Figure 3. Receiver operating characteristic (ROC) curves for distinguishing colorectal cancer (CRC) patients from healthy controls. (A) ROC curves for all CRC patients and healthy controls. (B) ROC curves for stage I CRC patients and healthy controls. (C) ROC curves for stage II CRC patients and healthy controls, (D) ROC curves for stage III CRC patients and healthy controls. (E) ROC curves for stage IV CRC patients and healthy controls.