Substance Abuse and Excessive Mortality Among Forensic Psychiatric Patients: A Finnish Nationwide Cohort Study

Duration of forensic psychiatric care and subsequent criminal recidivism in individuals sentenced in Sweden between 2009 and 2019

Background

The duration of forensic psychiatric care is in Sweden not determined at the time of sentencing; instead, offenders are regularly evaluated, often with regard to risk of criminal recidivism. The length and justifiability of such a sanction have been greatly debated; however, previous estimates of treatment duration based on datasets delimited to discharged patients—have provided an uncertain groundwork for these deliberations. The aim of this study was to use a more suitable approach to calculate average duration of forensic psychiatric care and to examine the relationship between length of treatment and subsequent recidivism after discharge.

Methods

This retrospective cohort study focused on offenders sentenced to forensic psychiatric care in Sweden between 2009 and 2019 and registered in the Swedish National Forensic Psychiatric Register (n = 2064), with a follow-up period until May 2020. We used Kaplan–Meier estimator to calculate and visualize treatment duration including analyses comparing levels of relevant variables, and then evaluated criminal recidivism in patients discharged from treatment between 2009 and 2019 (n = 640), after stratification for the same variables and dichotomization by treatment duration.

Results

The median duration of forensic psychiatric care was estimated to 89.7 months (95% CI 83.2–95.8). Treatment was longer in offenders who committed violent crimes, suffered from psychosis, or had a history of substance use disorder, and in offenders whose sentences included special court supervision. The cumulative incidence of recidivism in patients discharged from treatment was estimated to 13.5% at 12 months (95% CI 10.6–16.2) and 19.5% at 24 months (95% CI 16.0–22.8). Corresponding cumulative incidence of violent crime post discharge was 6.3% at 12 months (95% CI 4.3–8.3) and 9.9% at 24 months (95% CI 7.3–12.4). Among other findings, in patients without a history of substance use disorder and patients whose sentences did not include special court supervision, recidivism was significantly higher in those with a shorter treatment duration.

Conclusion

Using the entirety of a suitable, contemporary, prospectively enrolled cohort of mentally ill offenders, we were able to estimate—with greater accuracy than previous studies—the average duration of Swedish forensic psychiatric care and rate of subsequent criminal recidivism.

Morbidity and mortality in schizophrenia with comorbid substance use disorders

OBJECTIVE

Schizophrenia is highly comorbid with substance use disorders (SUD) but large epidemiological cohorts exploring the prevalence and prognostic significance of SUD are lacking. Here, we investigated the prevalence of SUD in patients with schizophrenia in Finland and Sweden, and the effect of these co-occurring disorders on risks of psychiatric hospitalization and mortality.

METHODS

45,476 individuals with schizophrenia from two independent national cohort studies, aged <46 years at cohort entry, were followed during 22 (1996-2017, Finland) and 11 years (2006-2016, Sweden). We first assessed SUD prevalence (excluding smoking). Then, we performed Cox regression on risk of psychiatric hospitalization and all-cause and cause-specific mortality in SUD compared with those without SUD.

RESULTS

The prevalence of SUD ranged from 26% (Finland) to 31% (Sweden). Multiple drug use (n = 4164, 48%, Finland; n = 3268, 67%, Sweden) and alcohol use disorders (n = 3846, 45%, Finland; n = 1002, 21%, Sweden) were the most prevalent SUD, followed by cannabis. Any SUD comorbidity, and particularly multiple drug use and alcohol use, were associated with 50% to 100% increase in hospitalization (aHR any SUD: 1.53, 95% CI = 1.46-1.61, Finland; 1.83, 1.72-1.96, Sweden) and mortality (aHR all-cause mortality: 1.65, 95% CI = 1.50-1.81, Finland; 2.17, 1.74-2.70, Sweden) compared to individuals without SUD. Elevated mortality risks were observed especially for suicides and other external causes. All results were similar across countries.

CONCLUSION

Co-occurring SUD, and particularly alcohol and multiple drug use, are associated with high rates of hospitalization and mortality in schizophrenia. Preventive interventions should prioritize detection and tailored treatments for these comorbidities, which often remain underdiagnosed and untreated.

Genesis of change: Substance use treatment for forensic patients with mental health concerns

Substance use disorders are highly prevalent among forensic patients. They are associated with many challenges for patients with these problems, including their ability to rehabilitate and successfully move through secure forensic mental health services, as well as increasing risk for recidivism. Traditionally, forensic services have been more adept at focusing on and treating the primary mental health diagnosis alone and have been less likely to prioritise this co-occurring patient need. Opportunities exist to foster effective treatment strategies for substance use disorders, and past research has produced positive outcomes among forensic patients in studies in both Australia and the UK to navigate a new course for patients with these problems. By providing empirically validated, co-produced and culturally competent treatment responses, forensic patients living with substance use disorders will have the opportunity to significantly improve their wellbeing and progress through the system. They will also be more prepared and equipped to face challenges upon discharge into the community, including increased availability of alcohol and other drugs, social stigma and barriers to employment. Moreover, by prioritising effective substance use treatment programs during inpatient rehabilitation, services can reduce the levels of post-discharge recidivism.

Mortality among male forensic and non-forensic psychiatric patients: matched cohort study of rates, predictors and causes-of-death

Background: The mortality of forensic psychiatric (FP) patients compared to non-forensic psychiatric (non-FP) patients has been sparsely examined.Methods: We conducted a matched cohort study and compared Danish male FP patients (n = 490) who underwent pre-trial forensic psychiatric assessment (FPA) 1980-1992 and were subsequently sentenced to psychiatric treatment with matched (on year of birth, marital status, and municipality of residence) male non-FP patients (n = 490) and male general population controls (n = 1716). FP and non-FP patients were also matched on major psychiatric diagnostic categories. To determine mortality and identify potential predictors of mortality, we linked nationwide register data (demographics, education, employment, psychiatric admission pattern and diagnoses, cause of death) to study cohorts. Average follow-up time was 19 years from FPA assessment/sampling until death/censoring or 31 December 2010 and risk factors were studied/controlled with Cox proportional hazard analysis.Results: Overall, psychiatric patients had significantly higher mortality compared to matched general population controls (medium to large effects). Among patients, 44% (213) of FP vs. 36% (178) of matched non-FP patients died during follow-up (p = 0.02). When we used Cox regression modeling to control for potential risk factors; age, education, immigrant background, employed/studying at index, length of psychiatric inpatient stay/year, and ever being diagnosed with substance use disorder (SUD), FP patient status was no longer significantly associated with increased mortality, whereas SUD and longer inpatient time per year were independently associated with increased mortality.Discussion: This study suggests that SUD and longer inpatient time per year are independent risk factors for increased mortality in psychiatric patients.

Mortality Among Patients Discharged From an Acute Psychiatric Department: A 5-Year Prospective Study

The primary aim of the study was to explore the post discharge standardized mortality ratio of patients from an acute psychiatric department in Norway. The secondary aims were to explore if the standardized mortality ratio is still increasing and to examine the causes of death in the defined population. We conducted a 5-year prospective study among patients admitted to an acute psychiatric department with catchment area responsibilities. A total of 380 patients were included in the study, and the number and causes of deaths were obtained from the Norwegian Cause of Death Registry. Excess mortality was found for the patient group. The standardized mortality ratio for all causes of death was 6.7 (95% CI, 4.6-8.8). The study finds an increased standardized mortality ratio relative to a previous corresponding study in Norway, and the suicide risk was especially elevated the first 2 years after discharge.