Dear Fanny,

I would use either bootstrapping or likelihood profiling, both of them are 
implemented in PsN ('bootstrap' and 'llp').

Kind regards
Max Taubert

________________________________
Von: [email protected] [[email protected]]" im Auftrag 
von "Fanny Gallais [[email protected]]
Gesendet: Mittwoch, 15. Februar 2017 11:55
An: [email protected]
Betreff: [NMusers] Parameter uncertainty

Dear NM users,

I would like to perform a simulation (on R) incorporating parameter 
uncertainty. For now I'm working on a simple PK model. Parameters were 
estimated with NONMEM. I'm trying to figure out what is the best way to assess 
parameter uncertainty. I've read about using the standard errors reported by 
NONMEM and assume a normal distribution. The main problem is this can lead to 
negative values. Another approach would be a more computational non-parametric 
method like bootstrap. Do you know other methods to assess parameter 
uncertainty?


Best regards

F. Gallais



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