Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: GEE and likelihood ratio test


From   Raoul Reulen <r.c.reulen@bham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: GEE and likelihood ratio test
Date   Tue, 18 Nov 2008 16:51:55 +0000

Hello All,
 
I'm running a logistic regression model with a GEE modification. I understand that I cannot use a likelihood ratio test to test whether there is heterogeneity accross the odds ratios. What is the alternative? A wald test using .testparm? Would this give me the p-value for test for heterogeneity?
 
.xi: xtlogit status i.covar1  , pa corr(exch) i(id) robust eform
.testparm _Icovar*
 
Thanks 
 
Raoul
 
 
Raoul Reulen
Cancer Research UK Graduate Training Fellow
Centre for Childhood Cancer Survivor Studies
Department of Public Health & Epidemiology
University of Birmingham
Birmingham
B15 2TT
tel.: +44 (0)121 414 4946
fax.: +44 (0)121 414 7923
email: r.c.reulen@bham.ac.uk
website: www.bccss.bham.ac.uk <http://www.bccss.bham.ac.uk/> 


*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index