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Re: st: Confirming whether a variable is binary or continuous


From   Alexander Jais <jais@win.rwth-aachen.de>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Confirming whether a variable is binary or continuous
Date   Sun, 18 Mar 2012 12:40:25 +0100

Sorry, stimmt ist bei mir noch als to do - kommt die Woche. 

Bist wieder aus INdien zurück - wie wars?

LG
Alex

On 03/16/12, Bert Jung  <bjung59@gmail.com> wrote:

> Dear Statalisters,
> 
> I am writing a short program to make a balance table that compares
> covariates across a treatment and control group.  I am looking for a
> way to confirm whether a variable is binary in order to use -prtest-
> for proportions rather than -ttest- for continous variables.
> 
> One option is to check the actual data values and do -prtest- if there
> are only 0's and 1's.  But a continuous but rare outcome could
> accidentally also take these values, e.g. the number of
> hospitalizations in the past 3 months.
> 
> Is there a safer way to confirm that a variable is binary?
> 
> Thanks for any pointers,
> Bert
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