Pre- and Postsynaptic Dopamine SPECT in Idiopathic Parkinsonian Diseases: A Follow-Up Study

Table 2

The clinical follow-up time of the patients that underwent DAT SPECT and/or IBZM SPECT at each time-point, per diagnosis.

SPECT year	Diagnosis	n	Follow-up time, years
			Mean ± SD
0	PD	29	4.2±1.1
	MSA	7	3.7±1.4
	PSP	13	3.7±1.4
	HC	16	5.0±0.0
1	PD	29	4.2±1.1
	MSA	8	4.1±0.9
	PSP	12	4.2±1.0
3	PD	23	4.3±1.0
	MSA	7	4.9±1.6
	PSP	5	5.1±0.7
	HC	16	5.0±0.0

MSA: multiple system atrophy, PSP: progressive supranuclear palsy; PD: Parkinson’s disease. SPECT year 0: baseline, 1: 1 year followup, 3: 3 years followup, and SD: 1 standard deviation.