Poster: Methodology - Covariate/Variability Models

Exposure-safety analysis for oral GLP-1 analogues: the impact of between-occasion variability in drug absorption on nausea probability

Thursday 16 October, 2025

Objectives: MEDI7219 is a novel orally-delivered GLP-1 peptide receptor agonist (RA) developed for the type II diabetes indication and characterized…

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COSSAC (COnditional Sampling use for Stepwise Approach based on Correlation tests) method for covariate search

Thursday 16 October, 2025

Introduction/Objectives: Covariate search is a key element in the modeling process. As it involves a large number of runs, automatic covariate…

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Comparison of approaches for estimating covariate effects in full random effects models

Thursday 16 October, 2025

Objectives: The full random effects modeling (FREM) approach [1] has been developed for covariate model building in nonlinear mixed effects …

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Population pharmacokinetics of ciprofloxacin in critically ill patients-a covariate analysis

Thursday 16 October, 2025

Objective: For critically ill patients, physiological changes result in altered ciprofloxacin pharmacokinetics, possibly causing inadequate drug exposure. We aimed to…

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Operating Characteristics of Stepwise Covariate Selection in Pharmacometric Modeling

Thursday 16 October, 2025

Objectives: Stepwise covariate modeling (SCM) is a widely used tool in pharmacometric analyses to identify covariates that explain source of variability…

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Changes in liver volume – a population-based approach to meta-analysis of paediatric, adult and geriatric populations

Thursday 16 October, 2025

Objectives: Liver volume is a critical parameter for both donor / recipient graft size and as a scaling factor for…

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Nonparametric goodness-of-fit testing for parametric covariate models

Thursday 16 October, 2025

Objectives: Covariates allow to identify patient subpopulations at risk or to individualize drug treatment. While covariate selection criteria have been studied…

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An information-theoretic evaluation of vine copula models for high-dimensional covariate distributions

Thursday 16 October, 2025

Objectives: Statistical modelling of covariate distributions allows to create virtual populations or to impute missing values in a covariate dataset. However,…

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Assessment of propensity score and Mahalanobis distance matching in mixed outcome data

Thursday 16 October, 2025

Objectives: Matching methodology in pharmacometrics has been used by the FDA [1] for determining drug effect in the presence of confounding variables. Common…

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The impact of unmodelled interoccasion variability in bioavailability and absorption on parameter estimates in population pharmacokinetic analysis

Thursday 16 October, 2025

Objectives: In their landmark paper Karlsson and Sheiner [1] showed that ignoring interoccasion variability in pharmacokinetic data can lead to…

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