Table 4.
Regions of interest (ROIs) that show differences in GM volume between the impulse control disorder (ICD)+ and ICD− groups, and ROIs showing associations between GM volume and behavioral measures [i.e., number of draw choices in the beads task and scores on the Barratt Impulsiveness Scale (BIS) questionnaire].
| Contrast | Anatomic location | Coordinates of peak | Cluster size | Z-score |
|---|---|---|---|---|
| Group difference | R GPe | 21, −3, 0 | 32 | 2.79 |
| Association of GM volume and draw choices (−) | R putamena L putamena |
33, 2, −3 −35, −4, 0 |
69 46 |
3.79 3.73 |
| Association of GM volume and BIS score (+) | R putamen R putamen |
29, −12, 10 33, −12, −5 |
18 23 |
2.88 2.85 |
Note that the association with the number of draw choices was negative, whereas the association with BIS scores was positive.
GM, gray matter; GPe, external portion of the globus pallidus.
aRemained significant at FWE-corrected p < 0.0.5.