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Re: st: How do I make frequencies for combined variables?


From   Edouard Betsem <edouardbetsem@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How do I make frequencies for combined variables?
Date   Wed, 26 Jun 2013 19:53:38 -0700

Thanks a lot,
This is simple and exactly what I needed
Best
Ed

Edouard BETSEM, MD, PhD


On 26/06/2013 16:09, Nick Cox wrote:
Try -groups- from SSC.

Nick
njcoxstata@gmail.com

On 26 June 2013 21:08, Edouard Betsem <edouardbetsem@gmail.com> wrote:

I am new in Stata and currently working on symptoms combinations for a
specific disease.
There are 12 symptoms that can be found in combinations of 1 to 12 in
different individuals (cases and controls)
I would like to tell how frequent any combination is in disease negative
individuals.
I need to list specifically the symptoms in any combination and the
frequency of that particular combination.

If I consider fever, headache and cough,
i need the frequency of each of them them of combination of two then the
three of them.
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