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 yearDiagnosisn Follow-up time, years
Mean ± SD

0PD29
MSA7
PSP13
HC16

1PD29
MSA8
PSP12

3PD23
MSA7
PSP5
HC16

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.