Treatment programmes for people with both severe mental illness and substance misuse

Area of Science:

• Psychiatry
• Addiction Medicine
• Public Health

Background:

• Substance misuse significantly complicates severe mental illness (SMI).
• Integrated treatment programs aim to address both SMI and substance misuse concurrently.
• These integrated programs often require substantial resource allocation and service delivery system redesign.

Purpose of the Study:

• To systematically evaluate the effectiveness of integrated treatment programs for individuals with co-occurring severe mental illness and substance misuse disorders.
• Assess the evidence base for specialized interventions compared to standard care.

Main Methods:

• Comprehensive literature search of multiple databases (e.g., MEDLINE, PsycLIT, EMBASE) from inception to 1998.
• Inclusion of all randomized controlled trials (RCTs) comparing substance misuse treatment programs with standard care for SMI patients.
• Independent data extraction and quality assessment of identified studies, with meta-analysis using Peto odds ratios.

Main Results:

• Only six relevant studies were identified, with four being small and generally of low methodological quality.
• Crucial clinical outcomes like relapse rates, violence, patient satisfaction, social functioning, and employment were not reported.
• No clear evidence demonstrated the superiority of any specific substance misuse program over standard care for individuals with SMI.

Conclusions:

• The challenge of co-occurring substance misuse and severe mental illness persists.
• Current enthusiasm for integrated programs is not supported by robust empirical evidence.
• Future implementation of specialized services necessitates rigorous, well-designed controlled clinical trials.