Table 1.

Demographic and clinical characteristic of subjects

Age43 ± 6 years
Gender17 males, 1 female
Ethnicity15 African Americans, 3 caucasians
Education13 ± 2 years of education
Years of cocaine use15 ± 7 years
Route of administration18 smoked cocaine
Dose used2.8 ± 1.6 g/d
Days since last cocaine use2 ± 1.4 d (range,1 and 6 d)
Cigarette smokers15 current smokers