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Background Individuals with autism spectrum disorder (ASD) and intellectual disability (ID) are at increased risk of potentially traumatic events and may be at increased risk of post‐traumatic stress disorder (PTSD). However, knowledge regarding identification of PTSD in this population is limited. The aim of this study was to investigate clinical experience regarding PTSD and trauma assessment in individuals with co‐occurring ASD and ID. Method Interpretative phenomenological analysis was used to explore experiences of identifying PTSD in this population among 18 mental health clinicians working with ASD and ID. Results Informants viewed PTSD in individuals with ASD and ID as equivalent to PTSD in the general population, but with causes and expressions potentially differing. Several factors were described to contribute to challenges in identification. Conclusions Trauma may have severe impact in individuals with ASD and ID. Multidimensional, individualized assessment strategies seem necessary to recognize PTSD or trauma‐related symptoms in this population.

OBJECTIVEPatients with co-occurring autism spectrum disorders (ASD) and substance use disorder (SUD) require special attention from clinical services. Screening for this co-occurrence is not generally an integral part of routine clinical assessments, and failure to identify and understand this group of patients may contribute to a worsening of their symptoms and/or an increase in drug abuse. Thus, there is a need to review the evidence base on patients with co-occurring ASD and SUD in order to enhance clinical practice and future research.METHODSWe reviewed all identified papers on patients with co-occurring ASD and SUD. The focus of the review was on epidemiology, patient characteristics, function of drug use, and the effect of current interventions.RESULTSA total of 18 papers were included in the analysis. Eleven papers were based on epidemiological studies, although only one study reported the prevalence of ASD in an SUD population. Two papers explored the role of personality, three papers studied subgroups of individuals serving prison for violent or sexual crimes, and one paper explored the function of drugs in the ASD patient group. There were no studies testing specific treatment interventions.CONCLUSIONSIn most of the treatment settings studied, there were relatively few patients with co-occurring ASD and SUD, but due to differences in study samples it was difficult to establish a general prevalence rate. The one consistent finding was the lack of focused treatment studies. There is clearly a need for research on interventions that take account of the special needs of this patient group.

This study examined the characteristics of adults with autism spectrum disorder who have undergone a forensic examination and explored any relationships between the diagnosis and the offence. The reports described 41 men and 7 women. The autism spectrum disorder was diagnosed late (mean age: 25.3 years), and 22 of the 48 cases were diagnosed with autism spectrum disorder for the first time by the forensic experts. The education level and employment status were low. Family networks were close, but social networks outside the family were limited. Co-morbid diagnoses were common, and more than half of the group knew their victims. The examined individuals constitute a vulnerable and heterogeneous group, as do offenders within other diagnostic categories. Unlike most others who commit criminal acts, the majority of the individuals with autism spectrum disorder in this study showed no evidence of substance abuse, had a close relationship to their victims and were willing to confess to the accused crime. No clear association between the characteristics of autism spectrum disorder and the criminal act were identified, but in most cases, autism spectrum disorder characteristics, such as idiosyncratic comprehensions and obsessions appeared to be related to the motive for the offence.