Patient outcomes following discharge from secure psychiatric hospitals: systematic review and meta-analysis

Background Secure hospitals are a high-cost, low-volume service consuming around a fifth of the overall mental health budget in England and Wales. Aims A systematic review and meta-analysis of adverse outcomes after discharge along with a comparison with rates in other clinical and forensic groups in order to inform public health and policy. Method We searched for primary studies that followed patients discharged from a secure hospital, and reported mortality, readmissions or reconvictions. We determined crude rates for all adverse outcomes. Results In total, 35 studies from 10 countries were included, involving 12 056 patients out of which 53% were violent offenders. The crude death rate for all-cause mortality was 1538 per 100 000 person-years (95% CI 1175-1901). For suicide, the crude death rate was 325 per 100000 person-years (95% CI 235 415). The readmission rate was 7208 per 100000 person-years (95% CI 5916-8500). Crude reoffending rates were 4484 per 100000 person-years (95% CI 3679-5287), with lower rates in more recent studies. Conclusions There is some evidence that patients discharged from forensic psychiatric services have lower offending outcomes than many comparative groups. Services could consider improving interventions aimed at reducing premature mortality, particularly suicide, in discharged patients.