Re: [NMusers] Time-varing covariate and renal function as a covariate

2013-09-06 Thread J.H. Proost
Dear Joe, Thank you for your reply. You are right that one can model renal clearance using SeCr as you described. In fact, your approach is number three, after Nick's and mine (the order is purely arbitrary). It would be interesting to see real life examples and Monte Carlo simulations to see

Re: [NMusers] Time-varing covariate and renal function as a covariate

2013-09-02 Thread J.H. Proost
Dear Matt, I'm not quite sure that I fully understand your question. I would say that a changing renal function and a changing weight over time can be handled as described earlier by Nick Holford, or by the modified approach I suggested. An important point is how to express renal function. Ni

Re: [NMusers] Time-varing covariate

2013-08-26 Thread J.H. Proost
Dear Nick, In your reply to Siwei, you proposed the following code: $PK ; CL=(CLnon-renal*f(age) + CLrenal*f(renal_function)) * allometric WT CL=(THETA(1)*EXP(THETA(2)*(AGE-40)) + THETA(3)*CLCR/100)*(WT/70)**0.75 I would like to make a comment on the coding of the renal function. If CLCR is

[NMusers] Re: job opening

2012-11-26 Thread J.H. Proost
Postdoctoral position Pharmacokinetic-Pharmacodynamic Modeling and Analysis The University of Groningen, The Netherlands, has an opening for a postdoctoral fellow for 2 years in the Division of Pharmacokinetics, Toxicology and Targeting in a project funded by the Top Institute Pharma. For inf