R help - Apr 2008 - sample size for log-rank test with more than 2 groups

Hi everyone,

I was wondering whether extension of the current spower function for
Hmisc were existing?

My current focus is to calculate sample size based on the log-rank test
with more than 2 groups (with/without trend)

Taking into account the loss of follow up and the accrual processes.

A SPSS library (ART) is existing but can't find anything in R

Any information is welcome !

Many thanks

Laurent


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Essioux, Laurent wrote:
> Hi everyone,
> 
> I was wondering whether extension of the current spower function for
> Hmisc were existing?
> 
> My current focus is to calculate sample size based on the log-rank test
> with more than 2 groups (with/without trend)
> 
> Taking into account the loss of follow up and the accrual processes.
> 
> A SPSS library (ART) is existing but can't find anything in R
> 
> Any information is welcome !
> 
> Many thanks
> 
> Laurent
spower only implements the two-sample problem.

Frank
> 
> 
> 	[[alternative HTML version deleted]]
> 
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-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University