Table 4. PD2 binding is higher in PD and De Novo patients versus Control subjects.

Group	PD2 Levels					Groups	PD2 Levels
	N	Mean	s.d.	Min	Max		Mann–Whitney P value
Control	104	0.89	0.68	0.12	3.21
PD	75	1.49	0.92	0.41	6.28	PD versus control	<0.0001
PD+de novo	100	1.73	1.43	0.38	7.11	PD+De novo versus control	<0.0001
De novo	25	2.45	2.26	0.38	7.11	De novo versus control	0.0022

Abbreviation: PD, Parkinson's disease.