывает только отклонение от случаев полной несогласованности. Для устранения данного недостатка может рассматриваться альтернативный коэффициент конкордации, оценивающий близость сумм рангов альтернатив к случаю полной согласованности. Здесь дается определение этого коэффициента при наличии связанных рангов. Сложность определения заключается в том, что в этом случае наблюдается несколько случаев полной согласованности с различными суммами рангов. Определение альтернативного коэффициента конкордации при наличии связанных рангов проводится в два этапа. Сначала вводится его определение для упорядоченных таблиц специального вида и показывается его совпадение с коэффициентом конкордации Кендалла в этом случае. После дается определение альтернативного коэффициента конкордации в общем случае и показывается более простая формула его вычисления. Далее приводятся некоторые примеры сравнений значений рассматриваемых коэффициентов конкордации, их статистических характеристик и гистограмм The article considers evaluation of expert opinion consistency when conducting an expert survey. The most commonly used score is Kendall's coefficient of concordance. However, this coefficient cannot be fully applied to establish good agreement of expert opinions, as it only shows deviations from cases of complete inconsistency. To eliminate this drawback, an alternative concordance coefficient can be considered, which estimates the proximity of the sums of the ranks of the alternatives to the case of complete consistency. The article gives the definition of this coefficient in the presence of connected ranks. The difficulty of this definition lies in the fact that in this case there are several cases of complete consistency with different sums of ranks. Definition of the alternative coefficient of concordance in the presence of tied ranks is carried out in two stages. First, its definition for ordered tables of a special kind is introduced and its coincidence with Kendall's coefficient of concordance in this case is shown. After that, the definition of the alternative coefficient of concordance in the general case is given and a simpler formula for its calculation is shown. Below are some examples of comparisons of the values of the considered concordance coefficients, their statistical characteristics, and histograms

APA, Harvard, Vancouver, ISO, and other styles

18

Choi, Won Jae, Jin Kyung An, Jeong Joo Woo, and Hee Yong Kwak. "Comparison of Diagnostic Performance in Mammography Assessment: Radiologist with Reference to Clinical Information Versus Standalone Artificial Intelligence Detection." Diagnostics 13, no. 1 (2022): 117. http://dx.doi.org/10.3390/diagnostics13010117.

Full text

Abstract:

We compared diagnostic performances between radiologists with reference to clinical information and standalone artificial intelligence (AI) detection of breast cancer on digital mammography. This study included 392 women (average age: 57.3 ± 12.1 years, range: 30–94 years) diagnosed with malignancy between January 2010 and June 2021 who underwent digital mammography prior to biopsy. Two radiologists assessed mammographic findings based on clinical symptoms and prior mammography. All mammographies were analyzed via AI. Breast cancer detection performance was compared between radiologists and AI based on how the lesion location was concordant between each analysis method (radiologists or AI) and pathological results. Kappa coefficient was used to measure the concordance between radiologists or AI analysis and pathology results. Binominal logistic regression analysis was performed to identify factors influencing the concordance between radiologists’ analysis and pathology results. Overall, the concordance was higher in radiologists’ diagnosis than on AI analysis (kappa coefficient: 0.819 vs. 0.698). Impact of prior mammography (odds ratio (OR): 8.55, p < 0.001), clinical symptom (OR: 5.49, p < 0.001), and fatty breast density (OR: 5.18, p = 0.008) were important factors contributing to the concordance of lesion location between radiologists’ diagnosis and pathology results.

APA, Harvard, Vancouver, ISO, and other styles

19

Lubenets, Yu V. "SOME PROPERTIES OF THE ALTERNATIVE COEFFICIENT OF CONCORDANCE." Vestnik LSTU, no. 2 (2021): 12–17. http://dx.doi.org/10.53015/23049235_2021_2_12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Legendre, Pierre. "Species associations: the Kendall coefficient of concordance revisited." Journal of Agricultural, Biological, and Environmental Statistics 10, no. 2 (2005): 226–45. http://dx.doi.org/10.1198/108571105x46642.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Hiriote, Sasiprapa, and Vernon M. Chinchilli. "Matrix-based Concordance Correlation Coefficient for Repeated Measures." Biometrics 67, no. 3 (2011): 1007–16. http://dx.doi.org/10.1111/j.1541-0420.2010.01549.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Ma, Yan, Wan Tang, Qin Yu, and X. M. Tu. "Modeling Concordance Correlation Coefficient for Longitudinal Study Data." Psychometrika 75, no. 1 (2009): 99–119. http://dx.doi.org/10.1007/s11336-009-9142-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Le Rhun, Emilie, Patrick Devos, Thomas Boulanger, et al. "Validation and revision of the RANO Leptomeningeal Metastasis Group scorecard for response assessment." Journal of Clinical Oncology 37, no. 15_suppl (2019): e13546-e13546. http://dx.doi.org/10.1200/jco.2019.37.15_suppl.e13546.

Full text

Abstract:

e13546 Background: The Response Assessment in Neuro-Oncology (RANO) group has proposed a scorecard to evaluate response assessed by magnetic resonance imaging (MRI) during treatment of leptomeningeal metastasis (LM). Methods: To validate the LM-RANO scorecard, cerebrospinal MRI of 22 patients with LM from solid tumors were rated by 10 neuro-oncologists and 9 neuroradiologists at baseline and during follow-up after treatment. The original scorecard and its instructions were sent to the raters. The inter-observer agreement for the evaluation of single items was assessed using the Krippendorff alpha coefficient. The agreement between numerical parameters including scores at baseline and at follow-up after treatment and total scores was determined using the intraclass coefficient of correlation (ICC). Results: Instructions of the scorecard were not clear for the majority of raters. The alpha concordance coefficients obtained for the rating of single items at baseline and at follow-up were low (Krippendorf alpha coefficient < 0.61 for all raters). The best concordances were noted for spinal nodules (0.60). The worst concordances were obtained for brain linear leptomeningeal enhancement and cranial nerve enhancement. The concordance was better among neuroradiologists than among neuro-oncologists. A poor agreement was also noted when evaluating changes between baseline and follow-up and for total scores (ICC < 0.65 for the best score for all raters). Conclusions: Assessing response of LM by MRI remains challenging. The definition of a measurable lesion and the determination of response were the most important challenges. A central review is therefore recommended for clinical trials in LM. Based on this study we propose a new scorecard that will require a similar assessment as conducted here.

APA, Harvard, Vancouver, ISO, and other styles

24

Barnhart, Huiman X., Yuliya Lokhnygina, Andrzej S. Kosinski, and Michael Haber. "Comparison of Concordance Correlation Coefficient and Coefficient of Individual Agreement in Assessing Agreement." Journal of Biopharmaceutical Statistics 17, no. 4 (2007): 721–38. http://dx.doi.org/10.1080/10543400701329497.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Lipovetsky, Stan. "Canonical Concordance Correlation Analysis." Mathematics 11, no. 1 (2022): 99. http://dx.doi.org/10.3390/math11010099.

Full text

Abstract:

A multivariate technique named Canonical Concordance Correlation Analysis (CCCA) is introduced. In contrast to the classical Canonical Correlation Analysis (CCA) which is based on maximization of the Pearson’s correlation coefficient between the linear combinations of two sets of variables, the CCCA maximizes the Lin’s concordance correlation coefficient which accounts not just for the maximum correlation but also for the closeness of the aggregates’ mean values and the closeness of their variances. While the CCA employs the centered data with excluded means of the variables, the CCCA can be understood as a more comprehensive characteristic of similarity, or agreement between two data sets measured simultaneously by the distance of their mean values and the distance of their variances, together with the maximum possible correlation between the aggregates of the variables in the sets. The CCCA is expressed as a generalized eigenproblem which reduces to the regular CCA if the means of the aggregates are equal, but for the different means it yields a different from CCA solution. The properties and applications of this type of multivariate analysis are described. The CCCA approach can be useful for solving various applied statistical problems when closeness of the aggregated means and variances, together with the maximum canonical correlations are needed for a general agreement between two data sets.

APA, Harvard, Vancouver, ISO, and other styles

26

Hutson, Alan D., and Han Yu. "A robust permutation test for the concordance correlation coefficient." Pharmaceutical Statistics 20, no. 4 (2021): 696–709. http://dx.doi.org/10.1002/pst.2101.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Chinchilli, Vernon M., Juliann K. Martel, Shiriki Kumanyika, and Tom Lloyd. "A Weighted Concordance Correlation Coefficient for Repeated Measurement Designs." Biometrics 52, no. 1 (1996): 341. http://dx.doi.org/10.2307/2533172.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Carrasco, Josep L., and Lluís Jover. "Estimating the Generalized Concordance Correlation Coefficient through Variance Components." Biometrics 59, no. 4 (2003): 849–58. http://dx.doi.org/10.1111/j.0006-341x.2003.00099.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Feng, Dai, Richard Baumgartner, and Vladimir Svetnik. "A Robust Bayesian Estimate of the Concordance Correlation Coefficient." Journal of Biopharmaceutical Statistics 25, no. 3 (2014): 490–507. http://dx.doi.org/10.1080/10543406.2014.920342.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Feng, Dai, Richard Baumgartner, and Vladimir Svetnik. "A short note on jackknifing the concordance correlation coefficient." Statistics in Medicine 33, no. 3 (2013): 514–16. http://dx.doi.org/10.1002/sim.5931.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Gordon, Amber S., Ashly C. Westrick, Michael I. Falola, Chevis N. Shannon, Beverly C. Walters, and Winfield S. Fisher. "Reliability of postoperative photographs in assessment of facial nerve function after vestibular schwannoma resection." Journal of Neurosurgery 117, no. 5 (2012): 860–63. http://dx.doi.org/10.3171/2012.8.jns12158.

Full text

Abstract:

Object This study was undertaken to assess the reliability of observations of postoperative photographs in assigning House-Brackmann scores as outcome measures for patients following resection of vestibular schwannomas. Methods Forty pictures of differing facial expressions typically elicited from patients for assigning House-Brackmann scores were individually evaluated by neurosurgery residents and faculty members at the University of Alabama at Birmingham; a score was assigned to each picture by the individual raters. The interrater reliability was measured using the Spearman correlation coefficient, Kendall coefficient of concordance, and kappa statistic; internal consistency was calculated using the Cronbach alpha reliability estimate. Results The Spearman correlation coefficients showed strong positive association among raters, with a range of values of 0.66 to 0.90. Internal consistency measured by the Cronbach alpha coefficient was excellent (α = 0.97). The Kendall coefficient of concordance for the ordinal grades suggested a substantial degree of agreement among the raters (w = 0.76, p < 0.001). Conclusions Static postoperative photographs are a reliable outcome measure for determining facial nerve function after vestibular schwannoma resection and may serve as a surrogate for the dynamic patient interview.

APA, Harvard, Vancouver, ISO, and other styles

32

Merino, Jordi, Sarah Berry, Sajaysurya Ganesh, et al. "Precision Nutrition and Reliability of Continuous Glucose Monitors: Insights From the PREDICT Study." Current Developments in Nutrition 5, Supplement_2 (2021): 513. http://dx.doi.org/10.1093/cdn/nzab041_028.

Full text

Abstract:

Abstract Objectives The use of continuous glucose monitors (CGM) provides a more in-depth characterization of glycemic variation in response to environmental stimuli, but concerns about CGM reliability for categorizing glycemic responses to foods and meals exist. We sought to evaluate the concordance and reliability of two simultaneously worn CGM devices on postprandial glycemic responses. Methods We examined the correlation and coefficient of variation of the 2h glucose incremental area under the curve (iAUC) for 21,527 standardized and ad libitum meals consumed by 368 healthy participants from the PREDICT-1 Study. Included participants were simultaneously monitored with either two Abbott Freestyle Libre Pro devices (n = 339, same device group) or the combination of Abbott Freestyle Libre Pro and Dexcom G6 devices (n = 29, inter device group). Within-subject 2 h iAUC glucose meal rankings for paired CGM devices were assessed using the Kendal-tau measure for ranking concordance. Results The correlation coefficient of the 2 h glucose iAUC for paired CGM devices was 0.97 (95% CI, 0.96 to 0.97) for same device comparisons and 0.78 (0.76 to 0.80) for inter device comparisons. The coefficient of variation of the 2 h glucose iAUC for standardized meals was 5.1% (interquartile range, 2.2 to 10.1) for same device comparisons and 15.1% (5.9 to 31.2) for inter device comparisons. Similar results were observed for ad libitum meals with same and inter device coefficients of variation of 8.9% (3.3 to 21.3) and 24.2% (10.2 to 53.1%), respectively. Meal rankings for the 2 h glucose iAUC were concordant between paired CGM devices, with a mean Kendall rank correlation coefficient of 0.86 (sd = 0.07) for same device comparisons and 0.63 (sd = 0.011) for inter device comparisons. Conclusions These data provide evidence for repeatability and concordance for ranking of glycemic responses, and suggest that factors other than CGM sensors mostly drive within-subject meal categorization. Our findings are critical for identifying sources of variability in glycemic responses for the eventual implementation of precision nutrition. Funding Sources Zoe Global, UK Government Department of Health and Social Care, Wellcome Trust. National Institutes of Health.

APA, Harvard, Vancouver, ISO, and other styles

33

Na, Kwon Joong, Samina Park, Hyun Joo Lee, In Kyu Park, Chang Hyun Kang, and Young Tae Kim. "Comparison between lung perfusion scan and single-photon emission computed tomography/computed tomography for predicting postoperative lung function after pulmonary resection in patients with borderline lung function." European Journal of Cardio-Thoracic Surgery 58, no. 6 (2020): 1228–35. http://dx.doi.org/10.1093/ejcts/ezaa211.

Full text

Abstract:

Abstract OBJECTIVES We compared the usefulness of single-photon emission computed tomography/computed tomography (SPECT/CT) and lung perfusion scintigraphy (LPS) for predicting postoperative lung function by comparing patients with borderline lung function. METHODS A total of 274 patients who underwent simultaneous LPS and SPECT/CT and had a forced expiratory volume in 1 s (FEV1) or diffusing capacity for carbon monoxide (DLCO) under 80% were included. The % uptake by LPS was calculated by the posterior-oblique method. The concordance and difference of the % uptake, predicted postoperative (ppo) FEV1 and ppoDLCO as determined by 2 methods were evaluated. The association between ppo values and actual postoperative FEV1 and DLCO was examined. Subgroup analysis was conducted in redo-operation cases. RESULTS The % uptake of each lobe, except the right middle lobe, showed fair concordance (concordance correlation coefficients for right upper, middle, lower, left upper and lower lobe = 0.61, 0.37, 0.71, 0.66 and 0.69, respectively). ppoFEV1 and ppoDLCO also revealed high concordance between both methods (concordance correlation coefficient = 0.93 for ppoFEV1 and concordance correlation coefficient = 0.92 for ppoDLCO) without a significant difference (P = 0.42 for ppoFEV1; P = 0.31 for ppoDLCO). Both ppoFEV1 and ppoDLCO showed a significantly high correlation with the actual FEV1 (r = 0.77, P &lt; 0.01 for LPS, r = 0.77, P &lt; 0.01 for SPECT/CT) and DLCO (r = 0.62, P &lt; 0.01 for LPS, r = 0.62, P &lt; 0.01 for SPECT/CT). High concordance of % uptake, ppoFEV1 and ppoDLCO was present in redo-operation patients. CONCLUSIONS Both LPS and SPECT/CT showed high predictability for actual postoperative lung function, and LPS showed good performance to estimate ppoFEV1 and ppoDLCO with reference to SPECT/CT, even in redo-operation cases.

APA, Harvard, Vancouver, ISO, and other styles

34

Tsai, Miao-Yu, Chia-Ni Sun, and Chao-Chun Lin. "Concordance correlation coefficients estimated by modified variance components and generalized estimating equations for longitudinal overdispersed Poisson data." Statistical Methods in Medical Research 31, no. 2 (2021): 267–86. http://dx.doi.org/10.1177/09622802211065156.

Full text

Abstract:

For longitudinal overdispersed Poisson data sets, estimators of the intra-, inter-, and total concordance correlation coefficient through variance components have been proposed. However, biased estimators of quadratic forms are used in concordance correlation coefficient estimation. In addition, the generalized estimating equations approach has been used in estimating agreement for longitudinal normal data and not for longitudinal overdispersed Poisson data. Therefore, this paper proposes a modified variance component approach to develop the unbiased estimators of the concordance correlation coefficient for longitudinal overdispersed Poisson data. Further, the indices of intra-, inter-, and total agreement through generalized estimating equations are also developed considering the correlation structure of longitudinal count repeated measurements. Simulation studies are conducted to compare the performance of the modified variance component and generalized estimating equation approaches for longitudinal Poisson and overdispersed Poisson data sets. An application of corticospinal diffusion tensor tractography study is used for illustration. In conclusion, the modified variance component approach performs outstandingly well with small mean square errors and nominal 95% coverage rates. The generalized estimating equation approach provides in model assumption flexibility of correlation structures for repeated measurements to produce satisfactory concordance correlation coefficient estimation results.

APA, Harvard, Vancouver, ISO, and other styles

35

Podvezko, Valentinas. "AGREEMENT OF EXPERT ESTIMATES." Technological and Economic Development of Economy 11, no. 2 (2005): 101–7. http://dx.doi.org/10.3846/13928619.2005.9637688.

Full text

Abstract:

The application of multicriteria methods largely depends on the calculation of the criteria weights based on expert evaluation. The results obtained can be used for practical purposes if expert judgments are in good agreement. This may be determined by the concordance of a coefficient obtained by ranking the available alternatives. The paper considers a possibility to apply the concordance coefficient in cases when expert evaluation is not based on ranking. The calculations reveal the dependence of the agreement of expert estimates on a particular method used. The highest degree of agreement has been obtained by using the direct ranking method. The effect of equally assessed criteria, i. e. the tied ranks on the concordance coefficient and thereby on the level of expert judgments agreement is usually insignificant and cannot change the results of rating.

APA, Harvard, Vancouver, ISO, and other styles

36

BHATTACHARJEE, Atanu, and Tapesh BHATTACHARYYA. "Bayesian Concordance Correlation Coefficient with Application to Repeatedly Measured Data." Turkiye Klinikleri Journal of Biostatistics 7, no. 2 (2015): 55–62. http://dx.doi.org/10.5336/biostatic.2015-46702.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Nickerson, Carol A. E. "A Note On "A Concordance Correlation Coefficient to Evaluate Reproducibility"." Biometrics 53, no. 4 (1997): 1503. http://dx.doi.org/10.2307/2533516.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Xu, Weichao, Zhaoguo Chen, Yun Zhang, and Lianglun Cheng. "Order Statistics Concordance Coefficient With Applications to Multichannel Biosignal Analysis." IEEE Journal of Biomedical and Health Informatics 21, no. 5 (2017): 1206–15. http://dx.doi.org/10.1109/jbhi.2016.2616512.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Barnhart, Huiman X., Michael Haber, and Jingli Song. "Overall Concordance Correlation Coefficient for Evaluating Agreement Among Multiple Observers." Biometrics 58, no. 4 (2002): 1020–27. http://dx.doi.org/10.1111/j.0006-341x.2002.01020.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Carrasco, Josep L., Lluis Jover, Tonya S. King, and Vernon M. Chinchilli. "Comparison of Concordance Correlation Coefficient Estimating Approaches with Skewed Data." Journal of Biopharmaceutical Statistics 17, no. 4 (2007): 673–84. http://dx.doi.org/10.1080/10543400701329463.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Hebbler, Stephen W. "A BASIC Program for Computing the Coefficient of Concordance, rc." Educational and Psychological Measurement 49, no. 3 (1989): 615–18. http://dx.doi.org/10.1177/001316448904900312.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Lange, N., L. K. Hansen, M. W. Pedersen, R. L. Savoy, and S. C. Strother. "A concordance correlation coefficient for reproducibility of spatial actibation patterns." NeuroImage 3, no. 3 (1996): S75. http://dx.doi.org/10.1016/s1053-8119(96)80077-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Guo, Ying, and Amita K. Manatunga. "Nonparametric Estimation of the Concordance Correlation Coefficient under Univariate Censoring." Biometrics 63, no. 1 (2006): 164–72. http://dx.doi.org/10.1111/j.1541-0420.2006.00664.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

King, Tonya S., and Vernon M. Chinchilli. "A generalized concordance correlation coefficient for continuous and categorical data." Statistics in Medicine 20, no. 14 (2001): 2131–47. http://dx.doi.org/10.1002/sim.845.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Gonzalez-Martin, Cristina, Uxia Fernandez-Lopez, Abian Mosquera-Fernandez, et al. "Concordance between Pressure Platform and Pedigraph." Diagnostics 11, no. 12 (2021): 2322. http://dx.doi.org/10.3390/diagnostics11122322.

Full text

Abstract:

Objectives: Determine the concordance between two methods of obtaining the plantar footprint (pedigraph and pressure platform). Methods: A descriptive, cross-sectional, observational study of prevalence was carried out in the social center of Cariño (Coruña), Spain (n = 65 participants). Older people without amputations or the presence of dysmetria were included. The variables studied were: sociodemographic (age, sex), anthropometric (body mass index) and footprint measurement variables. These measurements were made by obtaining the plantar footprint using two methods: pedigraph and pressure platform. Results: The mean age of the sample was 37.42 ± 15.05 years, with a predominance of the female gender (61.54%). Positive linear correlation between pedigraph and platform was observed in both feet in the Chippaux and Staheli indices (correlation coefficient > 0.3, p < 0.001 in each comparison). The reliability was good or moderate in relation with the Chippaux and Staheli index. Slightly lower coefficients were observed in the dimensions of the foot. Conclusions: A positive linear correlation between pedigraph and platform was observed in both feet in the Chippaux and Staheli indices. Significant differences were observed between pedigraph and platform in relation to the width and length of the foot. It is probably due to the fact that the pressure platform provides more exhaustive, detailed and accurate information of the foot.

APA, Harvard, Vancouver, ISO, and other styles

46

Chen, Chia-Cheng, and Huiman X. Barnhart. "Assessing agreement with intraclass correlation coefficient and concordance correlation coefficient for data with repeated measures." Computational Statistics & Data Analysis 60 (April 2013): 132–45. http://dx.doi.org/10.1016/j.csda.2012.11.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Yasar, Seyma, Saim Yologlu, Ramazan Altintas, Ayse Akatli, and Leyla Karaca. "The evaluation of agreement between the measurement methods used in the diagnosis of prostate cancer with the statistical methods." Medicine Science | International Medical Journal 13, no. 1 (2024): 131. http://dx.doi.org/10.5455/medscience.2023.10.205.

Full text

Abstract:

The aim of this study is to evaluate the compatibility of the "Computed Tomography (CT)" and "Magnetic Resonance (MR)" methods which are imaging techniques used to describe prostate cancer with the pathology accepted as the reference method. In this study, the concordance between CT and MR results and pathology results of 37 prostate cancer patients was evaluated using the Bland-Altman, Interclass Correlation Coefficient, Concordance Correlation Coefficient, Deming Regression and Passing-Bablok method comparison methods. Inter-class correlation coefficient and Concordance Correlation Coefficient values for CT-Pathology results were 0.62 and 0.62, respectively. Inter-class correlation coefficient and Concordance Correlation Coefficient values for MR-Pathology results were 0.74 and 0.75, respectively. The regression equation for the Deming regression method is y=-6.21+1.03x for CT-Pathology, whereas for the MR-Pathology y=-6.86+1.11x. When the CT-Pathology measurement values are evaluated by the Bland-Altman statistical method, the mean values of the measurement differences are -2.42 and the standard deviation is 33.50. When the agreement between MR-Pathology measurement values is examined by the Bland-Altman method, the mean values for the difference between the measurement values are 4.14 and the standard deviation is 26.78. Among the applied methods, the Bland-Altman method is the most suitable method for data structure. According to the results of the Bland-Altman method, the tumor size obtained by the pathology method can be found to be 2.4 smaller than the mean values obtained from the CT results and an average of 4.1 cc from the measurement values obtained by the MR imaging technique.

APA, Harvard, Vancouver, ISO, and other styles

48

Courtwright, Kylie, Michael Daniel, and Paul Michael. "35 Pairwise Concurrence Rates Between Standalone and Embedded Performance Validity Tests." Journal of the International Neuropsychological Society 29, s1 (2023): 716. http://dx.doi.org/10.1017/s1355617723008937.

Full text

Abstract:

Objective:Determine the classification concordance between a standalone performance validity test (PVT) and embedded PVTs from multiple cognitive domains.Participants and Methods:Participants were 106 patients (49.1% female; 69% white) that underwent neuropsychological evaluation at an outpatient university doctoral clinical psychology training and research clinic (M/SD: age = 32.38/11.95; education = 13.7/2.75). A comprehensive neuropsychological battery included the Medical Symptom Validity Test (MSVT) and embedded PVTs from different cognitive domains: attention - Wechsler Adult Intelligence Scale - Fourth Edition Reliable Digit Span and Digit Span age-corrected scaled score (DS ACSS); memory - California Verbal Learning Test, 3rd Edition (CVLT-3) Forced-Choice Recognition (FCR), executive functions -Wisconsin Card Sorting Test (WCST) Failure to Maintain Set (FMS); visual-spatial/construction -Rey Complex Figure Test (RCFT) Copy raw score; language - Boston Diagnostic Aphasia Examination Complex Ideation Material (CIM); and motor functions - Finger Tapping Test (FTT). All participants were administered the MSVT but not all participants were administered all seven embedded PVTs. Credible/noncredible classification concordance rates and kappa correlations (i.e., percentage of agreement) were computed for each pairwise PVT combination.Results:Twenty-two percent (n = 23) of the sample failed at least one PVT, with 17.0% (n = 18) failing at least two. DS ACSS was the embedded PVT with the highest MSVT concordance rate at 92.4% and a fair kappa coefficient of .39; WCST FMS had the lowest concordance with MSVT at 82.9% and a slight kappa coefficient of .19. The highest concordance among embedded PVTs from different cognitive domains was CVLT-3 FCR and RCFT Copy raw score at 89.7% with a fair kappa coefficient of .35; the lowest agreement among embedded PVTs was WCST FMS and FTT at 74.0% with a kappa coefficient of -.02. More conservative kappa coefficients among all pair-wise embedded PVT combinations from different cognitive domains ranged from -.02 to .36. For all standalone and embedded PVT pairwise concordance rates, only two fell below the recommended minimum agreement of 80%: FCR vs. FMS = 79.3% and FMS vs. FTT = 74.0%.Conclusions:Embedded PVTs across various cognitive domains have high agreement with a standalone PVT to aid in classifying noncredible performance, in the 83-92% range. Embedded PVTs from different cognitive domains also have mostly high agreement classification rates amongst themselves in aiding to determine noncredible performance, in the 74-90% range, with the lowest agreement rate between executive function and motor tests at 74%. More conservative kappa-based agreements between PVT pair-wise combinations were fairly consistent with other studies, with most being in the fair range. Finally, these findings indicate about a 17% base rate of noncredible cognitive performance in an outpatient university-based clinic.

APA, Harvard, Vancouver, ISO, and other styles

49

VIEIRA, ANDRÉ LUIZ PAGOTTO, JULIANO RODRIGUES DOS SANTOS, and GUILHERME GALITO HENRIQUES. "COMPARATIVE ANALYSIS OF TWO CLASSIFICATION SYSTEMS OF THORACOLUMBAR SPINE FRACTURES." Coluna/Columna 17, no. 1 (2018): 35–38. http://dx.doi.org/10.1590/s1808-185120181701179188.

Full text

Abstract:

ABSTRACT Objective: To evaluate the reproducibility and the interobserver coefficient of concordance between the AO/Magerl and AOSpine classifications for thoracolumbar spine fractures. Methods: Retrospective study of radiographic data analysis. Data were collected from 31 radiographic studies of patients with thoracolumbar spine fracture and distributed to a team involving spinal surgeons and residents. The fractures were classified according to the AO/Magerl and AOSpine classifications. Statistical analysis was performed using the Cohen Kappa test to assess the coefficient of concordance. Results: The Kappa value for interobserver concordance of AO/Magerl classification was κ = 0.70 and standard deviation was 0.16. For the AOSpine classification, we observed κ = 0.76, both with significance level α = 0.05 and P<0.001. Conclusions: We conclude that the interobserver concordance of the new AOSpine classification is similar to the AO/Magerl classification. This conclusion reinforces the reproducibility of the new AOSpine classification. Level of evidence: IV,Type of Study: Case series.

APA, Harvard, Vancouver, ISO, and other styles

50

Hofert, Marius, and Takaaki Koike. "COMPATIBILITY AND ATTAINABILITY OF MATRICES OF CORRELATION-BASED MEASURES OF CONCORDANCE." ASTIN Bulletin 49, no. 03 (2019): 885–918. http://dx.doi.org/10.1017/asb.2019.13.

Full text

Abstract:

AbstractMeasures of concordance have been widely used in insurance and risk management to summarize nonlinear dependence among risks modeled by random variables, which Pearson’s correlation coefficient cannot capture. However, popular measures of concordance, such as Spearman’s rho and Blomqvist’s beta, appear as classical correlations of transformed random variables. We characterize a whole class of such concordance measures arising from correlations of transformed random variables, which includes Spearman’s rho, Blomqvist’s beta and van der Waerden’s coefficient as special cases. Compatibility and attainability of square matrices with entries given by such measures are studied—that is, whether a given square matrix of such measures of concordance can be realized for some random vector and how such a random vector can be constructed. Compatibility and attainability of block matrices and hierarchical matrices are also studied due to their practical importance in insurance and risk management. In particular, a subclass of attainable block Spearman’s rho matrices is proposed to compensate for the drawback that Spearman’s rho matrices are in general not attainable for dimensions larger than three. Another result concerns a novel analytical form of the Cholesky factor of block matrices which allows one, for example, to construct random vectors with given block matrices of van der Waerden’s coefficient.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!