ROC AUC using different methods and different ROC curves.

ROC AUC and standard errors calculated for five readers using CT colonography without CAD.The Wilcoxon method is equivalent to the Wilcoxon statistic, an empirical method not requiring a ROC curve to be fitted. DBM and PROPROC methods sometimes give different ROC AUC because different ROC curves are fitted as seen in figure 5 for Readers 2 and 5. NC = could not be calculated with DBM MRMC software.ROC AUC using different methods and different ROC curves.