Table 3.

Histogram analysis of the putamen SBR. Mean values M₁, M₂ and standard deviations SD₁, SD₂ from the fit of the histogram of the putamen SBR (n = 1740) by the sum of two Gaussians according to Eq. (1), effect size d of the distance between the two Gaussian functions according to Eq. (2), and cutoff c for the dichotomization of SBR as normal or reduced according to Eq. (3). The results are given separately for with and without ASC

	Reduced		Normal		Effect size	Cutoff
	M1	SD1	M2	SD2	d	c
Without ASC	0.389	0.135	1.264	0.300	3.760	0.661
With ASC	0.579	0.157	1.577	0.320	3.958	0.907