Table 5.

Comparison of AUC between ACR-TIRADS, K-TIRADS, and C-TIRADS.

	AUC difference	95% CI	Z value	P-value
All Nodules
C-TIRADS VS. ACR-TIRADS	0.060	0.000–0.117	2.078	0.038
C-TIRADS VS. K-TIRADS	0.075	0.022–0.128	2.769	0.006
ACR-TIRADS VS.K -TIRADS	0.015	-0.037–0.066	0.548	0.583
Nodules ≤1 cm
C-TIRADS VS. ACR-TIRADS	0.072	−0.009–0.152	1.752	0.080
C-TIRADS VS. K-TIRADS	0.077	−0.002–0.152	2.025	0.043
ACR-TIRADS VS. K-TIRADS	0.005	−0.069–0.080	0.143	0.886
Nodules >1 cm
C-TIRADS VS. ACR-TIRADS	0.058	−0.021–0.138	1.443	0.149
C-TIRADS VS. K-TIRADS	0.088	0.010–0.165	2.209	0.027
ACR-TIRADS VS. K-TIRADS	0.029	−0.053–0.112	0.695	0.487