A latent class analysis of mental disorders, substance use, and aggressive antisocial behavior among Swedish forensic psychiatric patients

BACKGROUND

Patients in the forensic mental health services (FMHS) with a mental disorder, a co-occurring substance use disorder (SUD), and high risk of aggressive antisocial behavior (AAB) are sometimes referred to as the 'triply troubled'. They suffer poor treatment outcomes, high rates of criminal recidivism, and increased risk of drug related mortality. To improve treatment for this heterogeneous patient group, more insight is needed concerning their co-occurring mental disorders, types of substances used, and the consequent risk of AAB.

METHODS

A three-step latent class analysis (LCA) was used to identify clinically relevant subgroups in a sample of patients (n = 98) from a high-security FMHS clinic in Sweden based on patterns in their history of mental disorders, SUD, types of substances used, and AAB.

RESULTS

A four-class model best fit our data: class 1 (42%) had a high probability of SUD, psychosis, and having used all substances; class 2 (26%) had a high probability of psychosis and cannabis use; class 3 (22%) had a high probability of autism and no substance use; and class 4 (10%) had a high probability of personality disorders and having used all substances. Both polysubstance classes (1 and 4) had a significantly more extensive history of AAB compared to classes 2 and 3. Class 3 and class 4 had extensive histories of self-directed aggression.

CONCLUSIONS

The present study helps disentangle the heterogeneity of the 'triply troubled' patient group in FMHS. The results provide an illustration of a more person-oriented perspective on patient comorbidity and types of substances used which could benefit clinical assessment, treatment planning, and risk-management among patients in forensic psychiatric care.

Implementing clinical guidelines for co-occurring substance use and major mental disorders in Swedish forensic psychiatry: An exploratory, qualitative interview study with mental health care staff

INTRODUCTION

Patients with substance use disorders (SUD) and co-occurring mental disorders (COD) within forensic psychiatric care often suffer poor treatment outcomes and high rates of criminal recidivism, substance use, and psychiatric problems. This study aimed to describe the conditions for, and mental health care staff's experiences with, implementing integrated SUD-focused clinical guidelines, including assessment and treatment for patients with COD at a high-security forensic mental health services (FMHS) facility in Sweden.

METHODS

Study staff conducted nineteen semi-structured interviews with health care staff experienced in administering the new SUD assessment and treatment. The study conducted a thematic analysis to describe the health care staff's experiences with these guidelines and suggestions for improvement.

RESULTS

Most participants reported appreciation for the implementation of clinical guidelines with an SUD focus, an area they considered to have previously been neglected, but also noted the need for more practical guidance in the administration of the assessments. Participants reported the dual roles of caregiver and warden as difficult to reconcile and a similar, hindering division was also present in the health care staff's attitudes toward SUD. Participants' reports also described an imbalance prior to the implementation, whereby SUD was rarely assessed but treatment was still initiated. One year after the implementation, an imbalance still existed, but in reverse: SUD was more frequently assessed, but treatment was difficult to initiate.

CONCLUSIONS

Despite indications of some ambivalence among staff regarding the necessity of the assessment and treatment guidelines, many participants considered it helpful to have a structured way to assess and treat SUD in this patient group. The imbalance between frequent assessment and infrequent treatment may have been due to difficulties transitioning patients across the "gap" between assessment and treatment. To bridge this gap, mental health services should make efforts to increase patients' insight concerning their SUD, flexibility in the administration of treatment, and the motivational skills of the health care staff working with this patient group. Participants considered important for enhancing treatment quality a shared knowledge base regarding SUD, and increased collaboration between different professions and between in- and outpatient services.