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st: RE: Survival analysis: excluding patients entering risk set after a specific date


From   "Kieran McCaul" <[email protected]>
To   <[email protected]>
Subject   st: RE: Survival analysis: excluding patients entering risk set after a specific date
Date   Fri, 26 Nov 2010 05:37:27 +0800

....


Why not recode inout to 3 if insertion occurs after 1jan2007 and then specify exit(inout==3)

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of paul o'brien
Sent: Thursday, 25 November 2010 4:07 PM
To: statalist
Subject: st: Survival analysis: excluding patients entering risk set after a specific date

dear all,

i want to exclude from the risk set patients who have a intra-uterine
device inserted after 1st Jan 2007, but continue counting failures
(removals) for earlier insertions to the present.

using before(exp) does not work for me.

stset date, id( patient_id) enter(inout=1) origin(inout=1 time
date+21) failure(inout==2)  before(d(1jan2007))

thanks,

paul

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