one option is to use BASE and KOUT as primary parameters and compute KIN=BASE*KOUT
Then one can either fix BASE=(observed base) or use
BASE=(observed base)*EXP(ETA())
to account for the random noise of observations.

Leonid


--------------------------------------
Leonid Gibiansky, Ph.D.
President, QuantPharm LLC
web:    www.quantpharm.com
e-mail: LGibiansky at quantpharm.com
tel:    (301) 767 5566



On 7/27/2015 2:39 PM, Zhao,Li wrote:
Dear NMusers,


Right now I am doing covarite analysis for an indirect response model.


  I tested a few potential covarites and found it's STATISTICALLY
significant if I add *observed baseline valu*e to *kin*.


But I am not sure if it makes sense to add t/he baseline value/ as a
covarite to /kin/.


Could you please help me if you have had similar experiences before?


Thank you very much!

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