random vs. fixed [Software]

posted by ElMaestro  – Denmark, 2011-10-08 01:18 (5371 d 02:16 ago) – Posting: # 7448
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Thanks HS,

❝ Right guess. Phoenix/WinNonlin’s default in BE is:

fixed:  Sequence+Formulation+Period

Random: Subject(Sequence)


What Yicaoting then needs is a kind of formula which can render the SE of a mean difference and which allow missing values, hence an maxlikelihood-based solution.

I googled a bit around now and I cannot find it. I am sure this is straightforward given a varcovar matrix for anyone equipped with a brain marginally larger than a walnut, but because of my genetic makeup (intelligence-wise I can only compete with certain amoeba) I am just not capable of deriving it.


EM.

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