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. 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 3.

Primary outcomes: Cocaine and other drug use within treatment: Randomized sample by treatment assignment

Variable CBT4CBT TAU F or X2 p Effect size 1
N or mean % or Sd n or mean % or Sd
Randomized sample (N=101) N=47 N=54
 Percent days of abstinence, self-report 65.3 29.4 56.6 31.6 1.97 .16 .28
 Percent cocaine-free urine samples 24.4 35.5 19.0 28.7 2.36 .13 .19
 Percent drug-free urine samples 22.5 30.3 11.9 24.0 3.45 .06 .44
Number and percent of sample attaining 3 or more weeks of continuous abstinence 17 36.2 9 17.0 4.77 .03 .36
Completer sample N=69 N=34 N=35
 Percent days of abstinence, self-report 67.8 26.4 59.4 27.7 1.65 .23 .30
 Percent cocaine-free urine samples 33.3 34,2 18.8 24.4 4.14 .05 .59
 Percent drug-free urine samples 26.7 29.8 12.4 21.9 5.16 .03 .65
Number and proportion of sample attaining 3 or more weeks of continuous abstinence 11 32.4 3 8.0 6.03 .01 .20

Note.

1

Indicates effect size expressed as Cohen’s d for means and odds ratio for proportions (Proportion of sample attaining 3 or more weeks of abstinence)