Thanks Kevin. I thought the time t is at the end of follow-up (length of
follow-up)?
John
--- On Thu, 5/6/10, Kevin E. Thorpe wrote:
> From: Kevin E. Thorpe
> Subject: Re: [R] sample size for survival curves
> To: "array chip"
> Cc: r-help@r-project.org
> Date: Th
p1=0.8 and p2=0.6 at 5 years at 5%
significance level with 80% power"
any comments are appreciated.
Â
John
--- On Thu, 5/6/10, Joris Meys wrote:
From: Joris Meys
Subject: Re: [R] sample size for survival curves
To: "array chip"
Date: Thursday, May 6, 2010, 8:12 PM
On 05/06/2010 07:20 PM, Kevin E. Thorpe wrote:
array chip wrote:
Dear R users, I am not asking questions specifically on R, but I know
there are many statistical experts here in the R community, so here it
goes my questions:
Freedman (1982) propose an approximation of sample size/power
calculat
array chip wrote:
Dear R users, I am not asking questions specifically on R, but I know there are
many statistical experts here in the R community, so here it goes my questions:
Freedman (1982) propose an approximation of sample size/power calculation based
on log-rank test using the formula b
Dear R users, I am not asking questions specifically on R, but I know there are
many statistical experts here in the R community, so here it goes my questions:
Freedman (1982) propose an approximation of sample size/power calculation based
on log-rank test using the formula below (This is what n
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