FRANÇAIS :
Cette étude utilise des données issues du National Drug Abuse Treatment Outcome Studies (DATOS) pour mettre en évidence les relations existant entre l'hostilité et la dépression de pré-traitement à l'usage de drogue et au comportement criminel dans la première année et dans la cinquième année suivant le traitement.

ENGLISH :
Aims : This study used data from the national Drug Abuse Treatment Outcome Studies (DATOS) to investigate the associations that pre-treatment depression and hostility have with drug use and criminal behavior at 1 year and 5 year follow-up in patients with and without additional treatment involvement in the year prior to each follow-up. Design : Following a naturalistic, non-experimental evaluation design, admissions to methadone treatment were followed up approximately 1 and 5 years later. Data analysis was conducted using multiple logistic regression. Setting Eighteen programs from DATOS were included. Participants : An analytic sample consisting of 727 patients at 1 year follow-up and 432 patients at 5 year follow-up was included. Findings : Multiple logistic regression analyses revealed that greater depression predicted less drug use in the year preceding each follow-up, whereas greater hostility predicted increased drug use and more arrests at each follow-up. Furthermore, these predictive relationships appeared only among individuals not involved in additional treatment. Conclusions : Depression and hostility showed opposite associations with outcomes, underscoring the need to assess these psychological conditions separately and tailor treatment plans appropriately. (Review' s abstract)