Abstract:
The field of modelling, multilevel data is a new approach. This research study examines the emerging role of modelling
multilevel data in the context of analysing the factors associated with number of deaths due to road traffic accidents and type of
road user which has the highest death rate. One of the objectives of this project is to perform a missing value imputation in the
context of multilevel data. It was successfully obtained by performing multiple imputation using ‘jomo’ package in R statistical
software. Generalized linear mixed models (GLMM) within the ‘Glimmix’ procedure of ‘SAS’ software was used to model the
number of road deaths response and type of road user which has the highest death rate response. The study was based on data
which were retrieved from the “GLOBAL STATUS REPORT ON ROAD SAFETY 2015” which was published by World
Health Organization. It consists of worldwide data related to socioeconomic, health and law variables in 180 United Nations
countries in six regions. This study showed that the modelling of the number of road deaths and type of road user which has
the highest death rate could be adequately done using a GLMM with a Negative Binomial model and Multinomial model
respectively. A cluster effect was assumed within regions. The internal and external validation showed that the model predicts
well.
