Table 3.

Multiple linear regression analyses of basal ganglia ROI's age‐related change in D2‐like receptor availability (BP_ND) using [¹⁸F]Fallypride PET

Model	Parameter	Caudate nucleus	Pallidum	Putamen	Thalamus	Ventral striatum
	N	130	129	129	127	129
Baseline	R 2	0.055*	0.151***	−0.007	0.02	0.124***
Linear	Age	−0.15 [−0.2, −0.11]	−0.022 [−0.055, 0.011]	−0.13 [−0.18, −0.088]	−0.0071 [−0.011, −0.0033]	−0.1 [−0.18, −0.027]
	R 2 change	0.248***	0.011	0.212***	0.097***	0.047**
Quadratic	Age	−0.41 [−0.68, −0.14]	0.038 [−0.16, 0.24]	−0.53 [−0.79, −0.27]	−0.014 [−0.036, 0.0091]	−0.31 [−0.77, 0.15]
	Age2	0.0027 [−6.9e−05, 0.0055]	−0.00063 [−0.0027, 0.0014]	0.0042 [0.0014, 0.0069]	6.8e−05 [−1.7e−04, 3e−04]	0.0022 [−0.0026, 0.0069]
	R 2 change	0.02	0.002	0.053**	0.002	0.005

Notes. Significant effects are denoted in bold. Full regression tables can be found in the online application http://13.58.222.229:3838/agebp/.

*p < .05. **p < .01. ***p < .001.