Table 2.

Levodopa-induced mean percent change (SD) in blood flow in hypothesis testing data sets

	% Change	t Value	P value
Left putamen	4.6 (10.3)	3.33	0.001*
Midbrain	8.7 (13.1)	4.88	<0.001*
Right amygdala	4.6 (13.2)	2.56	<0.01*
Left thalamus	18.9 (18.2)	2.76	0.017†
Left hippocampus	10.5 (9.8)	3.03	<0.01†

^*Regions generated and tested in subjects without DID. 

^†Regions generated and tested in PD patients with DID.