Self-harm, comprising non-suicidal self-injury, and suicide attempts, is a serious and potentially life-threatening behavior that has been associated with poor life quality and an increased risk of suicide. In forensic populations, increased rates of self-harm have been reported, and suicide is one of the leading causes of death. Aside from associations between self-harm and mental disorders, knowledge on self-harm in forensic psychiatric populations is limited. The purpose of this study was to characterize the clinical needs of a cohort of forensic psychiatric patients, including self-harm and possible risk factors thereof. Participants (N = 98) were consecutively recruited from a cohort of forensic psychiatric patients in Sweden from 2016 to 2020. Data were collected through file information, self-reports, and complemented with semi-structured interviews. Results showed that self-harm was common among the participants, more than half (68.4%) of whom had at some point engaged in self-harm. The most common methods of non-suicidal self-injury were banging one's head or fist against a wall or other solid surface and cutting, and the most common method of suicide attempt was hanging. The most prominent functions of non-suicidal self-injury among the participants were intrapersonal functions such as affect regulation, self-punishment, and marking distress. Self-harm in general was associated to neurodevelopmental disorders (p = 0.014, CI = 1.23–8.02, OR = 3.14) and disruptive impulse-control and conduct disorders (p = 0.012, CI = 1.19–74.6, OR = 9.41), with reservation to very wide confidence intervals. Conclusions drawn from this study are that self-harm was highly prevalent in this sample and seems to have similar function in this group of individuals as in other studied clinical and non-clinical groups.

Deliberate self-harm behavior (DSH) can have profound effects on a person’s quality of life, and challenges the health care system. Even though DSH has been associated with aggressive interpersonal behaviors, the knowledge on DSH in persons exhibiting such behaviors is scarce. This study aims to (1) specify the prevalence and character of DSH, (2) identify clinical, neurocognitive, psychosocial, and criminological characteristics associated with DSH, and (3) determine predictors of DSH among young violent offenders. Data were collected from a nationally representative cohort of 270 male violent offenders, 18–25 years old, imprisoned in Sweden. Participants were interviewed and investigated neuropsychologically, and their files were reviewed for psychosocial background, criminal history, mental disorders, lifetime aggressive antisocial behaviors, and DSH. A total of 62 offenders (23%) had engaged in DSH at some point during their lifetime, many on repeated occasions, yet without suicidal intent. DSH was significantly associated with attention deficit hyperactivity disorder, mood disorders, anxiety disorders, various substance use disorders, being bullied at school, and repeated exposure to violence at home during childhood. Mood disorders, anxiety disorders, and being bullied at school remained significant predictors of DSH in a total regression model. Violent offenders direct aggressive behaviors not only toward other people, but also toward themselves. Thus, DSH must be assessed and prevented in correctional institutions as early as possible, and more knowledge is needed of the function of DSH among offenders.

Background Exposure to adverse childhood experiences (ACE) have been found to have profound negative consequences on an individuals’ health. Non-suicidal self-injury (NSSI) is a clinically complex and serious global health issue and is closely related to suicide attempts. Previous research has found associations between ACE and NSSI and suicide attempts in clinical samples. However, this association has to our knowledge not been studied to this extent in a sample of forensic psychiatric patients. The aim of this study was therefore to describe the prevalence of adverse childhood experiences (ACE) and their associations with non-suicidal self-injury (NSSI) and/or suicide attempts in forensic psychiatric patients. Methods The current study is a cross-sectional study of a consecutive cohort of 98 forensic psychiatric patients (86.7% male) in Sweden. We invited 184 patients with a predicted stay of > 8 weeks who had been cleared for participation by their treating psychiatrist. Of these, 83 declined and 98 eligible patients provided informed consent. Information on ACE, NSSI, and suicide attempts derived from files, self-reports (Childhood Trauma Questionnaire-Short Form; CTQ-SF), and interviews were compared separately among participants with and without NSSI or suicide attempts using t-tests. The dose–response association between ACE and NSSI/suicide attempts was analysed using binary logistic regression. Results In file reviews, 57.2% of participants reported physical abuse, 20% sexual abuse, and 43% repeated bullying by peers during childhood. NSSI and suicide attempts were associated significantly with CTQ-SF total scores, with medium effect sizes (d = .60 to .63, p < .01), and strongly with several CTQ-SF subscales. Parental substance abuse was also associated with NSSI (p = .006, OR = 3.23; 95% confidence interval [CI] = 1.36 to 7.66) and suicide attempts (p = .018, OR = 2.75; 95% CI = 1.18 to 6.42). Each additional ACE factor predicted an increased probability of NSSI (p = .016, OR = 1.29; CI = 1.04 to 1.59) but not of suicide attempts. When anxiety and depressive disorders were included in the model, ACE remained a significant predictor of NSSI. Conclusions We report extensive ACE, from both files and self-reports. When comparing groups, correlations were found between ACE and NSSI, and ACE and suicide attempts among forensic psychiatric patients. ACE seem to predict NSSI but not suicide attempts in this group, even when controlling for affective and anxiety disorders. Early ACE among forensic psychiatric patients, especially physical and emotional abuse and parental substance abuse, have important impacts on self-harming behaviours that must be acknowledged both by the institutions that meet them as children and in their later assessment and treatment.