To house or not to house: the effects of providing housing to homeless substance abusers in treatment

The effectiveness of abstinence-based and harm reduction-based interventions in reducing problematic substance use in adults who are experiencing homelessness in high income countries: A systematic review and meta-analysis: A systematic review

Background

Homelessness is a traumatic experience, and can have a devastating effect on those experiencing it. People who are homeless often face significant barriers when accessing public services, and have often experienced adverse childhood events, extreme social disadvantage, physical, emotional and sexual abuse, neglect, low self-esteem, poor physical and mental health, and much lower life expectancy compared to the general population. Rates of problematic substance use are disproportionately high, with many using drugs and alcohol to deal with the stress of living on the street, to keep warm, or to block out memories of previous abuse or trauma. Substance dependency can also create barriers to successful transition to stable housing.

Objectives

To understand the effectiveness of different substance use interventions for adults experiencing homelessness.

Search Methods

The primary source of studies for was the 4th edition of the Homelessness Effectiveness Studies Evidence and Gaps Maps (EGM). Searches for the EGM were completed in September 2021. Other potential studies were identified through a call for grey evidence, hand-searching key journals, and unpacking relevant systematic reviews.

Selection Criteria

Eligible studies were impact evaluations that involved some comparison group. We included studies that tested the effectiveness of substance use interventions, and measured substance use outcomes, for adults experiencing homelessness in high income countries.

Data Collection and Analysis

Descriptive characteristics and statistical information in included studies were coded and checked by at least two members of the review team. Studies selected for the review were assessed for confidence in the findings. Standardised effect sizes were calculated and, if a study did not provide sufficient raw data for the calculation of an effect size, author(s) were contacted to obtain these data. We used random-effects meta-analysis and robust-variance estimation procedures to synthesise effect sizes. If a study included multiple effects, we carried out a critical assessment to determine (even if only theoretically) whether the effects are likely to be dependent. Where dependent effects were identified, we used robust variance estimation to determine whether we can account for these. Where effect sizes were converted from a binary to continuous measure (or vice versa), we undertook a sensitivity analysis by running an additional analysis with these studies omitted. We also assessed the sensitivity of results to inclusion of non-randomised studies and studies classified as low confidence in findings. All included an assessment of statistical heterogeneity. Finally, we undertook analysis to assess whether publication bias was likely to be a factor in our findings. For those studies that we were unable to include in meta-analysis, we have provided a narrative synthesis of the study and its findings.

Main Results

We included 48 individual papers covering 34 unique studies. The studies covered 15, 255 participants, with all but one of the studies being from the United States and Canada. Most papers were rated as low confidence (n = 25, or 52%). By far the most common reason for studies being rated as low confidence was high rates of attrition and/or differential attrition of study participants, that fell below the What Works Clearinghouse liberal attrition standard. Eleven of the included studies were rated as medium confidence and 12 studies as high confidence. The interventions included in our analysis were more effective in reducing substance use than treatment as usual, with an overall effect size of -0.11 SD (95% confidence interval [CI], -0.27, 0.05). There was substantial heterogeneity across studies, and the results were sensitive to the removal of low confidence studies (-0.21 SD, 95% CI [-0.59, 0.17] - 6 studies, 17 effect sizes), the removal of quasi-experimental studies (-0.14 SD, 95% CI [-0.30, 0.02] - 14 studies, 41 effect sizes) and the removal of studies where an effect size had been converted from a binary to a continuous outcome (-0.08 SD, 95% CI [-0.31, 0.15] - 10 studies, 31 effect sizes). This suggests that the findings are sensitive to the inclusion of lower quality studies, although unusually the average effect increases when we removed low confidence studies. The average effect for abstinence-based interventions compared to treatment-as-usual (TAU) service provision was -0.28 SD (95% CI, -0.65, 0.09) (6 studies, 15 effect sizes), and for harm reduction interventions compared to a TAU service provision is close to 0 at 0.03 SD (95% CI, -0.08, 0.14) (9 studies, 30 effect sizes). The confidence intervals for both estimates are wide and crossing zero. For both, the comparison groups are primarily abstinence-based, with the exception of two studies where the comparison group condition was unclear. We found that both Assertative Community Treatment and Intensive Case Management were no better than treatment as usual, with average effect on substance use of 0.03 SD, 95% CI [-0.07, 0.13] and -0.47 SD, 95% CI [-0.72, -0.21] 0.05 SD, 95% CI [-0.28, 0.39] respectively. These findings are consistent with wider research, and it is important to note that we only examined the effect on substance use outcomes (these interventions can be effective in terms of other outcomes). We found that CM interventions can be effective in reducing substance use compared to treatment as usual, with an average effect of -0.47 SD, 95% CI (-0.72, -0.21). All of these results need to be considered in light of the quality of the underlying evidence. There were six further interventions where we undertook narrative synthesis. These syntheses suggest that Group Work, Harm Reduction Psychotherapy, and Therapeutic Communities are effective in reducing substance use, with mixed results found for Motivational Interviewing and Talking Therapies (including Cognitive Behavioural Therapy). The narrative synthesis suggested that Residential Rehabilitation was no better than treatment as usual in terms of reducing substance use for our population of interest.

Authors' Conclusions

Although our analysis of harm reduction versus treatment as usual, abstinence versus treatment as usual, and harm reduction versus abstinence suggests that these different approaches make little real difference to the outcomes achieved in comparison to treatment as usual. The findings suggest that some individual interventions are more effective than others. The overall low quality of the primary studies suggests that further primary impact research could be beneficial.

Improving oral health and related health behaviours (substance use, smoking, diet) in people with severe and multiple disadvantage: A systematic review of effectiveness and cost-effectiveness of interventions

BACKGROUND

People experiencing homelessness co-occurring with substance use or offending ('severe and multiple disadvantage' SMD) often have high levels of poor oral health and related health behaviours (particularly, substance use, smoking, poor diet). This systematic review aimed to assess the effectiveness and cost-effectiveness of interventions in adults experiencing SMD to improve oral health and related health behaviours.

METHODS AND FINDINGS

From inception to February 2023, five bibliographic databases (MEDLINE, EMBASE, PsycINFO, CINAHL, and Scopus) and grey literature were searched. Two researchers independently screened the search results. Randomized controlled trials (RCTs), comparative studies and economic evaluations were included that reported outcomes on oral health and the related health behaviours. Risk of bias was assessed and results narratively synthesized. Meta-analyses were performed where appropriate. This review was registered with PROSPERO (reg. no: CRD42020202416). Thirty-eight studies were included (published between 1991 and 2023) with 34 studies reporting about effectiveness. Most studies reported on substance use (n = 30). Interventions with a combination of housing support with substance use and mental health support such as contingent work therapy appeared to show some reduction in substance use in SMD groups. However, meta-analyses showed no statistically significant results. Most studies had short periods of follow-up and high attrition rates. Only one study reported on oral health; none reported on diet. Three RCTs reported on smoking, of which one comprising nicotine replacement with contingency management showed improved smoking abstinence at 4 weeks compared to control. Five studies with economic evaluations provided some evidence that interventions such as Housing First and enhanced support could be cost-effective in reducing substance use.

CONCLUSION

This review found that services such as housing combined with other healthcare services could be effective in improving health behaviours, particularly substance use, among SMD groups. Gaps in evidence also remain on oral health improvement, smoking, and diet. High quality studies on effectiveness with adequate power and retention are needed to address these significant health challenges in SMD populations.

Differences in Risks for Recurrent Injury and Death Among Survivors of Violence by Homeless Status

A better understanding of the unique risks for survivors of violence experiencing homelessness could enable more effective intervention methods. The aim of this study was to quantify the risks of death and reinjury for unhoused compared to housed survivors of violent injuries. This retrospective study included a cohort of patients with known housing status presenting to the Boston Medical Center Emergency Department between 2009 and 2018 with a violent penetrating injury. Cox proportional hazards regression models were used to estimate hazard ratios (HR) and 95% confidence intervals (95% CI) for the risks of all-cause mortality and violent reinjury. Of the 2330 patients included for analysis, 415 (17.8%) were unhoused at the time of index injury. Within 3 years of the index injury, there were 319 (13.9%) violent reinjuries and 55 (2.4%) deaths. Unhoused patients were more likely than housed patients to be violently reinjured by all causes (HR = 1.39, 95% CI = 1.06-1.83, p = 0.02), by stab wound (HR = 2.34, 95% CI = 1.33-4.11, p = 0.0003), and by blunt assault (HR = 1.52, 95% CI = 1.05-2.21, p = 0.03). Housed and unhoused patients were equally likely to die within 3 years of their index injury; however, unhoused patients were at greater risk of dying by homicide (HR = 2.89, 95% CI = 1.34-6.25, p = 0.006) or by a drug/alcohol overdose (HR = 2.86, 95% CI = 1.17-6.94, p = 0.02). In addition to the already high risks that all survivors of violence have for recurrent injuries, unhoused survivors of violence are at even greater risk for violent reinjury and death and fatal drug/alcohol overdose. Securing stable housing for survivors of violence experiencing homelessness, and connecting them with addiction treatment, is essential for mitigating these risks.

Pandemics Interlaced: The Impact of the COVID-19 Pandemic on the Wellbeing of Sober Living Home Residents

OBJECTIVES

This study aimed to discover how the COVID-19 pandemic altered the implementation of the social model of recovery in sober living homes (SLHs). Researchers analyzed associations between residents' feelings of interconnectedness, social service utilization, and relapse predictors throughout the pandemic. This study provides an understanding of how the COVID-19 pandemic impacted treatment of substance use disorder (SUD).

METHODS

This study used retrospective surveyed data from 105 SLH residents. Correlational analysis was used to determine the relationship between social service use, social connectivity, and relapse predictors at three different time points: February 2020, December 2020, and June 2021. Three residents underwent additional interviews.

RESULTS

There was a decline in social service utilization from February 2020 to December 2020 with an associated decline in feelings of social connectivity. From December 2020 to June 2021, there was an increase in residents' use of social services with an associated increase in connectivity. There was a significant negative correlation between relapse predictors and number of supportive services used in February 2020 ( r = -0.217, P < 0.05) and in December 2020 ( r = -0.352, P < 0.001). In June 2020, there was a significant negative correlation between interconnectedness and relapse predictors ( r = -0.297, P < 0.05). The number of interviews was not sufficient for formal qualitative analysis.

CONCLUSIONS

The results suggest the COVID-19 pandemic possibly interrupted the course of recovery in SLHs. These findings offer insight to how the pandemic impacted individuals recovering from SUD and suggest that SUD treatment professionals should develop interventions to enhance social connectivity to deploy in response to global stressors.

Effectiveness of employment-based interventions for persons experiencing homelessness: A systematic review

Employment is frequently desired by persons who experience homelessness yet is often elusive. Little is known about the range and effectiveness of employment-based interventions evaluated in existing literature on key psychosocial outcomes including employment participation, mental well-being, housing tenure, community integration and substance use. To identify and synthesise existing studies, we conducted a systematic review of effectiveness using the methodology proposed by the Joanna Briggs Institute (JBI) following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Following the removal of duplicates, we screened 13,398 titles and abstracts, and reviewed 79 studies at the full-text review stage using two independent raters. A total of 16 studies met criteria for inclusion in a narrative synthesis and were subjected to critical appraisal. The majority of studies were conducted in the US (n = 14; 87.5%) with other studies published in Canada (n = 1; 6.3%) and Australia (n = 1; 6.3%). Interventions evaluated in existing studies included combined substance use and vocational skills interventions (n = 7; 43.8%), supported employment (n = 6; 37.5%), and integrated supports including an employment component (n = 3; 18.8%). The effectiveness of these interventions on employment, mental well-being, housing tenure, community integration, and substance use is presented. Findings suggest that research evaluating employment interventions for persons who experience homelessness is in an early stage of development. Researchers and practitioners may consider collaborating with persons with lived experiences of homelessness and practitioners in co-designing and modifying existing approaches to target key outcomes more effectively. Policymakers may consider allocating resources to such initiatives to further the development of practice and research aimed at supporting persons who experience homelessness to secure and sustain employment during and following homelessness.

The Impact of Supportive Housing on Liver-Related Outcomes Among Persons With Hepatitis C Virus Infection

BACKGROUND

Hepatitis C virus (HCV) infection disproportionately impacts people experiencing homelessness. Hepatitis C virus can lead to negative health outcomes, including mortality. We evaluated the impact of a permanent supportive housing (PSH) program (ie, "treatment") on liver-related morbidity and mortality among persons with chronic homelessness and HCV infection.

METHODS

We matched records for persons eligible for a New York City PSH program (2007-2014) with Heath Department HCV and Vital Statistics registries and Medicaid claims. Among persons diagnosed with HCV before or 2 years posteligibility, we added stabilized inverse probability of treatment weights to negative binomial regression models to compare rates for liver disease-related emergency department visits and hospitalizations, and hazard ratios for mortality, by program placement 2 and 5 years posteligibility.

RESULTS

We identified 1158 of 8783 placed and 1952 of 19 019 unplaced persons with laboratory-confirmed HCV infection. Permanent supportive housing placement was associated with significantly reduced liver-related emergency department visits (adjusted rate ratio [aRR] = 0.76, 95% confidence interval [CI] = .61-.95), hospitalizations (aRR = 0.62, 95% CI = .54-.71), and all-cause (adjusted hazard ratio [aHR] = 0.65, 95% CI = .46-.92) and liver-related mortality (aHR = 0.72, 95% CI = .09-.83) within 2 years. The reduction remained significant for hospitalizations after 5 years.

CONCLUSIONS

Placement into PSH was associated with reduced liver-related morbidity and mortality among persons with HCV infection and chronic homelessness.

Examining Recovery Status Trends over 7-Years for Men and Women Clients of a Substance Use Disorder Recovery Housing Program

Adults who are homeless and/or involved in the criminal justice system have significantly higher risks of substance use disorders (SUD)s and they may have increased difficulty initiating and maintaining traditional SUD treatments. To address the needs of adults with SUDs who are homeless/criminal justice system involved the Recovery Kentucky programs were established. This study examined outcomes for this recovery housing program among an unduplicated statewide sample of men ( n=672) and women ( n = 732) clients who entered the Recovery Kentucky program and who were followed-up about 12 months after program entry across a 7-year period. Low, but similar rates of problem alcohol or illicit drug use at follow-up were found across the 7-year period. Men had higher rates of return to use than women. Further, about 40% of the clients had at least one recovery status vulnerability factor at follow-up each year of the study with no differences by gender.

The role of recovery housing during outpatient substance use treatment

BACKGROUND

Recovery housing generally refers to alcohol- and drug-free living environments that provide peer support for those wanting to initiate and sustain recovery from alcohol and other drug (AOD) disorders. Despite a growing evidence base for recovery housing, relatively little research has focused on how recovery housing may benefit individuals accessing outpatient substance use treatment.

METHODS

Using administrative and qualitative data from individuals attending an outpatient substance use treatment program in the Midwestern United States that provides recovery housing in a structured sober living environment, this mixed methods study sought to: (1) determine whether individuals who opted to live in structured sober living during outpatient treatment (N = 138) differed from those who did not (N = 842) on demographic, clinical, or service use characteristics; (2) examine whether living in structured sober living was associated with greater likelihood of satisfactory discharge and longer lengths of stay in outpatient treatment; and (3) explore what individuals (N = 7) who used the structured sober living during outpatient treatment were hoping to gain from the experience.

RESULTS

Factors associated with the use of recovery housing during outpatient treatment in multivariate models included gender, age, and receiving more services across episodes of care. Living in structured sober housing was associated with greater likelihood of satisfactory discharge and longer length of stays in outpatient treatment. Focus group participants reported needing additional structure and recovery support, with many noting that structure and accountability, learning and practicing life, coping, and other recovery skills, as well as receiving social and emotional support from others were particularly beneficial aspects of the sober living environment.

CONCLUSIONS

Findings underscore the importance of safe and supportive housing during outpatient substance use treatment as well as the need for future research on how housing environments may affect engagement, retention, and outcomes among individuals accessing outpatient substance use treatment.

Homeless Opioid Treatment Clients Transitioning to Dependent and Independent Housing: Differential Outcomes by Race/Ethnicity

Purpose: Homeless opioid treatment clients who transition into housing generally demonstrate better outcomes, but housing environments vary widely and may not benefit racial/ethnic minority populations equally. We sought to identify how race/ethnicity moderates the association between positive opioid treatment response and moving into dependent or independent living environments. Methods: We used the Treatment Episode Dataset-Discharges (2018-2019) to identify outpatient treatment clients who were homeless at admission and indicated heroin or other opioids as their primary drug of choice (n = 20,021). We defined positive treatment response as a reduction in opioid use between admission and discharge. We used multivariable logistic regression to model treatment response. We included an interaction between housing at discharge (remained homeless [reference], dependent living, or independent living) and race/ethnicity, and adjusted for relevant confounders. Results: Transitioning from homeless to dependent living was positively associated with treatment response among White (aOR = 3.57, 95% CI = 3.15-4.06), Hispanic (aOR = 2.11, 95% CI = 1.55-2.86), and Black clients (aOR = 1.79, 95% CI = 1.41-2.27), but no association was observed for homeless American Indian/Alaska Native clients. Transitioning from homeless to independent living was strongly associated with treatment response among all groups with the strongest association observed among White clients (aOR = 4.70, 95% CI = 4.26-5.19). Conclusions: Interventions aimed at improving OUD treatment outcomes among homeless clients should identify individual and structural factors that support moving into fully housed and independent living environments. Dependent living offers needed support during crises, but should be temporary and priority should be placed on independent, permanent, and autonomous living environments.

Examining Recovery Status and Supports before and after Substance Abuse Disorder Treatment Among Clients Who Experienced Lifetime and Recent Firearm-Related Threats

Firearm-related risks have often been overlooked in the sequela of substance use and substance use disorders. This study compares adult substance abuse disorder treatment (SADT) clients who experienced recent ( n = 274) and lifetime ( n = 889) firearm threats to adults who were not threatened with a firearm ( n = 2029) before and 12 months after program entry. More men experienced firearm threats (38.8%) than women (34.2%). However, among those with any firearm threats, more women (27.2%) experienced firearm threats in the year before program entry than men (20.2%). Being threatened with a firearm was associated with increased economic vulnerability, criminal justice system involvement, mental health problems, and victimization both before and after SADT program entry. A higher number of adverse childhood experiences were associated with firearm threats and particularly recent firearm threats. Results of this study underscore the importance of screening for firearm-related risks in substance abuse disorder treatment programs.

The Influence of Living Conditions on Self-Rated Health: Evidence from China

Despite growing attention to living conditions as a social determinant of health, few studies have focused on its diverse impacts on self-rated health. Using data from the China Family Panel Study in 2018, this study used logistic regression analysis to examine how living conditions affect self-rated health in China, finding that people cooking with sanitary water and clean fuel were more likely to report good health, and that homeownership was associated with higher self-rated health. The self-rated health of people living in high-quality housing was lower than that of people living in ordinary housing, and people living in tidy homes were more likely to report good health. The findings suggest that the link between multiple living conditions and self-rated health is dynamic. Public health policies and housing subsidy programs should therefore be designed based on a comprehensive account of not only housing grade or income status, but also whole dwelling conditions.

A comprehensive review of prioritised interventions to improve the health and wellbeing of persons with lived experience of homelessness

Background

Homelessness has emerged as a public health priority, with growing numbers of vulnerable populations despite advances in social welfare. In February 2020, the United Nations passed a historic resolution, identifying the need to adopt social-protection systems and ensure access to safe and affordable housing for all. The establishment of housing stability is a critical outcome that intersects with other social inequities. Prior research has shown that in comparison to the general population, people experiencing homelessness have higher rates of infectious diseases, chronic illnesses, and mental-health disorders, along with disproportionately poorer outcomes. Hence, there is an urgent need to identify effective interventions to improve the lives of people living with homelessness.

Objectives

The objective of this systematic review is to identify, appraise, and synthesise the best available evidence on the benefits and cost-effectiveness of interventions to improve the health and social outcomes of people experiencing homelessness.

Search Methods

In consultation with an information scientist, we searched nine bibliographic databases, including Medline, EMBASE, and Cochrane CENTRAL, from database inception to February 10, 2020 using keywords and MeSH terms. We conducted a focused grey literature search and consulted experts for additional studies.

Selection Criteria

Teams of two reviewers independently screened studies against our inclusion criteria. We included randomised control trials (RCTs) and quasi-experimental studies conducted among populations experiencing homelessness in high-income countries. Eligible interventions included permanent supportive housing (PSH), income assistance, standard case management (SCM), peer support, mental health interventions such as assertive community treatment (ACT), intensive case management (ICM), critical time intervention (CTI) and injectable antipsychotics, and substance-use interventions, including supervised consumption facilities (SCFs), managed alcohol programmes and opioid agonist therapy. Outcomes of interest were housing stability, mental health, quality of life, substance use, hospitalisations, employment and income.

Data Collection and Analysis

Teams of two reviewers extracted data in duplicate and independently. We assessed risk of bias using the Cochrane Risk of Bias tool. We performed our statistical analyses using RevMan 5.3. For dichotomous data, we used odds ratios and risk ratios with 95% confidence intervals. For continuous data, we used the mean difference (MD) with a 95% CI if the outcomes were measured in the same way between trials. We used the standardised mean difference with a 95% CI to combine trials that measured the same outcome but used different methods of measurement. Whenever possible, we pooled effect estimates using a random-effects model.

Main Results

The search resulted in 15,889 citations. We included 86 studies (128 citations) that examined the effectiveness and/or cost-effectiveness of interventions for people with lived experience of homelessness. Studies were conducted in the United States (73), Canada (8), United Kingdom (2), the Netherlands (2) and Australia (1). The studies were of low to moderate certainty, with several concerns regarding the risk of bias. PSH was found to have significant benefits on housing stability as compared to usual care. These benefits impacted both high- and moderate-needs populations with significant cimorbid mental illness and substance-use disorders. PSH may also reduce emergency department visits and days spent hospitalised. Most studies found no significant benefit of PSH on mental-health or substance-use outcomes. The effect on quality of life was also mixed and unclear. In one study, PSH resulted in lower odds of obtaining employment. The effect on income showed no significant differences. Income assistance appeared to have some benefits in improving housing stability, particularly in the form of rental subsidies. Although short-term improvement in depression and perceived stress levels were reported, no evidence of the long-term effect on mental health measures was found. No consistent impact on the outcomes of quality of life, substance use, hospitalisations, employment status, or earned income could be detected when compared with usual services. SCM interventions may have a small beneficial effect on housing stability, though results were mixed. Results for peer support interventions were also mixed, though no benefit was noted in housing stability specifically. Mental health interventions (ICM, ACT, CTI) appeared to reduce the number of days homeless and had varied effects on psychiatric symptoms, quality of life, and substance use over time. Cost analyses of PSH interventions reported mixed results. Seven studies showed that PSH interventions were associated with increased cost to payers and that the cost of the interventions were only partially offset by savings in medical- and social-services costs. Six studies revealed that PSH interventions saved the payers money. Two studies focused on the cost-effectiveness of income-assistance interventions. For each additional day housed, clients who received income assistance incurred additional costs of US$45 (95% CI, -$19, -$108) from the societal perspective. In addition, the benefits gained from temporary financial assistance were found to outweigh the costs, with a net savings of US$20,548. The economic implications of case management interventions (SCM, ICM, ACT, CTI) was highly uncertain. SCM clients were found to incur higher costs than those receiving the usual care. For ICM, all included studies suggested that the intervention may be cost-offset or cost-effective. Regarding ACT, included studies consistently revealed that ACT saved payers money and improved health outcomes than usual care. Despite having comparable costs (US$52,574 vs. US$51,749), CTI led to greater nonhomeless nights (508 vs. 450 nights) compared to usual services.

Authors' Conclusions

PSH interventions improved housing stability for people living with homelessness. High-intensity case management and income-assistance interventions may also benefit housing stability. The majority of included interventions inconsistently detected benefits for mental health, quality of life, substance use, employment and income. These results have important implications for public health, social policy, and community programme implementation. The COVID-19 pandemic has highlighted the urgent need to tackle systemic inequality and address social determinants of health. Our review provides timely evidence on PSH, income assistance, and mental health interventions as a means of improving housing stability. PSH has major cost and policy implications and this approach could play a key role in ending homelessness. Evidence-based reviews like this one can guide practice and outcome research and contribute to advancing international networks committed to solving homelessness.

Accommodation-based interventions for individuals experiencing, or at risk of experiencing, homelessness

Background

Globally, almost 1.6 billion individuals lack adequate housing. Many accommodation-based approaches have evolved across the globe to incorporate additional support and services beyond delivery of housing.

Objectives

This review examines the effectiveness of accommodation-based approaches on outcomes including housing stability, health, employment, crime, wellbeing, and cost for individuals experiencing or at risk of experiencing homelessness.

Search Methods

The systematic review is based on evidence already identified in two existing EGMs commissioned by the Centre for Homelessness Impact (CHI) and built by White et al. The maps were constructed using a comprehensive three stage search and mapping process. Stage one mapped included studies in an existing systematic review on homelessness, stage two was an extensive search of 17 academic databases, three EGM databases, and eight systematic review databases. Finally stage three included web searches for grey literature, scanning reference lists of included studies and consultation with experts to identify additional literature. We identified 223 unique studies across 551 articles from the effectiveness map on 12th April 2019.

Selection Criteria

We include research on all individuals currently experiencing, or at risk of experiencing homelessness irrespective of age or gender, in high-income countries. The Network Meta-Analysis (NMA) contains all study designs where a comparison group was used. This includes randomised controlled trials (RCTs), quasi-experimental designs, matched comparisons and other study designs that attempt to isolate the impact of the intervention on homelessness. The NMA primarily addresses how interventions can reduce homelessness and increase housing stability for those individuals experiencing, or at risk of experiencing, homelessness. Additional outcomes are examined and narratively described. These include: access to mainstream healthcare; crime and justice; employment and income; capabilities and wellbeing; and cost of intervention. These outcomes reflect the domains used in the EGM, with the addition of cost.

Data Collection and Analysis

Due to the diverse nature of the literature on accommodation-based approaches, the way in which the approaches are implemented in practice, and the disordered descriptions of the categories, the review team created a novel typology to allow meaningful categorisations for functional and useful comparison between the various intervention types. Once these eligible categories were identified, we undertook dual data extraction, where two authors completed data extraction and risk of bias (ROB) assessments independently for each study. NMA was conducted across outcomes related to housing stability and health.Qualitative data from process evaluations is included using a "Best Fit" Framework synthesis. The purpose of this synthesis is to complement the quantitative evidence and provide a better understanding of what factors influenced programme effectiveness. All included Qualitative data followed the initial framework provided by the five main analytical categories of factors of influence (reflected in the EGM), namely: contextual factors, policy makers/funders, programme administrators/managers/implementing agencies, staff/case workers and recipients of the programme.

Main Results

There was a total of 13,128 people included in the review, across 51 reports of 28 studies. Most of the included studies were carried out in the United States of America (25/28), with other locations including Canada and the UK. Sixteen studies were RCTs (57%) and 12 were nonrandomised (quasi-experimental) designs (43%). Assessment of methodological quality and potential for bias was conducted using the second version of the Cochrane Risk of Bias tool for Randomised controlled trials. Nonrandomised studies were coded using the ROBINS- I tool. Out of the 28 studies, three had sufficiently low ROB (11%), 11 (39%) had moderate ROB, and five (18%) presented serious problems with ROB, and nine (32%) demonstrated high, critical problems with their methodology. A NMA on housing stability outcomes demonstrates that interventions offering the highest levels of support alongside unconditional accommodation (High/Unconditional) were more effective in improving housing stability compared to basic support alongside unconditional housing (Basic/Unconditional) (ES=1.10, 95% confidence interval [CI] [0.39, 1.82]), and in comparison to a no-intervention control group (ES=0.62, 95% CI [0.19, 1.06]). A second NMA on health outcomes demonstrates that interventions categorised as offering Moderate/Conditional (ES= 0.36, 95% CI [0.03, 0.69]) and High/Unconditional (ES = 0.22, 95% CI [0.01, 0.43]) support were effective in improving health outcomes compared to no intervention. These effects were smaller than those observed for housing stability. The quality of the evidence was relatively low but varied across the 28 included studies. Depending on the context, finding accommodation for those who need it can be hindered by supply and affordability in the market. The social welfare approach in each jurisdiction can impact heavily on support available and can influence some of the prejudice and stigma surrounding homelessness. The evaluations emphasised the need for collaboration and a shared commitment between policymakers, funders and practitioners which creates community and buy in across sectors and agencies. However, co-ordinating this is difficult and requires sustainability to work. For those implementing programmes, it was important to invest time in developing a culture together to build trust and solid relationships. Additionally, identifying sufficient resources and appropriate referral routes allows for better implementation planning. Involving staff and case workers in creating processes helps drive enthusiasm and energy for the service. Time should be allocated for staff to develop key skills and communicate engage effectively with service users. Finally, staff need time to develop trust and relationships with service users; this goes hand in hand with providing information that is up to date and useful as well making themselves accessible in terms of location and time.

Authors' Conclusions

The network meta-analysis suggests that all types of accommodation which provided support are more effective than no intervention or Basic/Unconditional accommodation in terms of housing stability and health. The qualitative evidence synthesis raised a primary issue in relation to context: which was the lack of stable, affordable accommodation and the variability in the rental market, such that actually sourcing accommodation to provide for individuals who are homeless is extremely challenging. Collaboration between stakeholders and practitioners can be fruitful but difficult to coordinate across different agencies and organisations.

Evidence-informed interventions and best practices for supporting women experiencing or at risk of homelessness: a scoping review with gender and equity analysis

INTRODUCTION

While much of the literature on homelessness is centred on the experience of men, women make up over one-quarter of Canada's homeless population. Research has shown that women experiencing homelessness are often hidden (i.e. provisionally housed) and have different pathways into homelessness and different needs as compared to men. The objective of this research is to identify evidence-based interventions and best practices to better support women experiencing or at risk of homelessness.

METHODS

We conducted a scoping review with a gender and equity analysis. This involved searching MEDLINE, CINAHL, PsycINFO and other databases for systematic reviews and randomized trials, supplementing our search through reference scanning and grey literature, followed by a qualitative synthesis of the evidence that examined gender and equity considerations.

RESULTS

Of the 4102 articles identified on homelessness interventions, only 4 systematic reviews and 9 randomized trials were exclusively conducted on women or published disaggregated data enabling a gender analysis. Interventions with the strongest evidence included post-shelter advocacy counselling for women experiencing homelessness due to intimate partner violence, as well as case management and permanent housing subsidies (e.g. tenant-based rental assistance vouchers), which were shown to reduce homelessness, food insecurity, exposure to violence and psychosocial distress, as well as promote school stability and child well-being.

CONCLUSION

Much of the evidence on interventions to better support women experiencing homelessness focusses on those accessing domestic violence or family shelters. Since many more women are experiencing or at risk of hidden homelessness, population-based strategies are also needed to reduce gender inequity and exposure to violence, which are among the main structural drivers of homelessness among women.

The Relationship Between Housing Status and Substance Use and Sexual Risk Behaviors Among People Currently Seeking or Receiving Services in Substance Use Disorder Treatment Programs

Although HIV risk behaviors such as substance use and condomless sex are prevalent among people currently seeking or receiving services at substance use disorder (SUD) treatment programs, associations with housing status in this population have not been well studied. We examined the associations between housing status, substance use and HIV-related sexual risk behaviors among 1281 participants from 12 US community-based SUD programs. In addition, substance use was examined as a potential mediator of the relationship between housing status and sexual risk behaviors. We conducted Chi-square, univariate and multivariate logistic regression models on data from the National Drug Abuse Treatment Clinical Trials Network HIV Rapid Testing and Counseling study. Path analysis was used to test the mediation and indirect effects. Unstable housing was significantly associated with having multiple concurrent condomless sex partners, condomless sex with non-primary partners, and partners of unknown HIV serostatus. Homelessness was significantly associated with condomless vaginal sex and condomless sex with any substance use. The path between unstable housing and sexual risk behaviors was mediated by problematic drug use, particularly by cocaine, opioids, and marijuana use. Because housing status impacts HIV risk behaviors for individuals in SUD treatment programs, both housing status and substance use behaviors should be assessed upon program entry in order to identify and mitigate risk behaviors.

Examining Recovery Program Participants by Gender: Program Completion, Relapse, and Multidimensional Status 12 Months After Program Entry

This study examined individual-level characteristics and factors associated with program completion, relapse, and multidimensional status at follow-up for 213 men and 248 women who entered one of 17 peer-led recovery programs and who completed a follow-up interview 12 months later. Study results found that although there were some significant gender differences at program entry among participants entering Recovery Kentucky, there were few gender differences at follow-up. In addition, although participants had significant psychosocial problems, polysubstance use patterns, and severe substance use disorder (SUD), the majority of both men and women reported completing the program (80.3%), a small minority reported relapse (9.5%), and about one third had worse multidimensional status about 12 months after program entry. Lower quality of life rating at program entry was associated with program completion and with better multidimensional status at follow-up. Study results suggest the recovery program provides an important option for some of the most vulnerable individuals with SUD.

Opioid-related deaths in Europe: Strategies for a comprehensive approach to address a major public health concern

Use of illicit opioids and misuse of prescription opioids are the main causes of drug-related deaths across the world, and the continuing rise in opioid-related mortality, especially affecting North America, Australia and Europe, is a public health challenge. Strategies that may help to decrease the high levels of opioid-related mortality and morbidity and improve care across Europe include risk assessment and interventions to improve the use of opioid analgesics, e.g. prescription drug-monitoring programmes, education on pain management to reduce opioid prescribing, and the implementation of evidence-based primary prevention programmes to reduce the demand for opioids. For patients who develop opioid use disorder (a chronic and relapsing problematic use of opioids that causes clinical impairment or distress), treatment combining opiate receptor full or partial agonist medications for opioid-use disorder (MOUD) with psychosocial interventions is essential. However, in Europe a substantial proportion of the 1.3 million high-risk opioid users (defined as injecting drug use or regular use of opioids, mainly heroin) remain outside of dedicated treatment programmes. More widespread and easier access to MOUD could reduce mortality levels; via approaches such as primary care-led treatment models, and efforts to improve patient retention and adherence to treatment programmes. Other harm-reduction strategies, such as the use of MOUD at optimal doses, the provision of take-home naloxone, the introduction of supervised drug-consumption facilities, and patient education to reduce the risk of overdose may also be beneficial.

A Randomized Controlled Trial of a Rapid Re-housing Intervention for Homeless Persons Living with HIV/AIDS: Impact on Housing and HIV Medical Outcomes

We conducted a randomized controlled trial to determine whether, for homeless persons living with HIV/AIDS (PLWHA), rapid re-housing can improve housing and HIV viral suppression more than standard housing assistance. We recruited 236 PLWHA from HIV emergency housing in New York City (NYC) and randomized them to: (1) Enhanced Housing Placement Assistance (EHPA), i.e., immediate assignment to a case manager to rapidly re-house the client and provide 12 months of case management or (2) usual services, i.e., referral to an NYC housing placement program for which all HIV emergency housing residents were eligible. We compared time to stable housing placement and percentage virally suppressed from baseline to 12 months. EHPA clients were placed faster than usual services clients (p = 0.02; 25% placed by 150 days vs. 243 days, respectively), more likely to be placed [adjusted hazards ratio = 1.8; 95% confidence interval(CI) 1.1-2.8], and twice as likely to achieve or maintain suppression (adjusted odds ratio 2.1; 95% CI 1.1-4.0).

Preliminary results from Brazil's first recovery housing program

Abstract Introduction: The recovery housing (RH) program was initiated in São Paulo with the objective of providing treatment for substance use disorders and addressing users’ housing and employment problems. The purpose of this study was to describe the model based on its first 11 months of operation, it was launched in June 2016 in Brazil. Method: We carried out a retrospective analysis of the records of all subjects treated in the RH of the Restart Program (Programa Recomeço) since its creation, from June 2016 to May 2017. Results: Sixty-nine subjects were included. Thirty-five (51%) remained in the household until the end of treatment or were reinserted in society. Thirty-four (49%) presented recurrence during their stay, of which 16 (47%) volunteered for treatment in a therapeutic community or psychiatric hospital, 8 (23.5%) chose to continue with outpatient treatment only, 6 (17.7%) returned to their families and continued to receive outpatient treatment, and 4 (11.8%) discontinued the treatment. Of the 35 subjects who completed the RH program, 28 (80%) were in employment and 7 (20%) received governmental support for permanent disability on medical or psychiatric grounds. Conclusion: RH can be an important component of integrated care and is used in several countries. Although controversial, the use of urine tests to control relapse seems to have a positive impact on adherence to treatment and maintenance of abstinence. These preliminary findings corroborate, with clear limitations, the evidence available in the literature showing that RH programs are effective for the treatment of addictions.

Long-Term Supportive Housing is Associated with Decreased Risk for New HIV Diagnoses Among a Large Cohort of Homeless Persons in New York City

It is unknown whether providing housing to persons experiencing homelessness decreases HIV risk. Housing, including access to preventive services and counseling, might provide a period of transition for persons with HIV risk factors. We assessed whether the new HIV diagnosis rate was associated with duration of supportive housing. We linked data from a cohort of 21,689 persons without a previous HIV diagnosis who applied to a supportive housing program in New York City (NYC) during 2007-2013 to the NYC HIV surveillance registry. We used time-dependent Cox modeling to compare new HIV diagnoses among recipients of supportive housing (defined a priori, for program evaluation purposes, as persons who spent > 7 days in supportive housing; n = 6447) and unplaced applicants (remainder of cohort), after balancing the groups on baseline characteristics with propensity score weights. Compared with unplaced applicants, persons who received ≥ 3 continuous years of supportive housing had decreased risk for new HIV diagnosis (HR 0.10; CI 0.01-0.99). Risk of new HIV diagnosis decreased with longer duration placement in supportive housing. Supportive housing might aid in primary HIV prevention.

Feasibility and Effects of Digital Interventions to Support People in Recovery From Substance Use Disorders: Systematic Review

Background

The development and evaluation of digital interventions aimed at preventing or treating substance use–related problems and disorders is a rapidly growing field. Previous reviews of such interventions reveal a large and complex picture with regard to targeted users, use, and efficacy.

Objective

The objective of this review was to investigate the feasibility and effects of interventions developed specifically for digital platforms. These interventions are focused on supporting people in recovery from substance use disorders by helping them achieve their substance use goals and develop a more satisfying life situation.

Methods

The review is based on a systematic search in MEDLINE, Embase, PsycInfo, and Cochrane Library databases. Of the 1149 identified articles, 722 were excluded as obviously not relevant. Of the remaining articles, 21 were found to be previous reviews, 269 were on interventions aimed at reducing hazardous alcohol or cannabis use, and 94 were on digitized versions of standard treatment methods. The remaining 43 articles were all read in full and systematically scored by both authors.

Results

The 43 articles cover 28 unique interventions, of which 33 have been published after 2013. The interventions are aimed at different target groups (defined by age, substance, or comorbidity). Based on the number of features or modules, the interventions can be categorized as simple or complex. Fourteen of the 18 simple interventions and 9 of the 10 complex interventions have been studied with quantitative controlled methodologies. Thirteen of the 18 simple interventions are integrated in other treatment or support systems, mainly delivered as mobile phone apps, while 6 of the 10 complex interventions are designed as stand-alone interventions, most often delivered on a platform combining desktop/Web and mobile phone technologies. The interventions were generally easy to implement, but in most cases the implementation of the complex interventions was found to be dependent on sustained organizational support. Between 70% and 90% of the participants found the interventions to be useful and easy to use. The rates of sustained use were also generally high, except for simple interventions with an open internet-based recruitment and some information and education modules of the complex interventions. Across all interventions, slightly more than half (55%) of the studies with control groups generated positive findings on 1 or more substance use outcomes, with 57% of the interventions also found to be efficacious in 1 or more studies. In the positive studies, effects were typically in the small to moderate range, with a few studies yielding larger effects. Largely due to the inclusion of stronger control conditions, studies of simple interventions were less likely to produce positive effects.

Conclusions

The digital interventions included in this review are in general feasible but are not consistently effective in helping people in recovery from substance use disorder reduce their substance use or achieving other recovery goals.

A pilot test of a motivational interviewing social network intervention to reduce substance use among housing first residents

This article presents findings of a pilot test of a Motivational Interviewing social network intervention (MI-SNI) to enhance motivation to reduce high risk alcohol and other drug (AOD) use among formerly homeless individuals transitioning to housing. Delivered in-person by a facilitator trained in MI, this four-session computer-assisted intervention provides personalized social network visualization feedback to help participants understand the people in their network who trigger their alcohol and other drug (AOD) use and those who support abstinence. If ready, participants are encouraged to make changes to their social network to help reduce their own high-risk behavior. Participants were 41 individuals (33 male, 7 female, 1 other; 23 African-American, 5 non-Latino White, 6 Latino, 7 other, mean age 48) who were transitioning from homelessness to permanent supportive housing. They were randomly assigned to either the MI-SNI condition or usual care. Readiness to change AOD use, AOD abstinence self-efficacy, and AOD use were assessed at baseline and shortly after the final intervention session for the MI-SNI arm and around 3-months after baseline for the control arm. Acceptability of the intervention was also evaluated. MI-SNI participants reported increased readiness to change AOD use compared to control participants. We also conducted a subsample analysis for participants at one housing program and found a significant intervention effect on readiness to change AOD use, AOD abstinence self-efficacy, and alcohol use compared to control participants. Participants rated the intervention as highly acceptable. We conclude that a brief computer-assisted Motivational Interviewing social network intervention has potential to efficaciously impact readiness to change AOD use, AOD abstinence self-efficacy, and AOD use among formerly homeless individuals transitioning to permanent supportive housing, and warrants future study in larger clinical trials.

Homelessness predicts attrition but not alcohol abstinence in outpatients experiencing co-occurring alcohol dependence and serious mental illness

BACKGROUND

Adults experiencing homelessness and serious mental illnesses (SMI) are at an increased risk of poor mental health and treatment outcomes compared with stably housed adults with SMI. The additional issue of alcohol misuse further complicates the difficulties of those living with homelessness and SMI. In this secondary data analysis, the authors investigated the impact of homelessness on attrition and alcohol use in a contingency management (CM) intervention that rewarded alcohol abstinence in outpatients with SMI.

METHODS

The associations between housing status and attrition and alcohol abstinence during treatment, as assessed by ethyl glucuronide (EtG) urine tests, were evaluated in 79 adults diagnosed with alcohol dependence and SMI.

RESULTS

Thirty-nine percent (n = 31) of participants reported being homeless at baseline. Individuals who were homeless were more likely to drop out of CM (n = 10, 62.5%) than those who were housed (n = 4, 16.7%), χ²(1) = 8.86, P < .05. Homelessness was not associated with attrition in the noncontingent control group. Accounting for treatment group and prerandomization EtG levels, neither the effect of housing status nor the interaction of housing status and group were associated with EtG-assessed alcohol abstinence during treatment.

CONCLUSIONS

Individuals experiencing homelessness and co-occurring alcohol dependence and SMI receiving CM had higher rates of attrition, relative to those who were housed. Homelessness was not associated with differences in biologically assessed alcohol abstinence.

Housing Status, Psychiatric Symptoms, and Substance Abuse Outcomes Among Sober Living House Residents over 18 Months

Studies show individuals entering sober living recovery houses (SLHs) make significant, sustained improvement on measures of substance abuse problems, employment, and arrests. The current study assessed changes in housing status among SLH residents over 18 months and the relative influences of housing status and psychiatric distress on substance abuse outcomes. Two hundred forty one men and 58 women, all age 18 and older, were interviewed within their first week of entering 20 SLHs and again at 6-, 12-, and 18-month follow-up. Between entry into the SLHs and 18-month follow-up homelessness declined from 16% to 4%, marginal housing declined from 66% to 46%, and stable housing increased from 13% to 27%. Psychiatric severity was generally mild to moderate in severity, but nevertheless showed improvement over the 18-month study period. Multivariate models showed worse substance abuse outcomes for residents with higher psychiatric distress and unstable housing. Relative to persons with stable housing, those who were homeless or marginally housed had worse outcomes and those in SLHs had better outcomes. Overall, we conclude that individuals entering SLHs show improvement in housing status and psychiatric distress, both of which are associated with better substance abuse outcomes.

Housing First and harm reduction: a rapid review and document analysis of the US and Canadian open-access literature

BACKGROUND

Housing First is an evidence-based practice intended to serve chronically homeless individuals with co-occurring serious mental illness and substance use disorders. Despite housing active substance users, harm reduction is an often-overlooked element during the Housing First implementation process in real-world settings. In this paper, we explore the representation of the Housing First model within the open-access scholarly literature as a potential contributing factor for this oversight.

METHODS

We conducted a rapid review of the US and Canadian open-access Housing First literature. We followed a document analysis approach, to form an interpretation of the articles' content related to our primary research questions.

RESULTS

A total of 55 articles on Housing First were included in the final analysis. Only 21 of these articles (38.1%) included explicit mention of harm reduction. Of the 34 articles that did not discuss harm reduction, 22 provided a description of the Housing First model indicating it does not require abstinence from substance use; however, descriptions did not all clearly indicate abstinence was not required beyond program entry. Additional Housing First descriptions focused on the low-barrier entry criteria and/or the intervention's client-centeredness.

CONCLUSIONS

Our review demonstrated a lack of both explicit mention and informed discussion of harm reduction in the Housing First literature, which is likely contributing to the Housing First research-practice gap to some degree. Future Housing First literature should accurately explain the role of harm reduction when discussing it in the context of Housing First programming, and public agencies promoting Housing First uptake should provide resources for proper implementation and monitor program fidelity to prevent model drift.

Contingency Management: New Directions and Remaining Challenges for An Evidence-Based Intervention

This article introduces the special issue on contingency management (CM), an efficacious intervention for the treatment of substance use disorders with low uptake in clinical settings that is not commensurate with evidence for efficacy. In this special issue of the Journal of Substance Abuse Treatment, we present 16 articles representing the latest research in efficacy, implementation, and technological advances related to CM. Combined, this collection of articles highlights the diverse populations, settings, and applications of CM in the treatment of substance use disorders. We conclude by highlighting directions for future research, particularly those that may increase CM's appeal and uptake in routine clinical care.

The effects of the therapeutic workplace and heavy alcohol use on homelessness among homeless alcohol-dependent adults

BACKGROUND

A clinical trial demonstrated that a therapeutic workplace could promote alcohol abstinence in homeless, alcohol-dependent adults. This secondary-data analysis examined rates of homelessness and their relation to the therapeutic workplace intervention and alcohol use during the trial.

METHODS

In the trial, homeless, alcohol-dependent adults could work in a therapeutic workplace for 6 months and were randomly assigned to Unpaid Training, Paid Training, or Contingent Paid Training groups. Unpaid Training participants were not paid for working. Paid Training participants were paid for working. Contingent Paid Training participants were paid for working if they provided alcohol-negative breath samples. Rates of homelessness during the study were calculated for each participant and the three groups were compared. Mixed-effects regression models were conducted to examine the relation between alcohol use (i.e., heavy drinking, drinks per drinking day, and days of alcohol abstinence) and homelessness.

RESULTS

Unpaid Training, Paid Training, and Contingent Paid Training participants did not differ in the percentage of study days spent homeless (31%, 28%, 17%; respectively; F(2,94)=1.732, p=0.183). However, participants with more heavy drinking days (b=0.350, p<0.001), more drinks per drinking day (b=0.267, p<0.001), and fewer days of alcohol abstinence (b=-0.285, p<0.001) spent more time homeless.

CONCLUSIONS

Reducing heavy drinking and alcohol use may help homeless, alcohol-dependent adults transition out of homelessness.

Substance Abuse Treatment Patients in Housing Programs Respond to Contingency Management Interventions

Use of homeless and transitional housing (e.g., recovery homes) programs can be associated with success in substance abuse treatment, perhaps because many of these programs encourage or mandate sobriety. In this study, we examined whether contingency management (CM) protocols that use tangible incentives for submission of drug-free specimens or other specific behaviors are effective for treatment-seeking substance abusers whose behavior may also be shaped by housing programs. Of 355 participants in randomized trials of CM, 56 (16%) reported using transitional housing during the 12-week treatment period. Main and interaction effects of housing status and treatment condition were evaluated for the primary substance abuse treatment outcomes: a) longest duration of abstinence from alcohol, cocaine, and opioids, b) percentage of samples submitted that were negative for these substances, and c) treatment retention. After controlling for demographic and clinical characteristics, those who accessed housing programs submitted a higher percentage of negative samples (75%) compared to those who did not access housing programs (67%). Housing status groups did not differ in terms of longest duration of abstinence (accessed housing: M=3.1 weeks, SE=0.6; did not access housing: M=3.9 weeks, SE=0.3) or retention in substance abuse treatment (accessed housing: M=6.4 weeks, SE=0.6; did not access housing: M=6.6 weeks, SE=0.3). Regardless of housing status, CM was associated with longer durations of abstinence and treatment retention. No interactive effects of housing and treatment condition were observed (p>.05). Results suggest that those who accessed housing programs during substance abuse treatment benefit from CM to a comparable degree as their peers who did not use such programs. These effects suggest that CM remains appropriate for those accessing housing in community-based programs.

The Role of Recovery Housing: Prioritizing Choice in Homeless Services

Housing options for people exiting homelessness and seeking recovery from substance use disorders are limited. Policies tend to favor low-demand models such as housing first and permanent supportive housing that do not require abstinence, but offer immediate housing placement based on consumer choice and separate housing from clinical services. While these models have proven effective in promoting housing retention, especially among individuals with a primary diagnosis of mental illness, evidence to support positive outcomes related to people with a primary or co-occurring substance use disorder are mixed. Recovery housing models provide abstinence-focused environments and integrated peer support embedded within a recovery framework. Various models exist along a continuum from fully peer-run to clinically staffed residences. However, this continuum is typically separate from the homeless services system, and many barriers to integration persist. Recent national dialogues have begun to explore opportunities to integrate housing and substance use recovery approaches to meet the needs of people who need both types of support. This perspective paper argues that recovery housing is essential for supporting some homeless individuals and families. Within a comprehensive continuum based on choice, both recovery housing and low-demand models can support housing retention, reduce homelessness, promote recovery, and foster self-determination.

A computer-assisted motivational social network intervention to reduce alcohol, drug and HIV risk behaviors among Housing First residents

BACKGROUND

Individuals transitioning from homelessness to housing face challenges to reducing alcohol, drug and HIV risk behaviors. To aid in this transition, this study developed and will test a computer-assisted intervention that delivers personalized social network feedback by an intervention facilitator trained in motivational interviewing (MI). The intervention goal is to enhance motivation to reduce high risk alcohol and other drug (AOD) use and reduce HIV risk behaviors.

METHODS/DESIGN

In this Stage 1b pilot trial, 60 individuals that are transitioning from homelessness to housing will be randomly assigned to the intervention or control condition. The intervention condition consists of four biweekly social network sessions conducted using MI. AOD use and HIV risk behaviors will be monitored prior to and immediately following the intervention and compared to control participants' behaviors to explore whether the intervention was associated with any systematic changes in AOD use or HIV risk behaviors.

DISCUSSION

Social network health interventions are an innovative approach for reducing future AOD use and HIV risk problems, but little is known about their feasibility, acceptability, and efficacy. The current study develops and pilot-tests a computer-assisted intervention that incorporates social network visualizations and MI techniques to reduce high risk AOD use and HIV behaviors among the formerly homeless. CLINICALTRIALS.

GOV IDENTIFIER

NCT02140359.

Treatment Attendance Among Veterans With Depression, Substance Use Disorder, and Trauma

OBJECTIVE

Low attendance in psychotherapy, particularly among individuals with comorbid disorders, is a pervasive challenge. The present study examined predictors of treatment attendance in a sample of veterans with depression, substance use disorder, and trauma.

METHODS

This is an analysis of data collected as part of a larger clinical trial involving outpatients at a Veterans Administration dual diagnosis clinic. Individuals were excluded if they had significant memory deficits, schizophrenia, bipolar disorder, or substantial travel constraints. Participants (N = 146) received 12 weeks of group-delivered integrated cognitive behavioral therapy for depression and substance use, followed by randomization to 12 additional weeks of individually delivered cognitive behavioral therapy (n = 62) or cognitive processing therapy (n = 61) modified to address substance use and trauma. Participants, therapists, and researchers were not blinded to group assignment. For this study, we included only the 123 participants who were randomized into the second phase, analyzing predictors of treatment attendance categorized into predisposing factors, enabling factors, and need factors.

RESULTS

Participants were primarily male (89%) and Caucasian (76%) and averaged 47 years old (SD = 12). Forty-four percent had alcohol use disorder, 16% had drug use disorder, and 40% had polysubstance use disorder. Most met criteria for PTSD (82%), with 44% having combat-related trauma, 33% sexual trauma, and 28% other trauma. Treatment attendance did not differ between groups. More education was associated with increased group (r = .19, p = .04) and individual session attendance (r = .28, p = .002). Individuals with chronic housing problems attended fewer group sessions (r = -.19, p = .04), while individuals with sexual trauma, compared to those with other traumas, attended more individual sessions (r = .23, p = .01). Number of group sessions attended was positively associated with individual session attendance.

CONCLUSIONS

Few variables were significantly predictive of treatment attendance, possibly due to the complex nature of comorbid disorders. Including a focus on trauma was not associated with lower attendance. Special consideration may need to be given to education level, homelessness, and trauma when trying to engage and retain patients with comorbid disorders in treatment. This clinical trial is registered at www.clinicaltrials.gov as NCT00958217.

Challenges and Rewards of Conducting Research on Recovery Residences for Alcohol and Drug Disorders

Although research shows treatment for alcohol and drug problems can be effective, persons without stable housing that supports recovery are at risk for relapse. Recovery residences (RRs) for drug and alcohol problems are a growing response to the need for alcohol- and drug-free living environments that support sustained recovery. Research on RRs offers an opportunity to examine how integration of these individuals into a supportive, empowering environment has beneficial impacts on substance use, housing, and other outcomes, as well as benefits for the surrounding community. Research can also lead to the identification of operations and practices within houses that maximize favorable outcomes for residents. However, research on RRs also presents significant obstacles and challenges. Based on our experiences conducting recovery home research for decades, we present suggestions for addressing some of the unique challenges encountered in this type of research.

Co-occurring Substance Abuse and Mental Health Problems among Homeless Persons: Suggestions for Research and Practice

Communities throughout the U.S. are struggling to find solutions for serious and persistent homelessness. Alcohol and drug problems can be causes and consequences of homelessness, as well as co-occurring problems that complicate efforts to succeed in finding stable housing. Two prominent service models exist, one known as "Housing First" takes a harm reduction approach and the other known as the "linear" model typically supports a goal of abstinence from alcohol and drugs. Despite their popularity, the research supporting these models suffers from methodological problems and inconsistent findings. One purpose of this paper is to describe systematic reviews of the homelessness services literature, which illustrate weaknesses in research designs and inconsistent conclusions about the effectiveness of current models. Problems among some of the seminal studies on homelessness include poorly defined inclusion and exclusion criteria, inadequate measures of alcohol and drug use, unspecified or poorly implemented comparison conditions, and lack of procedures documenting adherence to service models. Several recent papers have suggested broader based approaches for homeless services that integrate alternatives and respond better to consumer needs. Practical considerations for implementing a broader system of services are described and peer managed recovery homes are presented as examples of services that address some of the gaps in current approaches. Three issues are identified that need more attention from researchers: 1) improving upon the methodological limitations in current studies, 2) assessing the impact of broader based, integrated services on outcome, and 3) assessing approaches to the service needs of homeless persons involved in the criminal justice system.

Tobacco-, alcohol-, and drug-attributable deaths and their contribution to mortality disparities in a cohort of homeless adults in Boston

OBJECTIVES

We quantified tobacco-, alcohol-, and drug-attributable deaths and their contribution to mortality disparities among homeless adults.

METHODS

We ascertained causes of death among 28 033 adults seen at the Boston Health Care for the Homeless Program in 2003 to 2008. We calculated population-attributable fractions to estimate the proportion of deaths attributable to tobacco, alcohol, or drug use. We compared attributable mortality rates with those for Massachusetts adults using rate ratios and differences.

RESULTS

Of 1302 deaths, 236 were tobacco-attributable, 215 were alcohol-attributable, and 286 were drug-attributable. Fifty-two percent of deaths were attributable to any of these substances. In comparison with Massachusetts adults, tobacco-attributable mortality rates were 3 to 5 times higher, alcohol-attributable mortality rates were 6 to 10 times higher, and drug-attributable mortality rates were 8 to 17 times higher. Disparities in substance-attributable deaths accounted for 57% of the all-cause mortality gap between the homeless cohort and Massachusetts adults.

CONCLUSIONS

In this clinic-based cohort of homeless adults, over half of all deaths were substance-attributable, but this did not fully explain the mortality disparity with the general population. Interventions should address both addiction and non-addiction sources of excess mortality.

Mental illness and housing outcomes among a sample of homeless men in an Australian urban centre

OBJECTIVE

The over-representation of mental illness among homeless people across the globe is well documented. However, there is a dearth of Australian literature on the mental health needs of homeless individuals. Furthermore, longitudinal research examining the factors that contribute to better housing outcomes among this population is sparse. The aim of this research is to describe the mental illness profile of a sample of homeless men in an Australian urban centre (in Sydney) and examine the factors associated with better housing outcomes at 12-month follow-up.

METHODS

A longitudinal survey was administered to 253 homeless men who were involved in the Michael Project: a 3-year initiative which combined existing accommodation support services with assertive case management and access to coordinated additional specialist allied health and support services. A total of 107 participants were followed up 12 months later. The survey examined the demographics of the sample and lifetime mental disorder diagnoses, and also included psychological screeners for current substance use and dependence, psychological distress, psychosis, and post-traumatic stress.

RESULTS

Consistent with existing literature, the prevalence of mental illness was significantly greater amongst this sample than the general Australian population. However, mental illness presentation was not associated with housing situation at 12-month follow-up. Instead, type of support service at baseline was the best predictor of housing outcome, wherein participants who received short to medium-term accommodation and support were significantly more likely to be housed in stable, long-term housing at the 12-month follow-up than participants who received outreach or emergency accommodation support.

CONCLUSIONS

This study provides evidence to support an innovative support model for homeless people in Australia and contributes to the limited Australian research on mental illness in this population.

A comparison of three interventions for homeless youth evidencing substance use disorders: results of a randomized clinical trial

While research on homeless adolescents and young adults evidencing substance use disorder is increasing, there is a dearth of information regarding effective interventions, and more research is needed to guide those who serve this population. The current study builds upon prior research showing promising findings of the community reinforcement approach (CRA) (Slesnick, Prestopnik, Meyers, & Glassman, 2007). Homeless adolescents and young adults between the ages of 14 to 20 years were randomized to one of three theoretically distinct interventions: (1) CRA (n = 93), (2) motivational enhancement therapy (MET, n = 86), or (3) case management (CM, n = 91). The relative effectiveness of these interventions was evaluated at 3, 6, and 12 months post-baseline. Findings indicated that substance use and associated problems were significantly reduced in all three interventions across time. Several moderating effects were found, especially for sex and history of childhood abuse. Findings show little evidence of superiority or inferiority of the three interventions and suggest that drop-in centers have choices for addressing the range of problems that these adolescents and young adults face.

Effectiveness of secondary prevention and treatment interventions for crack-cocaine abuse: a comprehensive narrative overview of English-language studies

There are an estimated several million crack-cocaine users globally; use is highest in the Americas. Most crack users are socio-economically marginalized (e.g., homeless), and feature elevated risks for morbidity (e.g., blood-borne viruses), mortality and crime/violence involvement, resulting in extensive burdens. No comprehensive reviews of evidence-based prevention and/or treatment interventions specifically for crack use exist. We conducted a comprehensive narrative overview of English-language studies on the efficacy of secondary prevention and treatment interventions for crack (cocaine) abuse/dependence. Literature searches (1990-2014) using pertinent keywords were conducted in main scientific databases. Titles/abstracts were reviewed for relevance, and full studies were included in the review if involving a primary prevention/treatment intervention study comprising a substantive crack user sample. Intervention outcomes considered included drug use, health risks/status (e.g., HIV or sexual risks) and select social outcome indicators. Targeted (e.g., behavioral/community-based) prevention measures show mixed and short-term effects on crack use/HIV risk outcomes. Material (e.g., safer crack use kit distribution) interventions also document modest efficacy in risk reduction; empirical assessments of environmental (e.g., drug consumption facilities) for crack smokers are not available. Diverse psycho-social treatment (including contingency management) interventions for crack abuse/dependence show some positive but also limited/short-term efficacy, yet likely constitute best currently available treatment options. Ancillary treatments show little effects but are understudied. Despite ample studies, pharmaco-therapeutic/immunotherapy treatment agents have not produced convincing evidence; select agents may hold potential combined with personalized approaches and/or psycho-social strategies. No comprehensively effective 'gold-standard' prevention/treatment interventions for crack abuse exist; concerted research towards improved interventions is urgently needed.

Alcohol and drug use disorders among homeless veterans: prevalence and association with supported housing outcomes

This study examines the prevalence of alcohol and drug disorders among homeless veterans entering the Housing and Urban Development-Veterans Affairs Supported Housing (HUD-VASH) program and its association with both housing and clinical outcomes. A total of 29,143 homeless veterans were categorized as either having: no substance use disorder, only an alcohol use disorder, only a drug use disorder, or both alcohol and drug use disorders. Veterans were compared on housing and clinical status prior to admission to HUD-VASH and a smaller sample of 14,086 HUD-VASH clients were compared on their outcomes 6 months after program entry. Prior to HUD-VASH, 60% of program entrants had a substance use disorder and 54% of those with a substance use disorder had both alcohol and drug use disorders. Homeless veterans with both alcohol and drug use disorders had more extensive homeless histories than others, and those with any substance use disorder stayed more nights in transitional housing or residential treatment in the previous month. After six months in HUD-VASH, clients with substance use disorders continued to report more problems with substance use, even after adjusting for baseline differences, but there were no differences in housing outcomes. These findings suggest that despite strong associations between substance use disorders and homelessness, the HUD-VASH program is able to successfully house homeless veterans with substance use disorders although additional services may be needed to address their substance abuse after they become housed.

Supportive housing: an evidence-based intervention for reducing relapse among low income adults in addiction recovery

Within the ranks of the homeless are individuals coping with substance addiction and/or chronic physical or mental disability. Their special needs often pose significant barriers to successfully re-integrate into society. For these individuals, simply securing a roof overhead may not be an adequate solution. Supportive housing combines housing with access to on-site social services to assist persons coping with disabling physical and behavioral health conditions. This study examined whether an association could be found between length of residency in supportive housing and subjective well-being. For the purposes of this study, subjective well-being was measured by length of sobriety, self-efficacy, and employment.

Effects of therapeutic goal management (TGM) on treatment attendance and drug abstinence among men with co-occurring substance use and axis I mental disorders who are homeless: results of the Birmingham EARTH program

Purpose

This study describes the implementation and impact of Therapeutic Goal Management (TGM) in a Substance Abuse and Mental Health Services Administration (SAMHSA)-sponsored demonstration project entitled Enhanced Addiction Recovery through Housing (EARTH).

Participants

The sample included 28 male participants followed at six months who completed some treatment. Forty-three percent were Caucasian, and 57% were African American. The average age of participants was 42 years.

Design

The relationships between TGM goal achievement, treatment attendance, and drug abstinence outcomes were studied among EARTH program participants who were homeless and met criteria for co-occurring substance use and severe DSM-IV Axis I mental disorders.

Results

The results revealed an overall drug abstinence rate of 72.4% over six months and significant positive relationships between TGM goal achievement and drug abstinence (r = 0.693) and TGM goal achievement and treatment attendance (r = 0.843).

Conclusions

This research demonstrated the relationship and potential positive impact of systematically setting, monitoring, and reinforcing personalized goals in multiple life areas on drug abstinence and treatment attendance outcomes among persons who are homeless with co-occurring substance use and other Axis I disorders in a integrated community service delivery program.

Efficacy of ecologically-based treatment with substance-abusing homeless mothers: substance use and housing outcomes

This randomized pilot study tested the efficacy of an integrative treatment targeting homeless substance abusing mothers with young children in their care. Sixty mothers with 2-6 year old children were recruited from a local family shelter. The mothers were randomly assigned to Ecologically-Based Treatment (n=30) or treatment as usual (n=30). The intervention group received 3 months of rental and utility assistance up to $600 per month, case management services, and substance abuse counseling (referred to as supportive services). The treatment as usual group received housing and services through the family shelter and community housing programs. All participants completed follow-up assessments at 3, 6, and 9 months post-baseline. Mothers receiving Ecologically-Based Treatment showed a quicker decline in alcohol frequency and a quicker increase in housing stability. Furthermore, with supportive services, two-thirds of women were successful in maintaining their apartments 6 months after rental assistance ended.

Impact of a housing first program on health utilization outcomes among chronically homeless persons

The authors examined the impact of a Housing First program on the use of specific health services, detoxification services, and criminal activity of long-term homeless individuals. The study sample consisted of eligible members of the inception cohort (18 enrollees) in the Single Adults Residential Assistance program (SARA) in Minneapolis, Minnesota. Analyses examined participant housing stability after enrollment in SARA and compared the use of a county medical center, detoxification programs, and criminal activity in the 2 years before and after enrollment in SARA. Only 1 of the 18 enrollees studied experienced homelessness during the 2-year follow-up after enrollment in SARA. There was a significant reduction in the amount of criminal activity in the 2-year period after SARA enrollment. The direction of association observed for other service uses remained consistent with expectations in existing literature, but were not statistically significant. Supportive housing for chronically homeless individuals may be successful at decreasing homelessness among this fragile population and may help reduce criminal activity.