Date: Tue, 8 Nov 2011 11:42:46 -0500
Reply-To: "Viel, Kevin" <kviel@SJHA.ORG>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "Viel, Kevin" <kviel@SJHA.ORG>
Subject: Re: Random Intercept and Slope Models
Content-Type: text/plain; charset="iso-8859-1"
Welcome to SAS-L.
Your first source for code should be our archives. Search for posts by Dale McLerran or Stringplayer, David Cassel, Peter Flom, Shawn Haskell, Robin High, Ryan Black, Mathew Zack, among others.
I believe you will find very detailed, lucid explanations and code from these posters.
Kevin Viel, PhD
Senior Research Statistician
Patient Safety & Quality
International College of Robotic Surgery
Saint Joseph's Translational Research Institute
Saint Joseph's Hospital
5671 Peachtree Dunwoody Road, NE, Suite 330
Atlanta, GA 30342
(678) 843-6076: Direct Phone
(678) 843-6153: Facsimile
(404) 558-1364: Mobile
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> -----Original Message-----
> From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On Behalf Of Amir
> Sent: Monday, November 07, 2011 4:26 PM
> To: SAS-L@LISTSERV.UGA.EDU
> Subject: Random Intercept and Slope Models
> Dear all,
> I appreciate the help.First, in a longitudinal data analysis with Random
> Intercept and Random
> Slopes Model, what makes the correlation between the random intercept
> and one or two of the
> random coefficients to be near 1 (with sign positive or negative)?Second,
> is it possible to enter a baseline variable in our model as we have
> done in ANCOVA in the presence of random intercept?It seems I made a
> mistake in my analysis and could not find it? Maybe there is a little bug
> in what I have done. So, Please let me know your illustrations or hints
> on the issue.I would be also thankful if you introduce me some good
> including statistical software codes in SAS. As this the first time I
> write to this list, I will appreciate your great cooperation.
> thank you.
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