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st: stsplit for for data with multiple records per subject


From   "Weichle, Thomas" <Thomas.Weichle@va.gov>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: stsplit for for data with multiple records per subject
Date   Tue, 22 Dec 2009 13:57:11 -0600

Hi Statalisters,
I am working with data that consists of multiple records per subject and
would like to split the data at to create a time varying covariate.
However, the event in which I would like to split can occur multiple
times per subject as well.  The code I'm using is incorrectly doing the
split.  The code I'm trying is the following:

stsplit cross_ind, at(0) after(time=asis(dx_to_claim_day))

So, starting at the reference time of diagnosis, I'm trying to split
each time a subject "crosses" a particular defined point and this
crossing can occur multiple times.

Tom Weichle
Math Statistician
Center for Management of Complex Chronic Care (CMC3)
Hines VA Hospital, Bldg 1, C202
708-202-8387 ext. 24261
Thomas.Weichle@va.gov 

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