Table 4. Regional CBF Differences at Rest between Users and Nonusers.

			MNI
Brain regions	BA	Cluster size (mm3)	X	Y	Z	F-score
Main effect of group
Users >Nonusers
Right pallidum	—	384	20	−4	−2	27.05
Main effect of sex
Males >females
Right insula	13	720	48	2	4	23.05
Females >males
Left posterior cingulate cortex	23	360	−4	−56	16	26.50
Left/right precuneus	7/19	1288	−10	−78	48	25.89
Group × sex interaction
No significant difference

FWE cluster level, corrected p<0.05, voxel threshold at p=0.0002 and K=272 mm³.