Table 1.

Demographic and clinical comparisons between PD subjects included in the analyses vs. those who were not

Variable	PD with MRI N= 158	PD without MRI N=49	p-value
Age, yr	66.8 (9.3)	71.3(8.3)	0.002
Sex, M:F	93/65	30/19	0.087$
Education, yr	11.3 (3.4)	10.0 (2.6)	0.004
ApoE4+, N (%)	56 (37)	12(25.5)	0.14$
PD side, R/L/both	75/63/20	23/17/8	0.732$
H&Y	1.9 (0.6)	2.1 (0.8)	0.169#
UPDRS	22.0 (10.5)	26.3 (12.7)	0.019
MMSE	28.0 (2.1)	26.7 (3.1)	0.005

^#Mann Whitney U test

^$Chi square test