Dear useRs:

I use pROC package to compute the bootstrap C.I. of AUC.

The command was as follows:

roc1<-roc(all$D,all$pre,ci=TRUE,boot.n=200)

However, the result was:

Area under the curve: 0.5903
95% CI: 0.479-0.7016 (DeLong)

Why the C.I. was computed by the Delong Method?


Yao Zhu
Department of Urology
Fudan University Shanghai Cancer Center
Shanghai, China

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