Date: Wed, 6 Nov 2002 13:33:42 -0500
Reply-To: Candy Kane <candykane@CANDYLAND.ORG>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: Candy Kane <candykane@CANDYLAND.ORG>
Subject: Re: proc MIXED with binary dependent variable
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On 5 Nov 02 19:37:58 GMT, stringplayer_2@YAHOO.COM (Dale McLerran)
>In general, I would classify intraclass correlation of 0.25-0.30
>as a high intraclass correlation. In most of the work which I
>do with random effect models, intraclass correlations are at
>most about 0.05. I would be hesitant about employing GLIMMIX
>with intraclass correlations as large as you report.
>Note, too, that for a binary response, the intraclass correlation
>cannot be gotten directly from the GLIMMIX output. An estimate
>of the variance of the random effect can be gotten from the
>output, but the intraclass correlation cannot be gotten. Just
>out of curiosity, how did you compute the intraclass correlation?
Thanks for the interest DAle. I calculated it as
variance due to the clustering variable / (variance due to the
clustering variable + variance remaining)
from the final proc mixed run. Is this naive?