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. Author manuscript; available in PMC: 2010 May 11.
Published in final edited form as: Crim Justice Behav. 2009;36(9):935–953. doi: 10.1177/0093854809338769

Table 2. Retention of Participants over the 26-Week Intervention.

Variable Study Condition p*
Standard n=37 Drug Testing n=35 Treatment Plan n=34 Combined n=30
Participants who completed intervention, % 35 43 38 30 0.75
Number of weeks in intervention, mean (SD) 18.5 (9.6) 16.9 (10.3) 19.2 (8.6) 16.5 (9.8) 0.63
*

Based on ANOVA for continuous variables and on chi-square for categorical variables.