[R] sample size for log-rank test with more than 2 groups

[Frank E Harrell Jr]

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]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 


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