At the time of incarceration, the Villabona prison administers the Addiction Severity Index as well as a motivation and personality profile to inmates with drug related criminal backgrounds (Casares-Lopez, et al, 2012). Inmates selected for the UTE drug-free treatment unit co-facilitate groups and treatment activities with staff (Casares-Lopez, et al, 2012). The Addiction Severity Index and motivation and personality profiles of fifty inmates from the treatment unit were selected by researchers for study purposes. Inclusion criteria for the selected sample were: diagnosed current substance use disorder, Spanish speaking, with no previous admission to the treatment unit. Exclusion criteria included: no substance use disorder, previous history in the unit, and non-Spanish speaking (Casares-Lopez, et al, 2012). The mean age of participants was 31.78 years (Casares-Lopez, et al, …show more content…
The Millon Clinical Multiaxial Inventory, to assess personality and clinical implications, was administered during the first month of incarceration. Finally, the Stages of Change Readiness and Treatment Eagerness Scale, was also administered within the first month, to assess the participant’s motivation for treatment (Casares-Lopez, et al, 2012). Each scale was re-administered at twelve months of treatment. The independent variable was length of stay in the treatment unit (Casares-Lopez, et al, 2012). A Cox Regression Analysis was conducted to obtain a ‘linear function of the independent variable’ (Casares-Lopez, et al, 2012). Predictor variables of treatment dropout were thus identified (Casares-Lopez, et al, 2012). Thirty-two percent of participants dropped out of the program by six months, and half of the participants dropped out by one year, even though the mean length of sentence for the sample participants was four years from the point of enrollment in the unit (Casares-Lopez, et al, 2012). Results indicated that the higher the participants’ scores in ‘taking steps’ on the Stages of Change Readiness and Treatment Eagerness Scale, the lower the risk of dropping out (Casares-Lopez, et al,