Results 11 to 20 of about 24,946,429 (302)

robustlmm: An R Package for Robust Estimation of Linear Mixed-Effects Models [PDF]

open access: yesJournal of Statistical Software, 2016
As any real-life data, data modeled by linear mixed-effects models often contain outliers or other contamination. Even little contamination can drive the classic estimates far away from what they would be without the contamination.
Manuel Koller
doaj   +3 more sources

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

Model selection in linear mixed effect models

open access: yesJournal of Multivariate Analysis, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Heng Peng, Ying Lu 0005
openaire   +1 more source

Linear Mixed-Effects Models in chemistry: A tutorial [PDF]

open access: yesAnalytica Chimica Acta
A common goal in chemistry is to study the relationship between a measured signal and the variability of certain factors. To this end, researchers often use Design of Experiment to decide which experiments to conduct and (Multiple) Linear Regression, and/or Analysis of Variance to analyze the collected data. Among the assumptions to the very foundation
Andrea Junior Carnoli   +4 more
openaire   +3 more sources

Comparison of linear mixed effects model and generalized model of the tree height-diameter relationship

open access: yesJournal of Forest Science, 2015
Models of height curves generated using a linear mixed effects model and generalized model were compared. Both tested models were also compared with local models of height curves, which were fitted using a nonlinear regression.
Z. Adamec
doaj   +1 more source

Intra‐individual association between C‐reactive protein and insulin administration in postoperative lumbar spinal canal stenosis patients: A retrospective cohort study

open access: yesJournal of Diabetes Investigation, 2020
The association of intra‐individual variability in insulin requirements with C‐reactive protein levels among acute phase patients remains unclear. This retrospective cohort study aimed to evaluate this association.
Ken Kurisu   +5 more
doaj   +1 more source

Application of Random Effects to Explore the Gulf of Mexico Coastal Forest Dynamics in Relation to Meteorological Factors

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
The forest dynamics are usually explained by the precipitation and temperature through fixed effects models using ordinary least squares and geographically weighted regression methods.
Tianyu Li, Qingmin Meng, Qian Du
doaj   +1 more source

Design Evaluation and Optimization of Population Pharmacokinetics Model Using an R Package PopED

open access: yesMathematics, 2023
The rising cost in drug development has led to continuous calls for more efficient and powerful design optimization and analysis tools for pkpd studies.
Howon Ryu, Weng Kee Wong
doaj   +1 more source

Sample size calculation in multi-centre clinical trials

open access: yesBMC Medical Research Methodology, 2018
Background Multi-centre randomized controlled clinical trials play an important role in modern evidence-based medicine. Advantages of collecting data from more than one site are numerous, including accelerated recruitment and increased generalisability ...
Markus Harden, Tim Friede
doaj   +1 more source

Determinants of recommended antenatal care visits among pregnant women in Ethiopia: a generalized linear mixed-effects modeling

open access: yesBMC Pregnancy and Childbirth, 2022
Background Although antenatal care has the potential role to reduce maternal and child morbidity and mortality, utilization of a recommended number of antenatal care visits is still low in Ethiopia.
Hiwotie Getaneh Ayalew   +2 more
doaj   +1 more source

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