Table 3. Comparison of diagnostic performance between 2D fractal model and 3D fractal model for predicting the meningioma grade.

Models	AUC (95% CI)	Accuracy (%)	Sensitivity (%)	Specificity (%)	p value*
2D fractal model	0.690 (0.581–0.799)	72.4	75.8	64.4	Reference
3D fractal model	0.813 (0.733–0.878)	82.9	81.8	70.0	<0.001

^*p-value refers to the significance among the differences of the AUCs between the 2D fractal and 3D fractal models. AUC, area under the curve; CI, confidence interval; 2D, two-dimensional; 3D, three-dimensional