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Re: st: Cox survival-patients who die at entry
From
Steve Samuels <[email protected]>
To
[email protected]
Subject
Re: st: Cox survival-patients who die at entry
Date
Mon, 22 Apr 2013 13:37:24 -0400
I assume you have dates in days:
. replace sdate = sdate + 0.5 if (died on day of enrollment)
. stset stdate
Use more exact fractions if you have them.
In some circumstances, a lot of ties can distort the analysis. If you have frequent ties for days of early deaths, then perhaps you should ascertain approximate times of death for all patients with early deaths, not just those who died on day 1.
Steve
[email protected]
On Apr 22, 2013, at 1:11 PM, Po-Lin Chan wrote:
Hi Statalisters,
I am running a Cox survival but have 5 patients who die on the day of
enrolment (ie entry).
Does Stata automatically account for the contribution of these 5 patients
for the total patient time?
Do I need to add additional time to their date of death in stata, and how
do I do this?
Thank you
Polin Chan
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