Group Leader Statistics, Principal Scientist II
Tim joined Metrum in 2019, bringing 12 years of experience in the pharmaceutical industry. He attained his Ph.D. in Statistics from the University of Queensland, where he applied optimal design methods to PK/PD models. He then worked at Eli Lilly and Company in the PK/PD & Pharmacometrics department, using modeling and simulation to inform decision making in all phases of drug development across a range of therapeutic areas.
December 6, 2024
Presented at ACoP 2024. A longitudinal joint model of modified mayo scores and dropout for patients with ulcerative colitis receiving etrasimod was developed in two Phase 3 studies. This poster presents the development of the model in a Bayesian framework, illustrating the ability of the model to adequately describe changes in efficacy scores in the presence of a spike in dropout at the end of a maintenance phase.
December 6, 2024
Presented at ACoP 2024. A Gompertz distribution is implemented in Stan and brms to enable cure rate survival modeling. The Gompertz brms family can be used to model exposure-response data in a Bayesian framework where a proportion of the population never experiences the event of interest.
November 13, 2024
Presented at ACoP 2024. The aim was to provide a simple, reproducible, and traceable method for generating parameter tables in R for NONMEM. models. Attainedvia a new package (pmparams): a stable and easy-to-use tool intended to integrate with, and extend the functionality of, existing packages in the Metrum Research Group Ecosystem (MeRGE)