[R] Extract p-value from survdiff function

[Christos Hatzis]

If 

sdf <- survdiff(...)
 
is your survdiff object, the p-value can be computed as follows:

p.val <- 1 - pchisq(sdf$chisq, length(sdf$n) - 1)

and then use it in your K-M plot.

-Christos

Christos Hatzis, Ph.D.
Nuvera Biosciences, Inc.
400 West Cummings Park
Suite 5350
Woburn, MA 01801
Tel: 781-938-3830
www.nuverabio.com
 


> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Armin Goralczyk
> Sent: Thursday, April 26, 2007 3:03 PM
> To: R-help at stat.math.ethz.ch
> Subject: [R] Extract p-value from survdiff function
> 
> Hi list,
> I want to use the p-value from the survdiff function (package
> survival) to reuse within a function in a Kaplan-Meier plot. 
> The p-value is somehow not a component of the value list ?!
> 
> Thanks in advance
> --
> A. Goralczyk
> Göttingen, Ger.
> 
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