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Re: st: Testing dependence in a 2x2 table for clustered observations


From   "Michael N. Mitchell" <Michael.Norman.Mitchell@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Testing dependence in a 2x2 table for clustered observations
Date   Wed, 25 Aug 2010 22:13:13 -0700

How about something like this...

. logit recovered i.treatment, cluster(site)

or

. xtset site
. logit recovered i.treatment

Hope that helps!

Michael N. Mitchell
Data Management Using Stata      - http://www.stata.com/bookstore/dmus.html
A Visual Guide to Stata Graphics - http://www.stata.com/bookstore/vgsg.html
Stata tidbit of the week         - http://www.MichaelNormanMitchell.com



On 2010-08-25 12.59 AM, Hoogendoorn, Adriaan wrote:
Dear Statalisters,

I have a very simple 2x2 table Treatment (A or B) versus Recovered (Yes or No).. I would like to test the dependence in the table using a chi square test. However, the observations are not independent but clustered: a multilevel design with patients clustered in approximately twenty "treatment sites".

My question is, in order to take the clustering into account, do I need to use a technique like random coefficient logistic regression? This seems like heavy machinery to solve a simple problem with only a minor complication?

Kind regards,
Adriaan Hoogendoorn
GGZ inGeest, Amsterdam

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