A Norwegian version of the Structured Interview for DSM-IV Personality (SIDP-IV) (38) was used to assess all 10 DSM-IV personality disorders and conduct disorder. The DSM-III-R and DSM-IV versions of this interview have been used previously in large-scale studies in Norway (39, 40). The SIDP-IV, a comprehensive semistructured diagnostic interview for the assessment of DSM-IV personality disorders, contains nonpejorative questions organized into topical sections rather than by individual personality disorder, thereby improving the interview flow. The SIDP-IV interview was conducted after the M-CIDI, which helped to distinguish long-standing behaviors from temporary states resulting from axis I disorders.
