[R] (no subject)

[Frank E Harrell Jr]

Virginie Rondeau wrote:
> Hello
> I would like to compare the results obtained with a classical non 
> parametric proportionnal hazard model with a parametric proportionnal 
> hazard model using a Weibull.
> 
> How can we obtain the equivalence of the parameters using coxph(non 
> parametric model) and survreg(parametric model) ?
> 
> Thanks
> Virginie

In the Design package look at the pphsm function that converts a survreg 
Weibull fit (fitted by the psm function which is an adaptation of 
survreg) to PH form.

-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University