Results 1 to 10 of about 28,374 (231)

Study of partial and average conditional Kendall’s tau

open access: yesDependence Modeling, 2021
When the interest is in studying conditional dependencies, and more precisely the strength of conditional dependencies, some kind of averaging over the conditioning random vector may be needed.
Gijbels Irène, Matterne Margot
doaj   +1 more source

Agreement of the modified Medical Research Council and New York Heart Association scales for assessing the impact of self-rated breathlessness in cardiopulmonary disease

open access: yesERJ Open Research, 2022
Background The functional impact of breathlessness is assessed using the modified Medical Research Council (mMRC) scale for chronic respiratory disease and with the New York Heart Association Functional Classification (NYHA) scale for heart failure.
Zainab Ahmadi   +9 more
doaj   +1 more source

Multiple Ordinal Correlation Based on Kendall’s Tau Measure: A Proposal

open access: yesMathematics, 2021
The joint analysis of various ordinal variables is necessary in many experimental studies within research fields such as sociology and psychology. Therefore, the necessary measures of multiple ordinal dependence must be easy to interpret and facilitate ...
Juan M. Muñoz-Pichardo   +3 more
doaj   +1 more source

A link between Kendall’s τ, the length measure and the surface of bivariate copulas, and a consequence to copulas with self-similar support

open access: yesDependence Modeling, 2023
Working with shuffles, we establish a close link between Kendall’s τ\tau , the so-called length measure, and the surface area of bivariate copulas and derive some consequences.
Sánchez Juan Fernández   +1 more
doaj   +1 more source

Early Warning Signals of Financial Crises Using Persistent Homology and Critical Slowing Down: Evidence From Different Correlation Tests

open access: yesFrontiers in Applied Mathematics and Statistics, 2022
In this study, a new market representation from persistence homology, known as the L1-norm time series, is used and applied independently with three critical slowing down indicators [autocorrelation function at lag 1, variance, and mean for power ...
Mohd Sabri Ismail   +3 more
doaj   +1 more source

Validation of clinical frailty scale in Chinese translation

open access: yesBMC Geriatrics, 2022
Background Identification of frailty is crucial to guide patient care for the elderly. The Clinical Frailty Scale (CFS) is a reliable, synthesis and clinical judgment-based tool. However, a validated Chinese version of CFS (CFS-C) is lacking.
Yi-Chun Chou   +8 more
doaj   +1 more source

Le tau de Kendall et deux variantes pour mesurer la cohérence de variation entre deux séries ordinales, leurs propriétés et leurs valeurs critiques "honnêtes" [PDF]

open access: yesTutorials in Quantitative Methods for Psychology, 2022
A measure of the consistency of variation in a bivariate series of ordinal data, Kendall's tau (\tau) has properties and exhibits distributional characteristics that are distinct from Pearson's r, each coefficient deserving its own interpretation.
Laurencelle, Louis
doaj   +1 more source

Correlation between cerebral biomarkers and optic nerve sheath diameter in patients with severe preeclampsia

open access: yesHypertension in Pregnancy, 2021
Objective: To examine the correlation between plasma cerebral biomarkers (S100B and neuron-specific enolase (NSE)) and ultrasonographic optic-nerve-sheath-diameter (ONSD) in preeclampsia.
Gabrijela Brzan Simenc   +4 more
doaj   +1 more source

Single-index copulae [PDF]

open access: yes, 2017
We introduce so-called "single-index copulae". They are semi-parametric conditional copulae whose parameter is an unknown "link" function of a univariate index only.
Fermanian, Jean-David, Lopez, Olivier
core   +3 more sources

Investigator’s Global Assessment of Chronic Prurigo: A New Instrument for Use in Clinical Trials

open access: yesActa Dermato-Venereologica, 2021
Chronic prurigo is a pruritic disease characterized by the development of pruriginous lesions due to scratching. The number of lesions is representative of the stage of the disease, while the presence of excoriations reflects the scratching activity. Aim
Claudia Zeidler   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy