R help - May 2013 - Likelihood ratio test for comparing non-nested cox models

Dear All,

I fitted two non-nested proportional hazards models using the coxph() 
function from package survival. Now, I would like to apply a model 
selection test like, e.g., the likelihood ratio test proposed by Vuong. 
I found an implementation of Vuong's test in the package 'pscl', but
that does not work for cox models.

Is there any package available that provides an implementation of that 
test or can someone point me to an implementation of a similar test?

Thanks in advance!

Hans-Ulrich


-- 
Dr. Hans-Ulrich Klein
Institute of Medical Informatics
University of M?nster
Albert-Schweitzer-Campus 1
Geb?ude A11
48149 M?nster, Germany
Tel.: +49 (0)251 83-58405