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

[Lucy Leigh]

Excellent! Thank you for your help.

-----Original Message-----
From: Therneau, Terry M., Ph.D. [mailto:therneau at mayo.edu] 
Sent: Monday, 17 March 2014 11:15 PM
To: Lucy Leigh; r-help at R-project.org
Cc: David Winsemius
Subject: Re: survfit question - Q1 and Q3 survival time?

Try help("quantile.survfit")

Terry Therneau

----------- begin included message ------- 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