TABLE 2.

AUC of logistic regression model

	M1	M2	M2+I	M3	M3+I
Bladder	0.557	0.598	0.535	0.597	0.618
Prostate	0.782	0.774	0.779	0.654	0.381
Rectum	0.709	0.792	0.702	0.791	0.534

M1 is a model that includes the C parameter only.

M2 includes both C and surface DSC.

M3 includes all covariates of C, surface DSC, and Hausdorff distance.

We used “+I” to mark the model with interaction terms.