Similarities in diagnostic comorbidity between suicide among young people in Sweden and the United States

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Abstract
A significant difference in the prevalence of personality disorders was reported between similar studies of suicide among young people (under age 30) performed in San Diego, California (10% of 133 cases), and Göteborg, Sweden (34% of 58 cases). The difference was due entirely to the absence of borderline personality disorder (BPD) reported in the San Diego sample. In this study, we used preselected variables to reassess the suicides from the San Diego study for criteria consistent with BPD. We found that 41% met the criteria, which was now not significantly different from the Göteborg sample. Comparisons among a number of other demographic, social, and diagnostic variables revealed many similarities in the two samples, particularly Axis I comorbidity with depression and/or substance abuse and Axis II comorbidity with antisocial personality disorder. We conclude that the characteristics associated with BPD identify similar young persons who committed suicide in Sweden and the United States. Questions remain as to whether or not Axis I and II disorders are independent in relation to suicide. The comorbidity pattern described here must be considered seriously in the clinical setting for its fatal implications.

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