Table 1.

Pretreatment characteristics.

	Placebo CBT	Placebo CBT+CM	Naltrexone CBT	Naltrexone CBT+CM
Demographics (N)	N=27	N=14	N==20	N=25
Age in years (M, SD)	33.00 (1.29)	41.97 (7.40)	32.82 (1.16)	32.95 (1.28)
Male (%, N)	96.3% (N=26)	92.9% (N=13)	90.0% (N=18)	76% (N=19)
Caucasian (%, N)	14.8% (N=4)	7.1% (N=1)	15% (N=3)	16% (N=4)
Employed (%, N)	37.0% (N=10)	28.5% (N=4)	40.1% (N=8)	36.0% (N=9)
Years education (M, SD)	12.33 (1.96)	11.57 (1.51)	12.47 (1.54)	12.00 (1.76)
Days using substance/month
Cocaine (M, SD)	16.85 (8.29)	17.43 (8.74)	16.74 (8.77)	15.64 (8.66)
Alcohol (M, SD)	22.00 (8.54)	22.43 (7.09)	19.53 (8.24)	19.84 (8.61)
Years using substance/lifetime
Cocaine (M, SD)	14.33 (6.16)	12.29 (7.25)	10.63 (5.51)	14.88 (5.75)
Alcohol (M, SD)	21.17 (6.45)	22.93 (7.87)	21.11 (8.65)	22.40 (6.06)

Note: CBT = Cognitive behavioral therapy. CM = Contingency management.