Subjects were assessed with the Semi-Structured Assessment for Drug Dependence and Alcoholism (SSADDA), a computer-assisted interview that yields lifetime DSM-IV diagnoses of substance use and most Axis I psychiatric disorders, as well as antisocial personality disorder (Pierucci-Lagha et al., 2005, 2007). It includes a specific section dedicated to the diagnosis of OD. The test-retest and inter-rater reliabilities of the SSADDA diagnosis of OD were excellent, with κ =0.94 and 0.91, respectively (Pierucci-Lagha et al., 2005).
