topic Mutilevel model with time and cluster effects and mediation in Statistical Procedures

Mutilevel model with time and cluster effects and mediation

plf515 — Wed, 12 Oct 2016 15:37:49 GMT

I have a data set that is a bit complex.

People were part of various organizations (there were 80 organizations). Organizations were randomly assigned to one of two treatments (so there is a cluster effect) and measured at three time points (so there is a time effect). The main interest is in mediation and, because the data are quite non-normal, I need to bootstrap the effect sizes.

Any hints on how to approach this would be appreciated.

And, if you're going to SESUG 2016 - maybe we can discuss it there.

I am using SAS 9.4

Re: Mutilevel model with time and cluster effects and mediation

Ksharp — Thu, 13 Oct 2016 02:56:15 GMT

It is longitudinal data (repeated measure). Check PROC GEE/MIXED/GLMMXI ......

@Steve @lvm can give you good advice .

Re: Mutilevel model with time and cluster effects and mediation

plf515 — Thu, 13 Oct 2016 10:22:10 GMT

Thanks K. Yes, PROC MIXED is probably the spot, but I am not sure if it can do this and if so, how it can.

Re: Mutilevel model with time and cluster effects and mediation

SteveDenham — Tue, 01 Nov 2016 19:17:34 GMT

Hi Pete @plf515r,

Someplace in the SAS-L archives there is a piece of code that David Cassell wrote that can be used as a wrapper for almost any kind of randomization test, which ought to include bootstrapping. I think I might have something remaining of it It's from SUGI 27. Hope this helps.

Steve Denham

Re: Mutilevel model with time and cluster effects and mediation

plf515 — Tue, 01 Nov 2016 21:26:57 GMT

Thanks Steve. I will look for it

Peter

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