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Re: st: An index for determining cut points using ROC


From   Phil Clayton <philclayton@internode.on.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: An index for determining cut points using ROC
Date   Thu, 21 Jun 2012 11:02:16 +0930

There is also another way - you maximise the product of sensitivity and specificity (which maximises the ROC AUC):
Liu X. Classification accuracy and cut point selection. Stat Med. 2012 Feb. 3. 

I have written a program to implement both Youden's and Liu's methods. It's not ready for public release but I'll send it to you privately.

Phil

On 21/06/2012, at 10:43 AM, Alan Acock wrote:

> I have a diagnostic test and want to predict which children will be school ready (0,1) based on the diagnostic test. ROC curves are great for this. There appear to be two indexes. Youdon's index and the point where the ROC curve is closest to 0,1.  Is there a way to compute either or both of these using Stata or a user written command? Findit youdon shows nothing.
> 
> Alan Acock
> 
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