Hello,

I am trying to determine how to set up a follow-up analysis. I have significant findings between two groups and I want to see if these findings are dose dependent by adding in a quantative metric. I want to see specifically if there is a positive or negative correlation between one of the groups and this dose metric but the control group does not have this dose metric so I am wondering if this will be possible. How would I go about designing a linear regression model in the NBS accordingly? Would I keep only one group in the design matrix?