Table 1: The number of SPECTs in patients and HC, per SPECT timepoint.

SPECT yearPDAPDHC
DATIBZMDATIBZMDATIBZM

Number of individuals (m/f)029 (18/11)29 (18/11)20 (11/9)18 (11/7)14* (6/8)14* (6/8)
129 (18/11)29 (18/11)20 (13/7)18 (13/5)00
322 (15/7)17 (11/6)10 (7/3)10 (7/3)16 (7/9)16 (7/9)

Mean ± SDMean ± SDMean ± SDMean ± SDMean ± SDMean ± SD

Age at first symptom
Age at SPECT0
1
3

Two HCs were scanned on another camera at baseline SPECT: single photon emission computed tomography; DAT: dopamine transporter imaging with I-FP-Cit; IBZM: D2/D3 dopamine receptor imaging with I-IBZM; APD: atypical parkinsonian disease; PD: Parkinson’s Disease; HC: healthy controls; SD: 1 standard deviation.