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Re: st: Kaplan Meier estimates


From   Ronan Conroy <rconroy@rcsi.ie>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Kaplan Meier estimates
Date   Tue, 3 Mar 2009 11:07:16 +0000

On 3 Márta 2009, at 03:30, Sripal Kumar wrote:

I am trying to calculate the actual number of death in 2 groups
(treatment and intervention) with a 6 year cumulative survival of 41
and 49% based on the Kaplan Meier survival curve (unadjusted).

The actual number of deaths is easily got from your data - tabulate your survival variable.

The problem is getting the death rates, which are based on person- years at risk. Here, Stata's -stir- command will do the work for you, giving the rates based on the available observation time.

At least, I think that's what you're asking...


Ronan Conroy
=================================

rconroy@rcsi.ie
Royal College of Surgeons in Ireland
Epidemiology Department,
Beaux Lane House, Dublin 2, Ireland
+353 (0)1 402 2431
+353 (0)87 799 97 95
+353 (0)1 402 2764 (Fax - remember them?)
http://rcsi.academia.edu/RonanConroy

P    Before printing, think about the environment





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