[R] Difference in Kaplan-Meier estimates plus CI

[Patrick Connolly]

Did you try the survival package?



On Wed, 07-Mar-2012 at 10:50AM -0500, Jason Connor wrote:

|> I thought this would be trivial, but I can't find a package or function
|> that does this.
|> 
|> I'm hoping someone can guide me to one.
|> 
|> Imagine a simple case with two survival curves (e.g. treatment & control).
|> 
|> I just want to calculate the difference in KM estimates at a specific time
|> point (e.g. 1 year) plus the estimate's 95% CI.  The former is
|> straightforward, but the estimates not so much.
|> 
|> I know methods exist such as Parzen, Wei, and Ying, but was surprised not
|> to find a package that included this.
|> 
|> Before I code it up, I thought I'd ask if I was just missing it somewhere.
|> 
|> Thank you
|> Jason
|> 
|> 	[[alternative HTML version deleted]]
|> 
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-- 
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.   
   ___    Patrick Connolly   
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 _( Y )_  	         Average minds discuss events 
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