[R] Differences between ROC curves

[Karl Knoblick]

Hallo!

Can anybody help with the comparison of ROC curves? I want to compare two 
uncorrelated ROC curves, i.e. the data sets of the two ROC curves are from 
different samples. 


One way to compare ROC curves seems to be the comparison of the AUCs. Although I 
found the package pROC with he comparison of correlated ROC curves, I did not 
find anything about the comparison of uncorrelated ROC curves.

Does anybody know how to compare the AUC of wo uncorrelated ROC curves?

(Why do I want to do this? I have two samples an older and a newer one.The 
question is, if the diagnostic test (AUC of ROC curve) is better in either the 
older or newer sample or if they are equal.)


Thanks for any help!
Karl