Table 5:

¹²³I-FP-CIT SBRs according to the nigral hyperintensity status on SMWI

	Present	Lost	P Value
All patients
Striatum	3.51 ± 1.15	2.03 ± 0.61	< .001^a
Caudate nucleus	4.01 ± 1.20	2.63 ± 0.92	< .001^a
Putamen	3.25 ± 1.21	1.76 ± 0.55	< .001^a
Patients with PD
Striatum	3.08 ± 0.89	2.04 ± 0.62	< .001^a
Caudate nucleus	3.84 ± 1.09	2.64 ± 0.94	< .001^a
Putamen	2.73 ± 0.89	1.77 ± 0.56	< .001^a
Control participants
Striatum	4.22 ± 1.88	1.88 ± 0.16	< .001^a
Caudate nucleus	4.50 ± 1.27	2.48 ± 0.35	< .001^a
Putamen	4.12 ± 1.20	1.60 ± 0.23	< .001^a
Per-patient basis analysis of the averaged SBRs among patients with PD	Bilateral intact nigral hyperintensity (n = 36)	Unilateral or bilateral loss of nigral hyperintensity (n = 73)	P Value
Striatum	3.16 ± 0.90	2.13 ± 0.63	< .001^a
Caudate nucleus	3.89 ± 1.10	2.76 ± 0.95	< .001^a
Putamen	2.81 ± 0.88	1.84 ± 0.55	< .001^a