Covariate effect
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Part 1 book "Linear models for the prediction of animal breeding values" includes content: Genetic evaluation with different sources of records, genetic covariance between relatives, best linear unbiased prediction of breeding value - univariate models with one random effect, best linear unbiased prediction of breeding value - models with random environmental effects, best linear unbiased prediction of breeding value - models with random environmental effects, methods to reduce the dimension of multivariate models,.... and other contents.
146p oursky06 17-10-2023 3 2 Download
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To define confounding bias in difference-in-difference studies and compare regression- and matching-based estimators designed to correct bias due to observed confounders. This causal model will then guide the specification of an appropriate analytical model (eg, using regression or matching) that can produce unbiased treatment effect estimates. We emphasize the importance of thoughtful incorporation of covariates to address confounding bias in difference-in-difference studies.
10p vigamora 25-05-2023 5 2 Download
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Several studies have identified factors influencing infant mortality, but, to the best of knowledge, no studies assessed the factors considering unequal effects on different survival times of infant mortality in Bangladesh. In this study, it was examined how a set of covariate behaves on different quantile survival times related with the infant mortality.
9p viferrari 29-10-2022 2 2 Download
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In clinical practice, the effect of durvalumab and radiation pneumonitis (RP) on survival after intensity-modulated radiotherapy (IMRT) is not fully understood. The purpose of this retrospective study was to investigate factors related to distant metastasis-free survival (DMFS), progression-free survival (PFS) and overall survival (OS) after IMRT for locally advanced non-small cell lung cancer (LA-NSCLC).
10p vikolindagrabar 27-07-2022 2 1 Download
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Pharmacokinetic estimates for intravenous paracetamol in individual adult cohorts are different to a certain extent, and understanding the covariates of these differences may guide dose individualization. In order to assess covariate effects of intravenous paracetamol disposition in adults, pharmacokinetic data on discrete studies were pooled.
11p viisaacnewton 26-04-2022 10 1 Download
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Linkage among genes experiencing different selection pressures can make natural selection less efficient. Theory predicts that when local adaptation is driven by complex and non-covarying stresses, increased linkage is favored for alleles with similar pleiotropic effects, with increased recombination favored among alleles with contrasting pleiotropic effects.
24p vigalileogalilei 27-02-2022 14 1 Download
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Many factors affect the microbiomes of humans, mice, and other mammals, but substantial challenges remain in determining which of these factors are of practical importance. Considering the relative effect sizes of both biological and technical covariates can help improve study design and the quality of biological conclusions. Care must be taken to avoid technical bias that can lead to incorrect biological conclusions.
12p viaristotle 29-01-2022 37 0 Download
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Spatial transcriptomic studies are becoming increasingly common and large, posing important statistical and computational challenges for many analytic tasks. Here, we present SPARK-X, a non-parametric method for rapid and effective detection of spatially expressed genes in large spatial transcriptomic studies.
25p viarchimedes 26-01-2022 13 0 Download
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Gender and fertility variation have an impact on mating dynamics in a population because they affect the gene exchange among parental members and the genetic composition of the resultant seed crops. Fertility is the proportional gametic contribution of parents to their progeny.
10p vijichea2711 28-05-2021 10 1 Download
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In this study, we estimated site occupancy for Q. verrucospinosa in Bach Ma National Park in order to (1) compare occupancy and detection probabilities for two specific habitat types (primary and secondary forests); (2) to obtain an overall estimate of site occupancy for the entire national park; and (3) to determine the number of microhabitat use individuals.
7p nguathienthan11 06-04-2021 13 2 Download
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Intensity of resistance training history might be omitted or poorly ascertained in prescreening or data questionnaires involving musculoskeletal health. Failure to identify history of high-versus low-intensity training may overlook higher effect sizes with higher intensities and therefore diminish the precision of statistical analysis with resistance training as a covariate and bias the confirmation of baseline homogeneity for experimental group designation.
14p vimariana2711 22-12-2020 10 0 Download
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High-dimensional molecular measurements, e.g. gene expression data, can be linked to clinical time-to-event endpoints by Cox regression models and regularized estimation approaches, such as componentwise boosting, and can incorporate a large number of covariates as well as provide variable selection.
12p vikentucky2711 24-11-2020 10 1 Download
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Next generation sequencing provides a count of RNA molecules in the form of short reads, yielding discrete, often highly non-normally distributed gene expression measurements. Although Negative Binomial (NB) regression has been generally accepted in the analysis of RNA sequencing (RNA-Seq) data, its appropriateness has not been exhaustively evaluated.
13p vioklahoma2711 19-11-2020 12 1 Download
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Quantitative trait locus (QTL) mapping in genetic data often involves analysis of correlated observations, which need to be accounted for to avoid false association signals. This is commonly performed by modeling such correlations as random effects in linear mixed models (LMMs).
5p viconnecticut2711 28-10-2020 12 1 Download
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For many practical hypothesis testing (H-T) applications, the data are correlated and/or with heterogeneous variance structure. The regression t-test for weighted linear mixed-effects regression (LMER) is a legitimate choice because it accounts for complex covariance structure.
14p vijisoo2711 27-10-2020 10 1 Download
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This research used quasi-experiment design with Nonrandomized Pre-Test Post-Test Control Group Design Experiment.
10p lucastanguyen 01-06-2020 9 2 Download
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The administration of ketones to induce a mild ketosis is of interest for the alleviation of symptoms associated with various neurological disorders. This study aimed to understand the pharmacokinetics (PK) of D-β-hydroxybutyrate (BHB) and quantify the sources of variability following a dose of (R)-3-hydroxybutyl (R)-3-hydroxybutyrate (ketone monoester). Healthy volunteers (n = 37) were given a single drink of the ketone monoester, following which, 833 blood BHB concentrations were measured. Two formulations and five dose levels of ketone monoester were used.
11p caothientrangnguyen 09-05-2020 14 1 Download
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Antibiotics are frequently prescribed to children, and may be an environmental influence that contributes to the increasing prevalence of childhood obesity. The aim of this study was to examine the effect of antibiotic use in the first year of life on child growth trajectories from birth to age 6 years including significant covariates.
9p vidublin2711 13-01-2020 11 1 Download
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The aim of this paper is to develop a reliable and valid e-learning quality measurement scales from the learner as well as faculty perspectives in Indian context. Exploratory factor analysis followed by confirmatory factor analysis was done which is presented in two forms; covariance model and the structural model.
18p caygaocaolon1 12-11-2019 35 3 Download
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The purpose of this study was to investigate the effects of integrated information literacy in first-grade science curriculum on students‟ science learning. In this quasi-experimental study, two first-grade classrooms from a public elementary school were randomly assigned into the experimental group and control group. The former accepted an inquiry-based science curriculum infused information literacy using the Super3 model, while the latter accepted the traditional lecture-oriented instruction.
13p quenchua1 06-11-2019 20 1 Download