Table 3. Caudate Nucleus and Cognitive Associations for Total Sample (n=80) by Transformation (native,6,9,12).

	UPDRS Pt. 3	DRS-2	PSI	TMT B z	BNT z	Vocab z
Total (n=80):
Native	−0.11, p=0.33	0.07, p=0.53	0.18, p=0.10	0.17, p=0.13	0.00, p=0.99	0.03, p=0.79
6 DOF	−0.11, p=0.33	0.07, p=0.52	0.19, p=0.10	0.17, p=0.13	0.00, p=0.99	0.03, p=0.80
9 DOF	−0.31, p<0.01 *	0.16, p=0.17	0.32, p<0.01 *	0.21, p=0.06+	−0.01, p=0.97	−0.02, p=0.89
12 DOF	−0.30, p<0.01 *	0.15, p=0.18	0.32, p<0.01 *	0.22, p=0.06+	−0.00, p=0.98	−0.02, p=0.92

UPDRS III = Unified Parkinson’s Disease Rating Scale – Part III; DRS-2 = Dementia Rating Scale Second Edition standardized z-score; TMT B z = Trail Making Test standardized z-score; BNT z = Boston Naming Test standardized z score; Vocab z= WASI Vocabulary subtest standardized z score; Note: Correlations reflect the total caudate nucleus volume as a proportion to total intracranial volume (TICV).

^*Significant correlations at (p<.01, two-tailed);

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