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Re: st: Treating multiple-variables as one


From   "Ziad El-Khatib" <Ziad.El-Khatib@ki.se>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Treating multiple-variables as one
Date   Thu, 4 Sep 2008 05:42:32 -0700

Hi Mike!
If I understood your text well, you might have to score the variables
into one variable, depending on what condition you are looking for?

Best regards
ziad


On Thu, Sep 4, 2008 at 5:39 AM, Mike Schmitt <mrschmitt@gmail.com> wrote:
> I'm a very new Stata user (using Stata/SE 10.1) and I'm currently
> running into an issue where I have multiple measures of patient
> medications.  Varying patients have varying numbers of drugs and the
> current analysis that I am hoping to do would be based on drug class
> (i.e., medications for high blood pressure).
>
> The problem is, I have multiple variables accounting for medication
> observation (drug1, drug2, drug3, and so on).  So for some patients
> drug1 may be their blood pressure medication and for other drug3 may
> be their blood pressure medication and if there was only one high
> blood pressure drug per person, I could recode into a new variable
> without an issue.
>
> My problem is that some patients are on multiple blood pressure
> medications.  So even if I want to run a simple command, such as
> tabulating frequencies, I don't know how to (or if it is possible) to
> treat the drug* variables as one measure of total medications taken by
> the patients in the study.
>
> What I am looking to do is have Stata treat drug1 through drug* as one
> measure despite the fact that observations were done at the patient
> level.  My final hope would to be correlate all the drug observations
> with another patient variable (i.e, age) to look at prescribing trends
> based on demographic factors.
>
> If any one has guidance on this issue, I'd appreciate to hear from you.  Thanks,
>
> Mike Schmitt
> michael-schmitt@ouhsc.edu
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