 |
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: finding the last observation in a survival dataset
|
From |
Michael McCulloch <[email protected]> |
|
To |
Statalist <[email protected]> |
|
Subject |
st: finding the last observation in a survival dataset |
|
Date |
Sun, 27 Apr 2008 09:36:11 -0700 |
Hi,
I would like to learn how to identify the last observation of each
individual subject within a longitudinal data set.
I'm using the hip2.dta data set, and have run _stsplit_ to create
one observation per failure time for each subject. Note that subject
id==1 observed a failure during observation time, whereas subject
id==48 did not.
use hip2.dta, clear
stsplit, at(failures) riskset(riskid)
sort id time0
list id time0 time1 protect fracture if id==1 | id==48
In order to estimate a subject's probability of being censored, I
will create a new variable, C, which is equal to zero for a subject's
last failure time if the subject was not censored, and is equal to
one subject was censored.
How can I identify the last observation of each individual subject
within a longitudinal data set, so that I can create my new variable
without having to manually search for that last observation?
--
Best wishes,
Michael McCulloch
Pine Street Foundation
124 Pine St., San Anselmo, CA 94960-2674
Tel: (415) 407-1357
Fax: (415) 485-1065
[email protected]
www.pinestreetfoundation.org
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/