Table 6.

Multiple linear regression analyses of posterior frontal and parietal lobe ROI's age‐related change in D2‐like receptor availability (BP_ND) using [¹⁸F]Fallypride PET in Study 2

Model	Parameter	Cingulate gyrus, posterior	Precentral gyrus	Postcentral gyrus	Superior parietal gyrus	Inferiolateral remainder of parietal lobe
	N	125	107	110	113	128
Baseline	R 2	0.224***	0.494***	0.465***	0.403***	0.31***
Linear	Age	−0.0046 [−0.0069, −0.0022]	−0.0024 [−0.0046, −2e−04]	−0.0062 [−0.0093, −0.0032]	−0.0032 [−0.006, −0.00031]	−0.0073 [−0.011, −0.0038]
	R 2 change	0.081***	0.022*	0.072***	0.025*	0.083***
Quadratic	Age	−0.014 [−0.029, −0.00015]	−0.0096 [−0.022, 0.0031]	−0.035 [−0.052, −0.017]	−0.021 [−0.038, −0.0043]	−0.044 [−0.064, −0.025]
	Age2	1e−04 [−4.5e−05, 0.00025]	7.6e−05 [−5.6e−05, 0.00021]	3e−04 [0.00011, 0.00048]	0.00019 [1.4e−05, 0.00036]	0.00039 [0.00019, 0.00059]
	R 2 change	0.011	0.006	0.04**	0.023*	0.062***

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.