Introduction to Generalised Linear Mixed Models using R (online)
Date:
27/11/2024 - 28/11/2024
Organised by:
Statistical Services Centre Ltd
Presenter:
James Gallagher and Sandro Leidi
Level:
Advanced (specialised prior knowledge)
Contact:
James Gallagher
07873873617
jamesgallagher1929@gmail.com
Venue: Online
Description:
Overview of 2-day course
Mixed models have become increasingly popular, as they have many practical applications. However, the traditional linear mixed model with normally distributed errors is not appropriate for modelling discrete responses such as binary data and counts. Such responses are typically analysed using generalised linear models such as logistic regression and Poisson regression.
Commonly-used generalised linear models will be extended to deal with multiple error structures, using a variety of scientific examples, mainly medical and health related applications, such as investigating the presence of adverse events in a clinical trial.
The emphasis will be on practical understanding, although an outline of the theory will be presented. Practical examples will be used to illustrate the methods and participants will have the opportunity to fit and interpret models themselves in hands-on computer practicals.
Practical work will be based on the R software; see https://www.r-project.org/. Model fitting will mainly be done using the CRAN package GLMMadaptive.
Cost
£534 (inclusive of 20% VAT)
Delivery Mode
All training is online and will be delivered live each day between 09:00 and 17:30 (GMT). Delivery platform: Zoom, which may be freely accessed. Questions may be asked using Zoom's chat box. Note our online courses are delivered by a team of two presenters, so one presenter is always available to provide additional support. We also use Zoom meetings rather than webinars to encourage further interaction during an online course.
Who Should Attend?
Data analysts and statisticians working in medicine, health and related areas, who wish to have a practical introduction to Generalised Linear Mixed Models. It is assumed that participants are R users and familiar with the practical use of both generalised linear models and linear mixed models.
How You Will Benefit
You will learn to formulate generalised linear models with both fixed and random effects for a range of situations, how to fit them and how to interpret their output.
What Do We Cover?
- Review of generalised linear models and linear mixed models
- Binary and binomial outcomes: logistic regression with mixed effects
- Count outcomes: Poisson and negative binomial regression with mixed effects
- Ordered outcomes: proportional odds regression with mixed effects
- Adaptive Gauss-Hermite Quadrature fitting method; inferential procedures
- Convergence issues and solutions
- Interpretation of effects in a generalised linear mixed model and prediction
- GLMMadaptive CRAN package for fitting generalised linear mixed models; ordinal CRAN package for fitting the proportional odds model with random effects.
Notes on course content:
- The GLMMadaptive package can currently only fit models where the random effects part is defined by a single grouping factor
- The course does not cover marginal or GEE type models for repeated measurements.
Software
Practical work will be done in R.
Note: For practical work, participants must download and install a number of CRAN packages in R. This must be done prior to the start of the course.
Cost:
£534
Website and registration:
https://www.ssc-training.co.uk/introduction-to-generalised-linear-mixed-models-using-r.html
Region:
International
Keywords:
Generalized liner model (GLM), Logistic regression, Poisson regression, Ordinal regression, Multilevel Modelling , Hierarchical models, Mixed models, Random effects, GLMMadaptive, Clustered data, Mixed negative binomial regression, random effects, adaptive Gaussian quadrature,
Related publications and presentations:
Generalized liner model (GLM)
Logistic regression
Poisson regression
Ordinal regression
Multilevel Modelling
Hierarchical models
Mixed models
Random effects