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Re: st: SE erroes for xtmixed-predict fitted

From   Steve Samuels <>
Subject   Re: st: SE erroes for xtmixed-predict fitted
Date   Tue, 28 Feb 2012 17:37:57 -0500

You must have missed

where I tried to answer a related questionn. I'm not sure I'm right. If I'm not, I bet that Bobby Gutierrez knows.


On Feb 28, 2012, at 3:50 PM, Ricardo Ovaldia wrote:

I searched the Statalist archives for the answer to the following query and could not find one. Can someone please help.

After using -xtmixed- to fit:

xtmixed cholest i.drug month || patid:month

I used -predict, fitted- to get predicted estimates that account for both the fixed and random effects. 
I them average these over drug and month to get mean predicted cholesterol values for each drug at each time point. 
Is there a way to place a CI or to calculate SE for these estimates?

Thank you,

Ricardo Ovaldia, MS
Oklahoma City, OK
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