Dear Statalist,
My apologies if this is double-posted; I haven't yet seen this message
appear on the list.
I am working on a diagnostic test for an infectious disease. I am
assessing optimal cut off points within the continuous measure (which
is strongly skewed) using ROC curves, but am unclear as to whether or
not one must smooth the ROC curve prior to selecting cut off points
(my sample size is approximately 800 with 118 events, not sure if this
is important). Also, I am pretty new to Stata and am not sure how I
would go about doing this (I think this would involve log transforming
the measure and using rocfit, but beyond that I am uncertain).
Thanks for any advice you might have.
Best,
John
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
