Programming the statistical procedures from SAS

Mutilevel model with time and cluster effects and mediation

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Mutilevel model with time and cluster effects and mediation

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


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‎01-23-2017 03:56 PM
Respected Advisor
Posts: 2,655

Re: Mutilevel model with time and cluster effects and mediation

[ Edited ]

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

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Super User
Posts: 9,779

Re: Mutilevel model with time and cluster effects and mediation

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

@Steve @lvm can give you good advice .

Frequent Contributor
Posts: 140

Re: Mutilevel model with time and cluster effects and mediation

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.
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‎01-23-2017 03:56 PM
Respected Advisor
Posts: 2,655

Re: Mutilevel model with time and cluster effects and mediation

[ Edited ]

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

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Frequent Contributor
Posts: 140

Re: Mutilevel model with time and cluster effects and mediation

Thanks Steve. I will look for it



Peter

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