Table 2:

Comparison of MD and FA in patients and control subjects^a

	HC	PD	PDD	HC > PD	HC > PDD	PD > PDD
Anterior CFTs
FA	0.441 ± 0.035^a	0.399 ± 0.028	0.399 ± 0.031	P = .003^b	P = .003^b	P = .90
MD^c	0.758 ± 0.025	0.789 ± 0.034	0.775 ± 0.031	P = .031	P = .33	P = .47
Posterior CFTs
FA	0.519 ± 0.038	0.489 ± 0.040	0.477 ± 0.040	P = .09	P = .015^b	P = .72
MD	0.755 ± 0.046	0.759 ± 0.022	0.770 ± 0.027	P = .94	P = .32	P = .51
Corticospinal tract
FA	0.655 ± 0.020	0.651 ± 0.022	0.651 ± 0.024	P = .89	P = .87	P = .99
MD^c	0.751 ± 0.026	0.775 ± 0.025	0.756 ± 0.031	P = .077	P = .92	P = .17