I can't comment on frailtypack issues, but would like to mention that coxme will handle
nested models, contrary to the statement below that "frailtypack is perhaps the only ....
for nested survival data".
To reprise the original post's model
cgd.nfm <- coxme(Surv(Tstart, Tstop, Status) ~ Treatment + (1 | Center/ID),
data=cgd.ag)
And a note to the poster-- you should reprise the original message to which you are
responding.
Terry Therneau
On 10/09/2013 05:00 AM, r-help-requ...@r-project.org wrote:
Hello,
I am encountering very similar problems with frailtypack (only, it seems, 3
years later). I would be incredibly grateful if you would be willing to
share any solutions you happened upon for the problem you mention. I have a
datafile that is even longer than yours (over 15000 events). Events follow a
two-level nesting structure. When I attempt to run the nested survival model
in frailtypack the program either stops running entirely or produces an
error message. I have contacted the frailtypack maintainer but have not yet
received a response. It seems that frailtypack is perhaps the only
widely-available platform for the analysis of nested survival data, so the
seeming bugginess of this program is troubling. Please let me know if you
ended up coming up with a solution to your problem or, alternatively,
another program able to run the nested analysis. Thank you so much!
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