R help - Mar 2011 - C-statistics (AUCs) from rcorr.cens or survcomp time-dependent ROC curves

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. Are they expected to be the same ?
Many thanks in advance


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