Re: Survival analysis with clustered observations

On Sun, 24 Jun 2007 07:19:33 -0700, "mark@hsph" <mschult@xxxxxx>
wrote:

Hi All:
I have a dataset with paired observations (twins) with time to
event observations. Much of the data is right censored also. I want to
find out if the event times are a function of an observed covariate. I
know that some theoretical work has been done on this problem, but are
there widely available stat packages available (such as SAS macros)
that will handle it?

I've been looking at it lately, and so I know that
SAS proc PHREG (proportional hazard regression)
pretends to solve an enormous number of problems
related to survivorship time, clustering, and so on.

So, that exists.

I would be happy to hear comments or see references
on what does or doesn't work. Including "sandwich
estimators" of variance.

--
Rich Ulrich, wpilib@xxxxxxxx
http://www.pitt.edu/~wpilib/index.html
.

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