I am working on a cross-over dataset: all my patients received three different treatments, with a washout period. The time in the database starts therefore at t=0 for each of the three periods.
I thought I should use the column RESET for the PK analysis, to inform Phoenix that it is the same individual (with the same etas), with RESET=1 at pre-dose time. However, when I tried, Phoenix was unable to run because it doesn't recognize my covariates ... Is there a problem with covariates when using RESET column? Is there an other way to estimate PK parameters from a cross-over?