Table 1.

Sociodemographic characteristics of Brazilian healthy individuals.

Variable	N	Mean	S.D.
Demographic	126
Age, yrs		46.17	±15.43
Years of education		14.07	±4.41
Sex (M/F)	72/54	−	–
Dopamine transporter density
Total striatum DAT-BP		3.25	±0.76
Left striatum DAT-BP		1.23	±0.48
Right striatum DAT-BP		1.13	±0.39

DAT-BP = dopamine transporter binding potential.