TABLE 1.

Mean Regional Tissue Correction Factors and Pearson Correlation Coefficients for Comparison of Age Versus Tissue Correction Factor

Region	Group		r
Region	Young/midlife (M ± SD)	Elderly (M ± SD)	r
Anterior cingulate	0.95 ± 0.04	0.86 ± 0.04*	0.77
Medial orbito-frontal	0.87 ± 0.06	0.83 ± 0.05†	0.40
Mesial temporal	0.93 ± 0.02	0.88 ± 0.05*	0.66
Lateral temporal	0.86 ± 0.02	0.76 ± 0.06*	0.80
Parietal	0.92 ± 0.02	0.81 ± 0.07*	0.79
Sensorimotor	0.90 ± 0.03	0.77 ± 0.07*	0.85
Occipital	0.94 ± 0.02	0.82 ± 0.07*	0.80
Lateral orbitofrontal	0.85 ± 0.04	0.78 ± 0.05*	0.70
Cortical ROIs (M ± SD)	0.90 ± 0.02	0.81 ± 0.06*	0.84
Thalamus	0.96 ± 0.01	0.91 ± 0.03*	0.79
Basal ganglia	0.95 ± 0.02	0.93 ± 0.01*	0.55
Cerebellum	0.94 ± 0.03	0.89 ± 0.04*	0.67

↵* P ≤ 0.01.
↵† P ≤ 0.10.