Re: [NMusers] inclusion of covariates with $PRIOR

2019-05-17 Thread Jakob Ribbing
Dear Anna, Just to answer quickly on the question directed to me: Yes, you understood it correctly. To implement this in practice, since your NONMEM dataset only includes one level for the covariate (all subjects have the same covariate value), you will need to make a small addition to the SCM

Re: [NMusers] inclusion of covariates with $PRIOR

2019-05-17 Thread Anna Chan Kwong
Dear Jakob and Mats, Thank you very much for your kind answers. My questions were general, for different applications. After reading the article by Gisleskog at al. (in particular, the last part of the discussion), I thought it was possible to build a “Model without covariate” with $PRIOR and the

RE: [NMusers] inclusion of covariates with $PRIOR

2019-05-16 Thread Mats Karlsson
Hi Anna, That you want to explore covariate relationships on a parameter suggests that you believe your data contain plenty of information about the parameter. Therefore do you really need to use a prior on the parameter(s) in question? A little more info around what your “base” model is and wh

Re: [NMusers] inclusion of covariates with $PRIOR

2019-05-16 Thread Jakob Ribbing
Dear Anna, The times I have used SCM in combination with a frequentist prior, it has been only to test if a new population is different (i.e. the data used to generate the prior were all of a different population, e.g. healthy volunteers and other indications than the currently-investigated pop