TABLE 3

Correlation Coefficients for SPECT Measures and Symptom Ratings in PD Patients

Measure	Total PD patients					Drug-naive PD patients
Measure		R_PE	R_A	R_V	R_PE	R_A	R_V
Striatal V₃″	0.137	0.120	−0.008	−0.126	0.226	0.167
P	0.696	0.733	0.982	0.857	0.745	0.812
Hoehn-Yahr stage	−0.015	−0.210	−0.137	0.265	−0.023	−0.086
P	0.921	0.547	0.697	0.213	0.974	0.902
Total UPDRS	−0.083	−0.397	−0.226	0.114	−0.391	−0.273
P	0.591	0.235	0.515	0.600	0.559	0.692
Motor UPDRS	−0.047	−0.341	−0.203	0.191	−0.266	−0.154
P	0.761	0.316	0.560	0.375	0.700	0.826
ADL UPDRS	−0.183	−0.411	−0.307	−0.193	−0.398	−0.365
P	0.231	0.211	0.369	0.371	0.542	0.571
Mentation, behavior, and mood UPDRS	−0.011	−0.090	0.069	0.234	−0.131	−0.052
P	0.942	0.799	0.846	0.273	0.852	0.941