. 2014 Jul 4;27(6):824–832. doi: 10.1007/s10278-014-9707-y

Table 5.

Second-order with interactions model from method 1

	Features	Coefficient	P value	VIF
Second-order interaction	Effective_Z SD	9.871	0.001	1.35
R ² = 0.79	100 keV meanmax^a × 140 keV meanmax	−0.001608	0.03	8.43
R ² (adjusted) = 0.75	140 keV meanmax × effective_Z meanmax	−0.12867	0.003	9.59
R ² (adjusted) = 0.75	Composite^b	0.7510	<0.001	6.27

VIF, variance inflation factor

^aThe term “meanmax” refers to the mean of the maxima of the three regions of interest (ROIs) drawn. The term “maxmax” refers to the highest of the maxima of the three ROIs drawn (i.e., the highest pixel value among the three ROIs)

^bComposite = −0.1432981 × 90keV_maxmax + 0.2718076 × 100keV_meanmax + 17.3583 × effective_Z_meanmax −0.458754 × calcium_NaUrate_meanmax −1.167255 × effective_Z_standard deviation × 90 keV_maxmax + 2.309526 × effective_Z_standard deviation × 100keV_meanmax