Substance-use disorders, personality traits, and sex differences in institutionalized adolescents.

BACKGROUND: Substance-use disorder (SUD) was found to be an aggravating factor to delinquency and is closely related to personality disorders (PDs). OBJECTIVES: The aim of this study was to investigate sex differences in the relationship between PD traits and SUD in adolescents institutionalized in child welfare and juvenile justice institutions. METHODS: PD traits were measured dimensionally in a sample of 282 boys (69 with an SUD diagnosis) and 143 girls (45 with an SUD diagnosis) from child welfare and juvenile-justice institutions. RESULTS: Logistic regressions showed that antisocial, borderline, and paranoid personality traits were positively associated with SUD, while obsessive compulsive personality traits were negatively related with SUD. Additionally, in institutionalized girls, self-defeating personality traits were associated with less risk of SUD. CONCLUSION: This study provides a relative evidence for sex specificities in the relation between PD traits and SUD.

Examination of the importance of age of onset, callous-unemotional traits and anger dysregulation in youths with antisocial behaviors.

Age of onset, callous-unemotional (CU) traits and anger dysregulation have separately been proposed as relevant factors in explaining the heterogeneity of antisocial behaviour (ASB). Taking a dimensional perspective, this study examined the specific contributions and the mutual influences (i.e., interactions) of these three characteristics on specific dimensions of ASB (i.e., criminal behaviours and externalizing symptoms). Assessments were conducted on 536 youths from institutions with the youth psychopathic traits inventory (CU traits), the Massachusetts youth screening instrument-second version (anger dysregulation), the criminology questionnaire (criminal behaviours) and the child behavior checklist (externalizing symptoms), rated by both the youths and their carers. Using Bayes as estimators, the results revealed that the number and frequency of crimes (and, more specifically, damage to property, property offenses and media crimes) were explained by a specific contribution of each factor (age of onset, CU traits and anger dysregulation). Additionally, the interactions between age of onset and CU traits or anger dysregulation were relevant predictors of some types of crimes (i.e., damage to property, property offences and media crimes). Furthermore, when rated by youths, externalizing symptoms were explained by CU traits and anger dysregulation. However, when rated by the carer, anger dysregulation was more important in explaining externalizing symptoms. This study highlights the importance of considering these factors altogether and the value of using a dimensional perspective when examining the structure of ASB in youths. Consequently, future classifications should take into account the mutual account of these characteristics, which were previously studied separately.