Re: [R] output of variance estimate of random effect from a gamma frailty model using Coxph in R

From: Thomas Lumley <tlumley_at_u.washington.edu>
Date: Fri 22 Jul 2005 - 06:06:30 EST

On Thu, 21 Jul 2005 ghwei@umich.edu wrote:

> Hi,
>
> I have a question about the output for variance of random effect from a gamma
> frailty model using coxph in R. Is it the vairance of frailties themselves or
> variance of log frailties? Thanks.
>

For a Gamma frailty model it is the variance of the Gamma distribution, so the variance of the frailties. For Gaussian frailty it will be the log frailties, though.

         -thomas



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