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Re: st: Comparing groups


From   Maarten Buis <maartenlbuis@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Comparing groups
Date   Thu, 17 Jan 2013 21:42:14 +0100

On Thu, Jan 17, 2013 at 9:09 PM, MIGUEL ANGEL GRUPO DE INVESTIGACIO
ODONT SIMANCAS PALLARES wrote:
> But, what does mean in the command "logit low ib0.drug", the <ib0.>? I
> couldnt find any variable named in this way.

It is factor variable notation, see -help fvvarlist-

> In other hand, if i request to STATA for "logistic" it would report
> Odds Ratios. If less than 1 i can understand that the treatment effect
> is benefical for the outcome?

Assuming you coded your dependent variable 1 disease, 0 healthy than
yes. I tend to use -logit- together with the -or- option to achieve
the same goal, as that tend to correspond more with the current
general style of Stata commands.

-- Maarten

Ps. the correct spelling of Stata is Stata not STATA, as you could
have read in the Statalist FAQ.

---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany

http://www.maartenbuis.nl
---------------------------------
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