Table 2.

Partial correlation coefficients of the mean susceptibility (χ) and R2* with age and disease duration.

Map	Deep brain region	Correlation coefficient – left side		Correlation coefficient – right side
		Age	Disease duration	Age	Disease duration
χ	Caudate	0.66	0.13	0.67	0.15
	Putamen	0.55	0.37	0.46	0.33
	Pallidum	0.79	0.40	0.78	0.43
	Thalamus	0.12	0.40	0.12	0.40
	Substantia nigra	0.65	0.34	0.67	0.20
	STN	0.40	0.13	0.53	0.11
	Red nucleus	0.37	0.21	0.50	0.31
	Cerebellar dentate	0.29	0.16	0.28	0.17
R2*	Caudate	0.60	0.25	0.61	0.23
	Putamen	0.37	0.17	0.36	0.15
	Pallidum	0.64	0.32	0.65	0.30
	Thalamus	0.33	0.13	0.34	0.10
	Substantia nigra	0.26	0.14	0.27	0.12
	STN	0.33	0.16	0.32	0.18
	Red nucleus	0.22	0.11	0.23	0.09
	Cerebellar dentate	0.36	0.10	0.37	0.15

The correlation coefficients were estimated separately for each deep brain structure and each brain side for the whole group of patients. STN = sub-thalamic nucleus.