[R] survfit question - Q1 and Q3 survival time?

[David Winsemius]

I don't have access to a computer that will run R at the moment but if I were tackling this, I would first look at the code for summary.survfit and adapt the code that extracts the median ( the 50th percentile ).

-- 
David

Sent from my iPhone

> On Mar 15, 2014, at 1:43 PM, Lucy Leigh <lucy.leigh at newcastle.edu.au> wrote:
> 
> Hello,
> 
> I am using the function survfit in the 'survival' package. Calling the function produces the median survival
> time automatically, as below.
> sleepfit <- survfit(Surv(timeb, death)~1)
>> sleepfit
> Call: survfit(formula = Surv(timeb, death) ~ 1)
> 
> records   n.max n.start  events  median 0.95LCL 0.95UCL
> 10761.0 10761.0 10761.0  5289.0    15.5    15.5    15.5
> 
> I was wondering, is it possible to also output the quartiles Q1 and Q3 survival times?
> 
> Regards,
> Lucy
> 
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> 
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