Table 2.

Two-stage regression of the processing speed vs. two diffusion factors (step 1) and diagnosis (step 2)

Regression step	DWI factor β ± SE (P value)	DTI factor β ± SE (P value)	DX β ± SE (P value)	r2, F (P value)
First step	4.2 ± 1.0 (1⋅10−4)	5.9 ± 1.1 (3⋅10−7)		0.25, 24.6 (6⋅10−10)
Second step	3.2 ± 1.1 (0.001)	5.0 ± 1.1 (2⋅10−5)	−5.8 ± 2.5 (0.04)	0.27, 19.0 (2⋅10−10)

Regression was performed in the sample of patients and controls. DX, diagnosis.