Results 31 to 40 of about 540,575 (323)

An Efficient Gait Recognition Method for Known and Unknown Covariate Conditions

open access: yesIEEE Access, 2021
Gait is a unique non-invasive biometric form that can be utilized to effectively recognize persons, even when they prove to be uncooperative. Computer-aided gait recognition systems usually use image sequences without considering covariates like clothing
Maryam Bukhari   +7 more
doaj   +1 more source

Analysing mark-recapture-recovery data in the presence of missing covariate data via multiple imputation [PDF]

open access: yes, 2014
We consider mark–recapture–recovery data with additional individual time-varying continuous covariate data. For such data it is common to specify the model parameters, and in particular the survival probabilities, as a function of these covariates to ...
Buckland, Stephen Terrence   +2 more
core   +2 more sources

Applied comparison of large‐scale propensity score matching and cardinality matching for causal inference in observational research

open access: yesBMC Medical Research Methodology, 2021
Background Cardinality matching (CM), a novel matching technique, finds the largest matched sample meeting prespecified balance criteria thereby overcoming limitations of propensity score matching (PSM) associated with limited covariate overlap, which ...
Stephen P. Fortin   +2 more
doaj   +1 more source

On tests of treatment-covariate interactions: An illustration of appropriate power and sample size calculations. [PDF]

open access: yesPLoS ONE, 2017
The appraisals of treatment-covariate interaction have theoretical and substantial implications in all scientific fields. Methodologically, the detection of interaction between categorical treatment levels and continuous covariate variables is analogous ...
Gwowen Shieh
doaj   +1 more source

To Adjust or Not to Adjust? Sensitivity Analysis of M-Bias and Butterfly-Bias

open access: yesJournal of Causal Inference, 2015
“M-Bias,” as it is called in the epidemiologic literature, is the bias introduced by conditioning on a pretreatment covariate due to a particular “M-Structure” between two latent factors, an observed treatment, an outcome, and a “collider.” This ...
Ding Peng, Miratrix Luke W.
doaj   +1 more source

Demystifying Smoker's Paradox: A Propensity Score–Weighted Analysis in Patients Hospitalized With Acute Heart Failure

open access: yesJournal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background Smoker's paradox has been observed with several vascular disorders, yet there are limited data in patients with acute heart failure (HF). We examined the effects of smoking in patients with acute HF using data from a large multicenter registry.
Suhail A. Doi   +19 more
doaj   +1 more source

Unsupervised empirical Bayesian multiple testing with external covariates

open access: yes, 2008
In an empirical Bayesian setting, we provide a new multiple testing method, useful when an additional covariate is available, that influences the probability of each null hypothesis being true.
Ferkingstad, Egil   +4 more
core   +2 more sources

Covariance chains

open access: yesBernoulli, 2006
n ...
N. Wermuth   +2 more
openaire   +4 more sources

The covariant chiral ring [PDF]

open access: yesJournal of High Energy Physics, 2016
19 ...
Bourget, Antoine, Troost, Jan
openaire   +5 more sources

Nonparametric covariate-adjusted regression

open access: yes, 2016
We consider nonparametric estimation of a regression curve when the data are observed with multiplicative distortion which depends on an observed confounding variable.
Delaigle, Aurore   +2 more
core   +1 more source

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