Table 5: PD and APD patients with SPECT: clinical laterality versus DAT uptake in putamen and clinical subtype at baseline. The ratio between left and right DAT SPECT uptake in putamen at baseline.
(a)

Clinical laterality at baseline
No reported lateralityLeftRightSymmetricalTotal

Side with lowest DAT uptake in putamen
 Right11131126
 Left5010823
 Total6 11 13 19 49
Parkinsonism type
 PIGD6561532
 Tremor016310
 Indeterminate05117
 Total6 11 13 19 49

PIGD: postural instability and gait difficulty and 95% CI: 95% confidence interval.
(b)

Parkinsonism motor subtypen Mean left/right ratio95% CI

PIGD321.000.95–1.05
Tremor100.930.82–1.03
Indeterminate71.150.99–1.30
Total49 1.01 0.96–1.05

PIGD: postural instability and gait difficulty and 95% CI: 95% confidence interval.