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Figure 3 | Radiation Oncology

Figure 3

From: Carcinoembryonic antigen (CEA) level, CEA ratio, and treatment outcome of rectal cancer patients receiving pre-operative chemoradiation and surgery

Figure 3

Receiver operating characteristic curves of various CEA parameters relative to pathologic complete response. (A) For all patients (n = 138), the area under the curves (AUCs) were 0.575 (p = 0.243), 0.691 (p = 0.003) and 0.508 (p = 0.894) for pre-CRT CEA, post-CRT CEA and CEA ratio, respectively. (B) For those with pre-CRT CEA <6 ng/ml (n = 87), the AUCs were 0.617 (p = 0.135), 0.644 (p = 0.066) and 0.501 (p = 0.991) for pre-CRT CEA, post-CRT CEA and CEA ratio, respectively. (C) For those with pre-CRT CEA ≥6 ng/ml (n = 51), the AUCs were 0.459 (p = 0.717), 0.783 (p = 0.012) and 0.733 (p = 0.038) for pre-CRT CEA, post-CRT CEA and CEA ratio, respectively.

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