to get matched pairs due to PSM ("Matchit"-Package and Method = full) i need to specifiy my command for my longitudinal data frame. Every Case has several obeservations but i only need the f...

I have brain data from two time points coded as 1,2, respectively. I would like to use mgcv::gam to measure the change of each brain region (Y) between time 1 and time 2. Each subject has an ID variab...

I have attached some published data (at the end) that comes from a link on: https://www.middleprofessor.com/files/applied-biostatistics_bookdown/_book/pre-post.html I can run a fairly standard linear ...