Table 5.

Multiple Linear Regression Analyses of Anterior Frontal Lobe ROI’s Age-related change in D2-like receptor availability (BP_ND) using [¹⁸F]Fallypride PET in Study 2.

Model	Parameter	Anterior orbital gyrus	Cingulate gyrus, anterior	Inferior frontal gyrus	Lateral orbital gyrus	Middle frontal gyrus	Superior frontal gyrus
	N	129	130	128	125	124	121
Baseline	R2	0.354***	0.48***	0.488***	0.284***	0.394***	0.683***
Linear	Age	−0.0063 [ −0.0093, −0.0034 ]	−0.0037 [ −0.0056, −0.0018 ]	−0.0059 [ −0.0085, −0.0033 ]	−0.0082 [ −0.011, −0.005 ]	−0.0068 [ −0.0095, −0.0042 ]	−0.0033 [ −0.0053, −0.0013 ]
	R2 change	0.079***	0.052***	0.071***	0.122***	0.109***	0.027**
Quadratic	Age	−0.035 [ −0.053, −0.018 ]	−0.014 [ −0.026, −0.003 ]	−0.035 [ −0.05, −0.02 ]	−0.038 [ −0.056, −0.019 ]	−0.034 [ −0.049, −0.019 ]	−0.023 [ −0.034, −0.012 ]
	Age2	0.00031 [ 0.00012, 0.00049 ]	0.00011 [ −5.9e−06, 0.00023 ]	0.00031 [ 0.00015, 0.00046 ]	0.00031 [ 0.00012, 5e-04 ]	0.00028 [ 0.00013, 0.00044 ]	0.00021 [ 8.9e−05, 0.00032 ]
	R2 change	0.045**	0.013	0.049***	0.046**	0.048***	0.027***

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.