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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Drug Alcohol Depend. 2016 Mar 16;162:182–189. doi: 10.1016/j.drugalcdep.2016.03.006

Table 4.

Multivariate Predictors of Treatment Outcomes: Retention in Treatment, Longest Duration of Abstinence (LDA), and Percent Negative Samples

Predictors Retention LDA Percent Negative Samples
Statistic p Statistic p Statistic p
Study F (5,477) = 4.45 .001 F (5,477) = 10.23 <.001 F (5,477) = 30.15 <.001
Race F (2,477) = 0.26 .77 F (2,477) = 0.99 .37 F (2,477) = 3.11 .05
Age F (1,477) = 2.28 .13 F (1,477) = 3.50 .06 F (1,477) = 0.03 .87
Years of Education F (1,477) = 0.90 .36 F (1,477) = 5.29 .02 F (1,477) = 0.84 .36
ASI employment F (1,477) = 0.003 .96 F (1,477) = 0.004 .95 F (1,477) = 0.20 .66
History of trading sex F (1,477) = 0.30 .58 F (1,477) = 2.36 .13 F (1,477) = 0.01 .93
Treatment condition F (1,477) = 8.25 .004 F (1,477) = 37.40 <.001 F (1,477) = 4.47 .04
Interaction: History of trading sex by Treatment condition F (1,477) = 0.17 .68 F (1,477) = 0.61 .44 F (1,477) = 2.36 .13

Notes: ASI = Addiction Severity Index, LDA = longest duration of abstinence achieved during treatment. Lifetime history of trading sex for drugs or money was assessed at baseline.