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st: Area under the curve and C-statistics


From   Amal Khanolkar <Amal.Khanolkar@ki.se>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: Area under the curve and C-statistics
Date   Thu, 25 Oct 2012 19:38:49 +0000

Hi,

I've used C statistics before and produced graphs that depict area under the curve for logistic regression models.

Is it possible to do the same for multinomial logistics regression models?

I tried running:

 mlogit moth_wtgainbybmi i.mom_race2 age_mom sexx, base(1) rrr, if parity!=. & gestwk_cat!=. & cigs_befx!=. & cigs_1stx!=. & cigs_2ndx!=. & cigs_3rdx!=. & gestdb!=. & gesthy!=. & ht_cm!=. & plural==1 & edu_mom!=. & marriedxx!=.


lroc

I get the error message 'last estimates not found...'.

I assume that 'lroc' is suitable after using the 'logistic' command.

Is there an equivalent for 'lroc' and 'roccomp' for multinomial logistic regression?

Thanks,

/Amal.


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