Results 11 to 20 of about 23,995,846 (308)

A stochastic mixed effects model to assess treatment effects and fluctuations in home-measured peak expiratory flow and the association with exacerbation risk in asthma [PDF]

open access: yes, 2022
Home-based measures of lung function, inflammation, symptoms, and medication use are frequently collected in respiratory clinical trials. However, new statistical approaches are needed to make better use of the information contained in these data-rich ...
Eriksson, Ulf,   +16 more
core   +1 more source

Estimating basis functions in massive fields under the spatial mixed effects model [PDF]

open access: yes, 2021
Spatial prediction is commonly achieved under the assumption of a Gaussian random field by obtaining maximum likelihood estimates of parameters, and then using the kriging equations to arrive at predicted values.
Pazdernik, Karl, Maitra, Ranjan
core  

Mixed effect models in distance sampling [PDF]

open access: yes, 2013
Recently, much effort has been expended for improving conventional distance sampling methods, e.g. by replacing the design-based approach with a model-based approach where observed counts are related to environmental covariates (Hedley and Buckland, 2004)
Oedekoven, Cornelia Sabrina
core   +2 more sources

The geometry of the lactation curve based on Wood's equation: a two-step prediction

open access: yesRevista Brasileira de Zootecnia, 2020
Lactation records from cows of the southwestern Paraná state, Brazil, form the dataset of this study. We applied the information-theoretic approach to evaluate the ability of the nonlinear Wood, Brody, Dijkstra, and Gamma functions to fit to these data ...
Jhone Gleison de Oliveira   +6 more
doaj   +1 more source

Incorporating random effects in biopharmaceutical control strategies

open access: yesAAPS Open, 2023
Objective Random effects are often neglected when defining the control strategy for a biopharmaceutical process. In this article, we present a case study that highlights the importance of considering the variance introduced by random effects in the ...
Thomas Oberleitner   +4 more
doaj   +1 more source

Mixed-effects model predicting the valence of video content created by older adults on TikTok.

open access: yes, 2023
Mixed-effects model predicting the valence of video content created by older adults on TikTok.
Reuben Ng (692015)   +1 more
core   +1 more source

Practical identifiability in the frame of nonlinear mixed effects models: the example of the in vitro erythropoiesis

open access: yesBMC Bioinformatics, 2021
Background Nonlinear mixed effects models provide a way to mathematically describe experimental data involving a lot of inter-individual heterogeneity.
Ronan Duchesne   +3 more
doaj   +1 more source

A 2-step strategy for detecting pleiotropic effects on multiple longitudinal traits

open access: yesFrontiers in Genetics, 2014
Genetic pleiotropy refers to the situation when a single gene influences multiple traits and so it is considered as a major factor that underlies the genetic correlation among traits.
Weiqiang eWang   +4 more
doaj   +1 more source

A Comparison of Methods for Specifying Optimal Random Effects Structures

open access: yesMethodology, 2023
Using Monte Carlo simulations, this study compared the performance of various approaches to the specification of random effects structures in linear mixed effects models (LMMs), including the minimal approach, the maximal approach, the forward search ...
Wen Luo, Haoran Li
doaj   +1 more source

A mixed model approach for structured hazard regression [PDF]

open access: yes, 2004
The classical Cox proportional hazards model is a benchmark approach to analyze continuous survival times in the presence of covariate information. In a number of applications, there is a need to relax one or more of its inherent assumptions, such as ...
Thomas Kneib   +4 more
core   +1 more source

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