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	R2	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 ]
	R2 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 ]
	R2 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.