Table 2. Structural volumes.

Volumes (cm3)	Patients	Controls	P and F values
L caudate volume	3.8±0.5	4.6±0.6	p<0.0001 F = 26.8
R caudate volume	3.8±0.5	4.5±0.6	p<0.001 F = 11.7
L putamen volume	3.8±0.5	4.6±0.7	p<0.0001 F = 23.4
R putamen volume	3.8±0.4	4.7±0.6	p<0.0001 F = 25.8
L hippocampus volume	3.0±0.4	3.0±0.4	p = 0.312 F = 1.054
R hippocampus volume	3.0±0.4	3,0±0.5	p = 0.493 F = 0.483
GM volume	690.3±57.9	699.2±66.4	p = 0.208 F = 1.608
WM volume	458.9±50.4	457.5±48.4	p = 0.88 F = 1.148
CSF volume	338.4±100.9	457.5±48.4	p = 0.86 F = 0.033
TIV volume	1487.6±163.3	1490.5±151.3	p = 0.57 F = 0.331

TIV  =  total intracranial volume.

P-values for structural volumes were based on calculations of ratios between the respective structural volume and the TIV.