Skip to main content
. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Am J Psychiatry. 2014 Apr 1;171(4):436–444. doi: 10.1176/appi.ajp.2013.13070987

Table 1.

Baseline variables by treatment assignment, N= 101

Categorical variables CBT4CBT1
n=47		 TAU 2
n=54		 F or X2 P
n or mean % or SD n or mean % or SD
 Number (percent) female 28 59.6% 33 61.1% .025 .87
 Ethnicity, number (%)
  European American 28 59.6 33 61.1 2.57 .63
  African-American 16 34 14 25.9
  Latin American 3 6.4 5 9.3
  Native American, other 0 0 2 3.9
 Number (%) completed high school 31 66 41 75.9 1.22 .27
 Number (%) never married/living alone 41 87.2 48 88.9 0.07 .80
 Number (%) unemployed 43 91.5 47 87 0.51 .47
 Number (%) on probation or parole 7 14.9 10 18.5 0.24 .63
 Number (%) major depression - Lifetime3 15 31,9 14 25.9 0.44 .51
 Number (%) anxiety disorder -Lifetime 16 34 16 29.6 0.23 .63
 Number (%) current alcohol use disorder 1 2.2 3 5.7 0.77 .38
Continuous variables
 Age, years 42.7 9.5 41.3 9.7 0.55 .46
 Years of regular cocaine use 12.6 7.1 10.6 9.6 1.34 .25
 Days of cocaine use, past 28 15.5 9.5 13.9 9.3 0.79 .38
 Days of heroin use, past 28 1.2 4.2 2.0 5.2 0.77 .38
 Days of marijuana use, past 28 1.8 5.3 3.1 7.2 1.06 .31
 Days of alcohol use, past 28 0.5 0.5 0.4 0.5 0.60 .44
 Age of first use of cocaine 20.0 5.3 20.1 5.1 0.00 .99
 ASI Medical Composite4 0.4 0.4 0.4 0.4 0.13 .72
 ASI Employment Composite 0.7 0.2 0.8 0.3 0.46 .50
 ASI Alcohol Composite 0.1 0.1 0.0 0.1 0.89 .35
 ASI Cocaine Composite 0.7 0.2 0.6 0.3 0.37 .55
 ASI Other Drug Composite 0.1 0.1 0.1 0.1 1.04 .31
 ASI Legal Composite 0.1 0.1 0.1 0.2 0.83 .36
 ASI Family Composite 0.1 0.2 0.1 0.2 0.59 .45
 ASI Psychological Composite 0.2 0.2 0.1 0.2 1.19 .28
 Days paid for working, past 28 3.4 6.7 2.6 6.5 0.38 .54
 Lifetime number of arrests 11.7 14.0 11.0 14.4 0.06 .82
 Number of prior outpatient treatment episodes 3.6 3.7 3.0 6.2 0.36 .55
 Number of prior inpatient treatment episodes 4.2 6.4 3.1 3.8 1.04 .31
 Methadone dose at baseline, mg 84.02 28.32 83.4 27.4 0.01 .91

Note.

1

CBT4CBT indicates access to computer program in addition to standard methadone maintenance and counseling.

2

TAU indicates Standard methadone maintenance and counseling.

3

Indicates DSM-IV diagnosis from SCID interviews.

4

Indicates ASI composite score. Scores range from 0 to 1, with higher scores indicating greater severity of problems. All statistical tests are two-tailed.