Table 1.

Demographics of cocaine dependent (CD) and healthy control (HC) subjects.

Subject characteristic	CD (n = 75)	HC (n = 88)	p-Value
Age (years)	39.9 ± 7.6	38.7 ± 10.9	0.43a
Gender (M/F)	50/25	49/39	0.15b
Beck Depression Inventory (BDI)	12.2 ± 9.2	N/A	N/A
STAI State	37.6 ± 11.0	N/A	N/A
STAI Trait	41.7 ± 11.7	N/A	N/A
CCQ-Brief	20.8 ± 8.3	N/A	N/A
Current smoker (yes/no)	59/16	31/57	1e − 12b
Years of alcohol use	16.1 ± 9.3	14.9 ± 14.3	0.57a
Days of drinking (prior month)	12.7 ± 7.5	3.4 ± 5.3	1e − 16a
Years of marijuana use	10.0 ± 4.1	N/A	N/A
Average monthly cocaine use (gm), prior year	18.8 ± 27.3	N/A	N/A
Days of cocaine use (prior month)	15.3 ± 8.7	N/A	N/A
Years of cocaine use	18.0 ± 8.2	N/A	N/A
Days abstinent prior to assessment	18.0 ± 5.9	N/A	N/A

Note: values are mean ± S.D.

^aTwo-tailed two-sample t-test.

^bχ² test.