Table 1.

Demographic and Substance Use Information for Cocaine Users and Controls

	Cocaine (n=20)Mean, range (SD)	Control (n=17)Mean, range (SD)	t-Stats	p
Age (years)	46 (6.4)	46 (7)	0.10	0.92
Education (years)	13.4 (2.4)	13.5 (2.1)	−0.17	0.86
Race/ethnicity
Caucasian	7	5
African American	11	11
Hispanic	2	1
Female (n)	5	4
Cocaine use by all users
Frequency (days/week)	3, 2–6 (1.2)	na
Duration of use (years)	16, 3–34 (8)	na
Money spent ($/week)	$220, $70–550 (131)	na
Cocaine use by noncocaine-dependent/abusers
Frequency (days/week)	3, 2–6 (1.5)
Duration of use (years)	9, 3–19 (6)
Money spent ($/week)	$172, $80–350 (93)
Alcohol use
Frequency (days/month)	1.9, 1–2.5 (0.55)	4.0, 2.5–6.5 (1.4)	−4.89	0.00*
Quantity (drinks/occasion)	2.1, 1–3.5 (0.92)	1.7, 1–2 (0.42)	0.92	0.37
Drinkers (no.)	13	6
Nicotine use
Frequency (days/week)	5.1, 1–7 (2.3)	5.7, 3–7 (2.3)	−0.40	0.70
Quantity (cigarettes/day)	6.3, 1.5–13 (3.0)	2.8, 2.5–3 (.29)	2.00	0.07
Smokers (no.)	13	6
Caffeine use
Frequency (days/week)	4.4, 1–7 (2.5)	3.6, 1–7 (2.4)	0.78	0.44
Quantity (cups/day)	1.3, 1–2 (0.43)	1.3, 1–4 (0.90)	0.26	0.80
Caffeine users (no.)	13	11
Clinical characteristics
DSM-IV-R cocaine dependence	10	na
DSM-IV-R cocaine abuse	3	na
Cocaine nondependent/abusers	7

^*denotes significant group difference.