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Re: st: SVY medians and Elixhauser


From   Mike Butterfield <mcbutterfield@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: SVY medians and Elixhauser
Date   Sun, 14 Apr 2013 11:56:37 -0700

Hi Rich, I appreciate your help on this.

My general question has been--how do you use this elixhauser command?

1. So there are 29 Elixhauser comorbidity variables that should be
created (somehow).  Does this mean that when I run an analysis, I will
have to pick and choose which ones to include as covariates?  For
example, in predicting death from an infection:

logistic died infection elix1 elix12 elix17?

I would think there'd be a more elegant way to do this.

2. I don't understand db elixhaus command itself.  My understanding is
that it's trying to create elixhauser comorbidities for my database,
creating a copy of the database in the process.   When I type "db
elixhaus," I get a pop-up display that asks me to:
1.  Enter a diagnosis code prefix (Is this for my outcome variable?)
2. Enter a diagnostic related group variable name (?)
3. select input and output files (? Does this mean my database and the
new name/location for the copy of the database with these new
elixhauser variables added?)

The "help" information for elixhaus doesn't talk about any of these.

-I supposed that by "diagnosis code prefix" they mean ICD9 for my
outcome variable, but the program wouldn't accept any version that I
offered ("no such diagnosis code prefix")
-Supposing that they were asking for comorbidities to include in the
Elixhauser index to be applied in this particular case, I used the
example of hepatocelluar carcinoma (ICD9=155) and corresponding DRG
code but got the same result.

Best,
-Mike
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