North, Bernard V
2011-Jun-21 09:42 UTC
[R] relation between tdrocc AUC and c-statistic from rcorr.cens
I am using the rcorr.cens function from the Hmisc package and the time-dependent ROC curve obtained using tdrocc in the survcomp package. I understand that the C statistic from rcorr.cens has to be subtracted from 1 if high values of the risk variable lower survival. Given that I wonder what the connection is between that C statistic and the AUC from the tdrocc object. If they are substantially different are there any views on which one is to be preferred ? Many thanks in advance [[alternative HTML version deleted]]