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

From: Essioux, Laurent <laurent.essioux_at_roche.com>
Date: Tue, 08 Apr 2008 11:17:23 +0200

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


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