Table 2.

Tissue segmentation in striatal subregions

	OCD (n=15)	Healthy control (n=16)	95% CI for difference in means
Tissue composition	Mean percent (SD)	Mean percent (SD)
Dorsal caudate
CSF	6.04 (4.28)	6.36 (5.77)	−3.43, 4.08
Gray matter	62.24 (7.39)	63.99 (5.83)	−3.12, 6.62
White matter	31.70 (9.95)	29.63 (8.62)	−8.91, 4.75
Dorsal putamen
CSF	0.05 (0.05)	0.15 (0.33)	−0.08, 0.28
Gray matter	62.74 (6.35)	61.84 (5.96)	−5.42, 3.63
White matter	37.20 (6.34)	38.01 (6.02)	−3.74, 5.34
Ventral striatum
CSF	0.03 (0.04)	0.07 (0.15)	−0.04, 0.12
Gray matter	42.67 (8.29)	42.91 (6.47)	−5.20, 5.68
White matter	57.30 (8.29)	57.02 (6.49)	−5.72, 5.18

Abbreviations: CI, confidence interval; CSF, cerebral spinal fluid; OCD, obsessive-compulsive disorder; SD, standard deviation