Table 2.

Dopamine transporter availability between subgroups of PD patients and healthy controls, respectively

	PD-CC (n = 88)	PD-FC (n = 18)	PD-NC (n = 32)	p values	HC-CC (n = 55)	HC-FC (n = 9)	HC-NC (n = 11)	p values
Caudate	1.95 ± 0.48	2.28 ± 0.63	2.19 ± 0.41	0.008**	2.99 ± 0.59	3.52 ± 0.69	3.34 ± 0.80	0.031*
Putamen	0.79 ± 0.27	0.84 ± 0.27	0.87 ± 0.22	0.317	2.17 ± 0.55	2.34 ± 0.51	2.59 ± 0.72	0.075

Bold values indicate significant differences

PD-CC current consumers of Parkinson’s disease, PD-FC former consumers of Parkinson’s Disease, PD-NC never consumers of Parkinson’s Disease, HC-CC current consumers of healthy controls, HC-FC former consumers of healthy controls, HC-NC never consumers of healthy controls

^*Bonferroni uncorrected (p < 0.05)

^**Bonferroni corrected (p < 0.05/4 = 0.0125)