Table 3.

Diagnostic Performances of the Radiomic Model and Radiologists’ Visual Interpretation in the Independent Test Cohort of 3 Centers

Variable	AUC (95% CI)	Accuracy	Sensitivity	Specificity	P valuea
Center 1b (n = 61c)
Radiomic model	0.816 (0.706–0.926)	0.754	0.818	0.679	<.001
Visual Interpretation
Radiologist 1	0.558 (0.413–0.703)	0.574	0.515	0.643	.628
Radiologist 2	0.536 (0.390–0.683)	0.590	0.606	0.571	.439
Center 2d (n = 32c)
Radiomic model	0.724 (0.526–0.923)	0.906	1.000	0	.027
Visual Interpretation
Radiologist 1	0.546 (0.361–0.722)	0.719	0.759	0.333	.834
Radiologist 2	0.511 (0.329–0.691)	0.375	0.345	0.667	.962
Center 3e (n = 21c)
Radiomic model	0.750 (0.560–0.940)	0.857	0.900	0	.409
Visual Interpretation
Radiologist 1	0.650 (0.441–0.859)	0.381	0.350	1.000	.620
Radiologist 2	0.525 (0.194–0.856)	0.333	0.300	1.000	.934

NOTE. Accuracy, sensitivity, and specificity of the radiomic model in 3 centers were calculated with the cut-off value of 0.811, which maximizes the Youden index in the training cohort.

CI, confidence interval.

^aP value is the significance level of comparison of AUC with that of random case (AUC = 0.5).

^bThe First Affiliated Hospital of Sun Yat-Sen University.

^cNumber of involving bowel segments.

^dThe Sixth Affiliated Hospital of Sun Yat-Sen University.

^eNanfang Hospital of Southern Medical University.