. Author manuscript; available in PMC: 2010 May 31.

Published in final edited form as: Psychopharmacology (Berl). 2008 Jan 29;198(4):587–603. doi: 10.1007/s00213-007-1042-2

Table 2.

Demographics

		Mean (SD)
Total (n=28)	Healthy subjects	17
	Frequent users	11
Age (SD) years		24.89 (±6.98)
National Adult Reading Test (NART) IQ		113 (±7.3)
Years of education	All	15.78 (±1.9)^**
	Healthy subjects	16.35 (±2.23)
	Frequent users	14.91 (±0.94)
Race	Caucasian	19
	Native American	0
	African American	3
	Hispanic	2
	Asian	4
Weight		159.35 (±28.59)

^**

t test; p=0.054