Despite the many caveats in comparative criminological research, best estimates define Sweden as having a middle-to-high level of violence in terms of common violent crimes such as robbery and assault12 in the European context. The Development of Aggressive AntiSocial Behaviour Study (DAABS) is a multicentre study aimed at investigating the prevalence of developmental and clinical disorders in a nationally representative cohort of young adult male violent offenders sentenced to prison. The study will also follow up the participants on criminal recidivism, consumption of physical and psychiatric healthcare and mortality through official Swedish registers.
In Sweden, a small number (approximately 300/year) of primarily violent offenders, suffering from classical psychotic disorders, are court ordered to forensic psychiatric care after going through a forensic psychiatric investigation. These offenders are not included in the DAABS.