Hi all, I have a question regaring T in $DES. I have a time-varying covariate that is derived based on an explicit equation and then use in a differential equation. I got some funny results in the output table and investigated a bit further.
I therefore derived T_DAY=T in $DES as below and output it in $TABLE. Why is T_DAY at TIME=0 equal to the time of the last observation for the patient? I was expecting it to be Zero (same as Time). Seems to be the same for all IDs in the dataset. Below is the output created in $TABLE including the "derived" variable T_DAY. Any advice would be appreciated. Matts Kågedal [image: image.png] [image: image.png]
