Table 3.

The performance of RF models with three masks in the training, internal test and external test set

Mask type	AUC (95%CI)	Sensitivity	Specificity	Accuracy	Precision	F1 value
Training set
Mask DWI	0.98 (0.95, 1.00)	0.95	0.85	0.91	0.89	0.92
Mask ADC620	0.99 (0.96, 1.00)	0.95	0.88	0.92	0.91	0.93
Mask ADC	0.98 (0.95, 1.00)	0.93	0.94	0.93	0.95	0.94
Internal test set
Mask DWI	0.97 (0.93, 0.99)	0.83	0.97	0.89	0.97	0.90
Mask ADC620	0.98 (0.95, 1.00)	0.86	0.94	0.89	0.95	0.90
Mask ADC	0.97 (0.93, 0.99)	0.90	0.91	0.91	0.93	0.92
External test set
Mask DWI	0.92 (0.85, 0.97)	0.82	0.85	0.84	0.76	0.79
Mask ADC620	0.91 (0.83, 0.98)	0.82	0.81	0.82	0.71	0.76
Mask ADC	0.88 (0.80, 0.96)	0.80	0.78	0.78	0.67	0.73

All variables are expressed as mean.

ADC, apparent diffusion coefficient; AUC, area under the curve; CI, confidence interval; DWI, diffusion-weighted imaging.