TABLE 2.

Relationship between nonlateralized motor scores and mean bilateral DAT SBR

Coefficient (SE), P‐value	Whole cohort MDS‐UPDRS, Part 3, total	MDS‐UPDRS, Part 3, total DD ≤ 4 years	MDS‐UPDRS, Part 3, total DD > 4 years	Whole cohort PIGD	PIGD DD ≤4 years	PIGD DD > 4 years
Overall striatum	−4.53 (3.13), 0.1504	−0.72 (4.34), 0.8692	−1.56 (5.23), 0.7663	−2.04 (0.61), 0.0010	−1.18 (0.73), 0.1125	−1.31 (1.02), 0.2048
Posterior putamen	−5.10 (5.32), 0.3391	2.74 (6.85), 0.6901	−4.60 (9.11), 0.6153	−3.05 (1.04), 0.0039	−1.57 (1.16), 0.1812	−2.63 (1.77), 0.1421
Anterior putamen	−5.87 (3.27), 0.0751	−1.80 (4.51), 0.6922	−3.85 (5.52), 0.4872	−2.27 (0.63), 0.0005	−1.48 (0.75), 0.0545	−1.61 (1.08), 0.1380
Caudate	−2.31 (2.08), 0.2673	−0.22 (2.93), 0.9400	0.38 (3.31), 0.9094	−1.18 (0.40), 0.0041	−0.59 (0.50), 0.2390	−0.58 (0.65), 0.3764

Note: Bold indicates significant values.

Abbreviations: DAT SBR, dopamine transporter striatal binding ratio; SE, standard error; MDS‐UPDRS, Movement Disorder Society Unified Parkinson's Disease Rating Scale; DD, disease duration since diagnosis; PIGD, Posture, Postural Instability and Gait.