Study shows adolescent depression increases risk for violence

University of Oxford| Wed Aug 09 12:00:05 EDT 2017
Study shows adolescent depression increases risk for violence
 The research team, led by Professor Seena Fazel and Rongqin Yu, from the University of Oxford's Forensic Psychiatry Group, used complementary measures of depression, including self-report and clinical diagnoses, and different measurements of violence including informant reports of violence and official convictions for violent crimes for these three cohorts.

The UK found modest increases in risk of violence in depression. In absolute terms, for instance, in the Finnish sample, 7.1% of individuals with depression were convicted of one or more violent crimes, compared with 3.6% in the general population without depression.

In relative terms, across samples and measurements, the study shows a consistent pattern of increased relative risk of later violence. In the Dutch and UK samples, an increase in depressive symptoms was associated with a significant elevated risk of later violence. In the Finnish sample, the odds of violence in individuals with a diagnosis of depression were increased two-fold, compared to those without depression. These findings highlight the need for active and early treatment of depression in adolescents and young people. The mechanisms behind this link need further investigation, and may involve increased impulsivity, hostility and poor self-regulation. 

This research is important for two main reasons. First, it adds to the evidence of the many potential harms of untreated depression in young people. Second, it suggests that closer liaison between criminal justice and mental health might prevent violence in high-risk individuals. - Professor Seena Fazel  

“We know that high rates of depression have been reported among adolescents in juvenile detention and correctional facilities (e.g.,11% in boys and 29% in girls),” said Dr. Rongqin Yu, lead researcher at the Forensic Psychiatry Group at the University of Oxford, United Kingdom. “However, the longitudinal link between depression and violence was unclear. Our longitudinal design allowed us to take into account previous violence, enabling us to test whether adolescent depression is associated with changes in violence over time."

 
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