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Re: st: C-statistic with -gologit2-


From   s.muller@cphc.keele.ac.uk
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: C-statistic with -gologit2-
Date   Wed, 7 Oct 2009 13:29:46 +0100 (BST)

Thanks Jeph, I'll give that a try.
Sara


> I posted some code for getting the C-stat a few days ago
>
> http://www.stata.com/statalist/archive/2009-10/msg00267.html
>
> I'm not familiar with -gologit-, but as long as you can produce
> a predicted probability, the method should apply.
>
> hth,
> Jeph
>
>
> s.muller@cphc.keele.ac.uk wrote:
>> Hi,
>>
>> I have checked the archives and I can't find anything on this topic
>> (sorry
>> if I have missed the answer to my question), but hopefully someone can
>> help me.
>>
>> I have fitted a partial proportional odds model using -gologit2- in
>> Stata
>> 9.2 (3 levels of the outcome, 14 predictors). I used the -autofit-
>> option
>> to assess proportionality and 2 of my predictors have non-proportional
>> odds.
>>
>> Reviewers have suggested the use of a generalized c-statstic to assess
>> the
>> internal validity of the model. I am struggling to work out how I might
>> get the value from Stata.
>>
>> Please could someone give me a pointer in the right direction?
>>
>> Best wishes,
>> Sara
>>
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