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st: comparing AUC for Cox model - re-worded: Harrell's C


From   Ricardo Ovaldia <[email protected]>
To   [email protected]
Subject   st: comparing AUC for Cox model - re-worded: Harrell's C
Date   Mon, 13 Feb 2006 06:03:23 -0800 (PST)

Dear all,

I previously wrote:
 
> I know that I can use -estat concordance- to compute
> the area under the curve (AUC)(from a Cox model). Is
there a way to
> compare two AUC? Perhaps someway of using -roccomp-.

Because  -estat concordance- after -stcox- computes
Harrell's C as an estimate of the AUC, is there a way
to test if the null that two independent Harrell's C
statistics are equal?

Thank you,
Ricardo. 


Ricardo Ovaldia, MS
Statistician 
Oklahoma City, OK

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