Hi Tina,
It looks like you have told stata that any value in "TimetoEvent" equals a failure, hence your result when you try to set your data. Changing the failure statement in your stset command to failure(TimetoEvent==1) may work.
HR
________________________________________
From: [email protected] [[email protected]] On Behalf Of Tina Hernandez-Boussard [[email protected]]
Sent: Monday, August 24, 2009 5:56 PM
To: [email protected]
Subject: st: survival analysis
Hi All,
I am having problems viewing the graph I want using stset.
I have a dataset that contains 398 patients with 58 failures
I have the following variables:
followupTime TimetoEvent ID
I have set things up as such (1 row per patient):
stset followupTime , failure(TimetoEvent )
failure _d: TimetoEvent
analysis time _t: followupTime
I have tried to make TimetoEvent a dummy variable, with 0/1 instead
of time of event.
However, when I get the graphs, I have everyone with an event. I
should only have 58 events. Can someone please help on what I have
done wrong with the setup?
Thanks!
Tina
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