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st: STATA command for clustering at two levels during a Stepwise Binary Logistic Regression Analysis


From   Marina Richardson <mricha22@uwo.ca>
To   statalist@hsphsun2.harvard.edu
Subject   st: STATA command for clustering at two levels during a Stepwise Binary Logistic Regression Analysis
Date   Tue, 08 Dec 2009 11:47:56 -0500

I am performing Forward and Backward Stepwise Binary Logistic Regression Models for which I would like to account for clustering at two levels. The option for clustering at one level is simply cluster(PATID) however I would like to also control for clustering at DOCID. Does anyone know if this is possible and what the syntax is for the command? Thank you.

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