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 at the end of May, and its replacement, statalist.org is already up and running.


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

st: How to proceed a landmark survival analysis (tests and plots)?


From   Änne Glass <aenne.glass@uni-rostock.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: How to proceed a landmark survival analysis (tests and plots)?
Date   Wed, 26 Oct 2011 11:54:08 +0200

Hello Statalist,

we are interested in doing a landmark survival analysis with Stata(10.1), comparing therapy1 vs therapy2, before and after a landmark (t=24 months). Our data table consists of id, survivalTime, survivalStatus, therapyGroup.

Following your blog at http://www.stata.com/statalist/archive/2011-02/msg00207.html we did 1) -stset- for declaring data to be survival-time data with _st, _d, __t, _t0. (done) 2) -stsplit- to split data into 2 time-span records with the landmark t=24, that means one pre-landmark and one post-landmark. This step modified our data table by adding one line for those ids going over 24 months. (done) 3) -sts graph- command plotted the Kaplan-Meier failure function for the whole time-span (0-102 months) for both treatments. (done, but not desired)

A step-by-step approach would be great, as we are not yet that proficient in Stata.
Many thanks in advance - Aenne.
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index