Martin Grann

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BACKGROUND Although expert opinion has asserted that there is an increased risk of violence in individuals with schizophrenia and other psychoses, there is substantial heterogeneity between studies reporting risk of violence, and uncertainty over the causes of this heterogeneity. We undertook a systematic review of studies that report on associations(More)
Its controversial past notwithstanding, psychopathy has emerged as one of the most important clinical constructs in the criminal justice and mental health systems. One reason for the surge in theoretical and applied interest in the disorder is the development and widespread adoption of reliable and valid methods for its measurement. The Hare PCL-R provides(More)
OBJECTIVE To investigate the predictive validity of psychopathic personality traits (assessed with the revised psychopathy checklist, PCL-R; Hare, 1991) for violent criminal recidivism among young offenders. METHOD The relationship between PCL-R psychopathy and violent re-offending was studied in 98 young (M=18.40, range 15-20 years) violent and sex(More)
BACKGROUND Both psychopathic personality traits and antisocial behavior are influenced by genetic as well as environmental factors. However, little is known about how genetic and environmental factors contribute to the associations between the psychopathic personality traits and antisocial behavior. METHOD Data were drawn from a longitudinal(More)
OBJECTIVE This study aimed to determine the population impact of patients with severe mental illness on violent crime. METHOD Sweden possesses high-quality national registers for all hospital admissions and criminal convictions. All individuals discharged from the hospital with ICD diagnoses of schizophrenia and other psychoses (N=98,082) were linked to(More)
BACKGROUND Socioeconomic status is often assumed to be of importance for the development of antisocial behavior, yet it explains only a fraction of the variance. One explanation for this paradox could be that socioeconomic status moderates the influence of genetic and environmental effects on antisocial behavior. METHOD TCHAD is a Swedish longitudinal(More)
OBJECTIVE The authors examined psychiatric diagnoses of all individuals convicted of homicide and attempted homicide in Sweden from 1988 to 2001 (N=2,005). METHOD High-quality national crime and hospital registers were linked to investigate standardized psychiatric diagnoses of homicide offenders. RESULTS The presence or absence of psychiatric diagnoses(More)
CONTEXT Persons with schizophrenia are thought to be at increased risk of committing violent crime 4 to 6 times the level of general population individuals without this disorder. However, risk estimates vary substantially across studies, and considerable uncertainty exists as to what mediates this elevated risk. Despite this uncertainty, current guidelines(More)
BACKGROUND Epilepsy and traumatic brain injury are common neurological conditions, with general population prevalence estimates around 0.5% and 0.3%, respectively. Although both illnesses are associated with various adverse outcomes, and expert opinion has suggested increased criminality, links with violent behaviour remain uncertain. METHODS AND FINDINGS(More)
OBJECTIVE Diagnosing personality disorders according to structured expert interviews is time-consuming and costly. For epidemiological studies, self-report instruments have several advantages. The DSM-IV and ICD-10 personality questionnaire (DIP-Q) is a selfreport questionnaire constructed to identify personality disorder according to DSM-IV and ICD-10. (More)