More attention is needed to develop rehabilitation interventions in supported housing programs to improve social integration of chronically homeless adults. Because improvements in some domains of social integration were only weakly related, it may be necessary to intervene in multiple domains simultaneously.

Both direct placement in supported community housing and pre-treatment with time-limited residential treatment are used as approaches to helping chronically homeless adults exit from homelessness but relative effectiveness and cost remains untested. The current observational study utilized data from a national, multi-site housing project to determine whether clients who receive residential treatment or transitional housing before being placed into independent housing achieve superior outcomes than clients who are immediately placed into independent housing, and whether they incur greater healthcare costs. A total of 709 participants (131 and 578 participants in the respective groups) were assessed every 3 months for 2 years on housing outcomes, community adjustment, work and income, mental and physical health, and health service costs. Clients who received immediate, independent housing had more days in their own place, less days incarcerated, and reported having more choice over treatment; but no differences on other clinical or community adjustment outcomes. In this observational study, there were no clinical advantages for clients who had residential treatment or transitional housing prior to entry into community housing, but they incurred higher substance abuse service costs. Studies using randomized controlled trials of these conditions are needed to establish causation.

Collaborative Initiative to Help End Chronic Homelessness clients (N = 734) were enrolled into an evaluation wherein assessments at program entry and quarterly thereafter addressed sociodemographic characteristics, health status, and a wide range of service use and outcomes data. Mixed linear regression analysis was used to test for significant changes over time. The average number of days housed during the previous 3 months increased dramatically from 18 at baseline to 83 by year's end. Significant improvements of more modest magnitude were also observed in overall quality of life, mental health functioning, and reduced psychological distress. Alcohol and drug problems remained largely unchanged over time, among clients overall. However, among baseline drug users crack, cocaine, and marijuana use decreased by 28-50% over the follow-up period. Total quarterly health cost estimates declined by 50%, as well, from $6,832 to $3,376. These findings suggest that adults who have experienced chronic homelessness may be successfully housed and can maintain their housing, when provided with comprehensive services.

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