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

Thomas Lumley tlumley at u.washington.edu
Thu Jul 21 22:06:30 CEST 2005


On Thu, 21 Jul 2005 ghwei at 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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