Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, is already up and running.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Cox survival-patients who die at entry

From   Steve Samuels <>
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.


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
*   For searches and help try:

*   For searches and help try:

© Copyright 1996–2016 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index