[R] Random Coefficients using coxme

Spencer Graves spencer.graves at pdf.com
Sat Apr 1 20:26:31 CEST 2006

	  Have you tried contacting the authors and / or maintainer for the 
'kinship' package?  Name and email address should appear with 
help(package="kinship");  this does NOT work for me, because I don't 
have "kinship" installed.  From "www.r-project.org" -> CRAN -> (select a 
mirror) -> packages, I learned that "kinship" was developed by "Beth 
Atkinson for pedigree functions [and] Terry Therneau for all other 
functions" and maintained by Jing hua Zhao.  This provided email 
addresses for Atkinson and Therneau but hot for Zhao.

	  If you need more help on this, have you considered 
"www.bioconductor"?  This looks like it might be closer to their 

	  hope this helps.
	  spencer graves

Powers, Mark wrote:

> Hello, I was hoping someone could answer a question for me that may
> either be statistical or script related.  I don't come from a statistics
> background, so I am not positive if I am using the correct nomenclature
> or even the correct procedure.  Is it possible to model "random
> coefficients" in a mixed effects cox-regression using coxme from the
> Kinship package?  For example, using lmer from the lme4 package, I can
> model V1 and V2 as a fixed & random coefficient:
> Mod1=lmer(y ~ V1 + V2 + V3 + V4 + (1 + V1 + V2|GROUP))
> Can I do something like this, though correctly without getting the error
> ("Error in max(kindex) : object "kindex" not found")?
> Mod2=coxme(Surv(YDAYS, Y) ~ V1 + V2 + V3 + V4, data=ds1, random=~1 + V1
> + V2|GROUP
> The GROUP variable is a census tract, while V1 & V2 are individual-level
> characteristics of people. Thanks in advance.
> Mark Powers
> mark.powers at illinois.gov
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