[R] Kaplan Meier Post Hoc?
marc_schwartz at me.com
Thu Oct 25 00:00:49 CEST 2012
On Oct 24, 2012, at 4:33 PM, Charles Determan Jr <deter088 at umn.edu> wrote:
> This is more of a general question without data. After doing 'survdiff',
> from the 'survival' package, on strata including four groups (so 4 curves
> on a Kaplan Meier curve) you get a chi squared p-value whether to reject
> the null hypothesis or not. Is there a method to followup with pairwise
> testing on the respective groups? I have searched the library but have
> come up with nothing. Perhaps I am mistaken in something here.
Take a look at ?p.adjust, which provides a generic framework for multiple pairwise comparison adjustment methods.
The most conservative, but not always the best approach, would of course be Bonferroni.
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