Table 2.

Demographic and drug use variables.

Total sample	11
Gender	9 Males, 2 females
Age	39±8.6 years
Ethnicity	11 African American
Cocaine use information:
Preferred drug	54% crack, 46% powder
Age of first cocaine use	20.9 (±3.3) years
Duration of cocaine use	17.2 (±2.7) years
Amount Spent per week	$168.18 (±120)
Time since last use (at scan)	2.4 (±1.06) days
Other drug use:
Nicotine smokers	11
Nicotine severity (Fagerstrom)	3.1 (±2.4)
Marijuana smokers	2 of 11
Positive UDS marijuana	1 of 11
Alcohol use (AUDIT)	7.8 (±5.8)
Depressive symptoms (BDI)	7.72 (±6.8)
Anxiety state (Spielberger)	37.45 (±14.0)
Anxiety trait	39.2 (±11.4)