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Re: st: Confidence interval for area under the ROC curve


From   "Svend Juul" <SJ@SOCI.AU.DK>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Confidence interval for area under the ROC curve
Date   Tue, 3 Oct 2006 14:35:12 +0200

Sama wrote:

Thanks. This is quite helpful. I just have one question. Why did you use
the
command
   replace bwt=-bwt
---------------------------------------------------------------------

Well, smoking is associated with LOW birthweight, but I wanted to see an
ROC curve with an area > 0.5. Rather that inverting -bwt-, I could let
bwt "predict" nonsmoking:
  gen nonsmoke=1-smoke
and use -nonsmoke- as the dependent variable.

Svend


__________________________________________

Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000  Aarhus C, Denmark
Phone: +45 8942 6090
Home:  +45 8693 7796
Email: sj@soci.au.dk
__________________________________________ 

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