Table 3. Regional 18F-FP-CIT uptake among study subjects (mean±standard deviation).

Compared to patients with IPD, controls displayed a higher uptake in all of the basal ganglia areas, lower asymmetry indices and caudate/putamen ratios.

^*Statistical difference occurred more frequently with advancing H-Y stages, ^†Statistical difference was found among each H-Y stage (H-Y2 > H-Y1 > H-Y≥3), ^‡Statistical difference was found between H-Y stage 1, 2 and H-Y stage≥3, ^§Statistical difference was found between H-Y stage 2 and H-Y stage 1, H-Y stage≥3.

AP: anterior putamen, CN: caudate nucleus, H-Y: Hoehn-Yahr, PET: positron emission tomography, PP: posterior putamen.