What treatment and services are effective for people who are homeless and use drugs? A systematic 'review of reviews'

Excess mortality among people in homelessness with substance use disorders: a Swedish cohort study

BACKGROUND

People in homelessness have an increased risk of substance use disorders (SUDs) and poor health outcomes. This cohort study aimed to investigate the association between homelessness and mortality in people with SUDs, adjusting for age, sex, narcotic use, intravenous drug use and inpatient care for SUDs.

METHODS

Data from the Swedish National Addiction Care Quality Register in the Stockholm region were used to analyse mortality risk in people with SUDs (n=8397), including 637 in homelessness, 1135 in precarious housing and 6625 in stable housing, at baseline. HRs and CIs were calculated using Cox regression.

RESULTS

Mortality was increased for people in homelessness (HR 2.30; 95% CI 1.70 to 3.12) and precarious housing (HR 1.23; 95% CI 0.86 to 1.75) compared with those in stable housing. The association between homelessness and mortality decreased (HR 1.27; 95% CI 0.91 to 1.78) after adjusting for narcotic use (HR 1.28; 95% CI 1.00 to 1.63), intravenous drug use (HR 1.98; 95% CI 1.52 to 2.58) and inpatient care for SUDs (HR 1.96; 95% CI 1.57 to 2.45). Standardised mortality ratios (SMRs) showed that mortality among people in homelessness with SUDs was 13.6 times higher than the general population (SMR=13.6; 95% CI 10.2 to 17.9), and 3.7 times higher in people in stable housing with SUDs (SMR=3.7; 95% CI 3.2 to 4.1).

CONCLUSION

Homelessness increased mortality, but the risk decreased after adjusting for narcotic use, intravenous drug use and inpatient care for SUDs. Interventions are needed to reduce excess mortality among people in homelessness with SUDs.

Perspectives of people experiencing homelessness with recent non-fatal street drug overdose on the Pharmacist and Homeless Outreach Engagement and Non-medical Independent prescribing Rx (PHOENIx) intervention

INTRODUCTION

In Scotland, a third of all deaths of people experiencing homelessness (PExH) are street-drug-related, and less than half of their multiple physical- and mental health conditions are treated. New, holistic interventions are required to address these health inequalities. PHOENIx (Pharmacist Homeless Outreach Engagement and Non-medical Independent prescribing Rx) is delivered on outreach by National Health Service (NHS) pharmacist independent prescribers in partnership with third sector homelessness charity workers. We describe participant's perspectives of PHOENIx.

METHODS

This study aims to understand experiences of the PHOENIx intervention by participants recruited into the active arm of a pilot randomised controlled trial (RCT). Semi-structured in-person interviews explored participants' evaluation of the intervention. In this study, the four components (coherence, cognitive participation, collective action, reflexive monitoring) of the Normalisation Process Theory (NPT) framework underpinned data collection and analyses.

RESULTS

We identified four themes that were interpreted within the NPT framework that describe participant evaluation of the PHOENIx intervention: differentiating the intervention from usual care (coherence), embedding connection and consistency in practice (cognitive participation), implementation of practical and emotional operational work (collective action), and lack of power and a commitment to long-term support (reflexive monitoring). Participants successfully engaged with the intervention. Facilitators for participant motivation included the relationship-based work created by the PHOENIx team. This included operational work to fulfil both the practical and emotional needs of participants. Barriers included concern regarding power imbalances within the sector, a lack of long-term support and the impact of the intervention concluding.

CONCLUSIONS

Findings identify and describe participants' evaluations of the PHOENIx intervention. NPT is a theoretical framework facilitating understanding of experiences, highlighting both facilitators and barriers to sustained engagement and investment. Our findings inform future developments regarding a subsequent definitive RCT of PHOENIx, despite challenges brought about by challenging micro and macro-economic and political landscapes.

Barriers to access to hepatitis C treatment with direct-acting antivirals in people who inject drugs in the community setting

Barriers to access to hepatitis C treatment with direct-acting antivirals in people who inject drugs in the community setting. Qualitative study with prison population. Hepatitis C (HCV) treatments with direct-acting antiviral therapy (DAA) are an easy and effective option among people who inject drugs (PWID). However, difficulties in accessing and monitoring treatment in community services and dropouts on release from prison are detected among PWID. For this reason, the aim of the study is to know the access barriers in the diagnosis and treatment of HCV in community health services. An exploratory qualitative study was carried out through semi-structured interviews with 33 PWID recruited in a pre-trial detention prison in Barcelona. The information obtained was analysed using grounded theory. Among PWID sub-population entering prison, personal barriers are related to intense drug use, lack of interest and ignorance of HCV infection and treatment, as well as being in a situation of social exclusion. In relation to health providers, they reported receiving little information, the existence of language barriers in migrants, not receiving screening and treatment proposals, and having poor interactions with some professionals. Systemic barriers were expressed related to the health system circuit being complicated, perceiving little comprehensive care and lack of community support. It is recommended to intensify prevention and treatment campaigns, promoting drug substitution programmes than current ones, improve health education, make the diagnosis and treatment process more flexible, and promote social policies and holistic care for greater coverage of the needs of PWID.

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.

Developing a Theoretically Informed Implementation Model for Telemedicine-Delivered Medication for Opioid Use Disorder: Qualitative Study With Key Informants

BACKGROUND

Telemedicine-delivered medication for opioid use disorder (TMOUD) has become more prevalent during the COVID-19 pandemic, particularly in North America. This is considered a positive development as TMOUD has the potential to increase access to evidence-based treatment for a population heavily affected by the opioid crisis and consequent rising mortality and morbidity rates in relation to opioid use disorder. Despite the increase in the use of TMOUD, there are no established service- and process-focused models to guide the implementation of this intervention.

OBJECTIVE

This study aims to develop a process- and service-focused implementation model in collaboration with key stakeholders and bring together peer-reviewed literature, practice-based knowledge, and expert opinions.

METHODS

The simple rules for evidence translation in complex systems framework was applied to guide the development of a 6-step qualitative study. The steps were definition of the scope and objectives of the model, identification of evidence, stakeholder engagement, draft model development, key informant consultation, and final model specification.

RESULTS

The final specification for the TMOUD implementation model incorporated key strategic priorities, service delivery prerequisites, service design elements, stakeholder identification and engagement, key process domains, and iterative cycles of evaluation and improvement.

CONCLUSIONS

Through stakeholder engagement and key informant consultation, we produced a process- and service-focused TMOUD implementation model. The model is modifiable to different contexts and settings while also in keeping with the current evidence base and national and international standards of high-quality opioid use disorder care.

A qualitative exploration of older people's lived experiences of homelessness and memory problems - stakeholder perspectives

BACKGROUND

The numbers of older people experiencing both homelessness and memory problems are growing, yet their complex health, housing and care needs remain undelineated and unmet. There is a critical gap in understanding what can improve the care, support and experiences of this group. In this qualitative study we explore how stakeholders understand memory problems among older people in the context of homelessness and consider what they judge gets in the way of achieving positive outcomes.

METHOD

We conducted reflexive thematic analysis of qualitative interviews (n = 49) using a semi-structured topic guide, with 17 older people (aged ≥ 50 years) experiencing memory problems and homelessness, 15 hostel staff and managers, and 17 health, housing and social care practitioners. We recruited participants from six homelessness hostels, one specialist care home and National Health and Local Authority Services in England.

RESULTS

We identified four overarching themes. The population is not taken seriously; multiple causes are hard to disentangle; risk of exploitation and vulnerability; and (dis)connection and social isolation. The transience and lack of stability associated with homelessness intensified the disorienting nature of memory and cognitive impairment, and those providing direct and indirect support required flexibility and persistence, with staff moving beyond traditional roles to advocate, provide care and safeguard individuals. Memory problems were perceived by frontline staff and older people to be overlooked, misinterpreted, and misattributed as being caused by alcohol use, resulting in pervasive barriers to achieving positive and desired outcomes.

CONCLUSIONS

Efforts to meet the needs of older people living with memory problems and experiencing homelessness and future interventions must reflect the complexity of their lives, often in the context of long-term alcohol use and current service provision and we make suggestions as to what could be done to improve the situation.

Medication treatment for alcohol use disorder in special populations

BACKGROUND AND OBJECTIVES

Alcohol use disorder (AUD) is a significant public health concern, with underutilized effective treatments, particularly in special populations. This article summarizes the current evidence and guidelines for treating AUD in special populations.

METHODS

This article is a literature review that synthesizes the latest research on AUD treatment for special populations. We screened 242 articles and included 57 in our final review.

RESULTS

There are four food and Drug Administration-approved medications for AUD (MAUD): disulfiram, oral naltrexone, extended-release injectable naltrexone (XR-NTX), and acamprosate. Naltrexone and disulfiram have the potential to cause liver toxicity, and acamprosate should be avoided in patients with severe kidney disease. Psychosocial treatments should be considered first-line for pregnant and nursing patients. Naltrexone is contraindicated in patients on opioids, as it may precipitate acute withdrawal. For patients experiencing homelessness, nonabstinent treatment goals may be more practical, and XR-NTX should be considered to improve adherence. Limited evidence suggests medication can improve AUD treatment outcomes in adolescents and young adults. For patients with poor treatment response despite adequate medication adherence, switching to a different medication and augmentation with psychosocial treatments should be considered.

DISCUSSION AND CONCLUSIONS

Understanding the unique considerations for special populations with AUD is crucial, and addressing their special needs may improve their treatment outcomes.

SCIENTIFIC SIGNIFICANCE

Our study significantly contributes to the existing literature by summarizing crucial information for the treatment of AUD in special populations, highlighting distinct challenges, and emphasizing tailored approaches to improve overall health and well-being.

Civil commitment perspectives and experiences among friends and family of people who use illicit opioids in Massachusetts, USA

BACKGROUND

Civil commitment statutes allow qualified individuals to petition for court-mandated commitment for someone with a substance use disorder (SUD). Despite a lack of empirical evidence showing efficacy of involuntary commitment, these statutes are prevalent worldwide. We examined perspectives on civil commitment among family members and close friends of people who use illicit opioids in Massachusetts, U.S.A.

METHODS

Eligible individuals were Massachusetts residents, ≥18 years of age, did not use illicit opioids but had a close relationship with someone who did. We used a sequential mixed methods approach in which semi-structured interviews (N=22) were followed by a quantitative survey (N=260). Thematic analysis was used to analyze qualitative data and survey data were analyzed using descriptive statistics.

RESULTS

While some family members were influenced by SUD professionals to petition for civil commitment, influence from social networks based on personal experience was more common. Motivations for civil commitment included initiating recovery and believing that commitment would reduce overdose risk. Some reported that it afforded them respite from caring for, and worrying about, their loved one. A minority discussed increases in overdose risk following a period of forced abstinence. Participants expressed concerns about the variable quality of care during commitment, largely based on the use of corrections facilities for civil commitment in Massachusetts. A minority endorsed the use of these facilities for civil commitment.

CONCLUSIONS

Despite participants' uncertainty and the harms stemming from civil commitment, including increased risk of overdose after forced abstinence and the use of corrections facilities, family members resorted to this mechanism to reduce immediate overdose risk. Our findings indicate that peer support groups are an appropriate forum to disseminate information about evidenced-based treatment and that family members and others close to those with SUD often lack adequate support for, and respite from, the stress of caring for them.

Substance use and posttraumatic stress disorder: 12-month outcomes among adults experiencing chronic homelessness in Australia

INTRODUCTION

Substance use disorder and posttraumatic stress disorder (PTSD) are highly prevalent among individuals who experience homelessness. However, evaluations of interventions that combine housing and mental health services have reported inconsistent mental health and substance use outcomes when compared to usual services. We investigated 12-month change in substance use severity and PTSD symptom severity among adults experiencing chronic homelessness and tested whether observed differences were associated with housing, support from mental health services or the Journey to Social Inclusion (J2SI) program.

METHODS

A randomised controlled trial compared the J2SI program with standard service provision (N = 135). Secondary analyses compared those who obtained housing or received mental health services with those who did not. Primary outcomes were alcohol and illicit substance use severity (alcohol, smoking and substance involvement screening test) and PTSD symptom severity (six-item PTSD checklist).

RESULTS

There was significant improvement at 12 months in alcohol use severity, illicit substance use severity and PTSD symptoms in the overall sample. Having seen a mental health professional in the previous 12 months was associated with a significant reduction in alcohol and illicit substance use severity but was not associated with changes in PTSD symptom severity. Being housed at 12 months was associated with significantly higher alcohol use severity.

DISCUSSION AND CONCLUSIONS

Findings highlight the importance of access to mental health care for people with a history of chronic homelessness. Research is needed to develop and test therapeutic and housing approaches to reduce PTSD symptom severity among people with experience of homelessness.

Psychosocial Exoskeletons: Normal Development, Psychopathological and Sociopathological Phenomena, and Therapeutic Applications

In medical therapeutics, exoskeleton refers to external protections, supports, and appliances. By analogy, psychosocial exoskeletons can be envisioned as assistive psychological and social structures that brace and extend individuals' coping abilities. This article considers the utility of defining "psychosocial exoskeletons" as a framework to encompass psychological and social devices that enhance coping, and "therapeutic psychosocial exoskeletons" as devices assisting psychiatric treatment. Clinical observations were augmented via selective narrative review using PubMed and PsychInfo.A range of psychological and social devices were identified that constitute psychosocial exoskeletons. In extremes, psychosocial exoskeletons may prescribe comprehensive lifestyles including dress, rites, taboos, and acceptable relationships. These devices may enhance normal or psychopathological development.Therapeutic psychosocial exoskeletons consist of intentionally prescribed psychotherapeutic and sociotherapeutic interventions assembled to address patient-centered problems. Elements may include counseling and psychotherapies, peer-based recovery programs, institutional programs, and social interventions involving financial assistance, supported employment, pets, and other practical resources.

Hospital-based preventative interventions for people experiencing homelessness in high-income countries: A systematic review

BACKGROUND

People experiencing homelessness have significant unmet needs and high rates of unplanned care. We aimed to describe preventative interventions, defined in their broadest sense, for people experiencing homelessness in a hospital context. Secondary aims included mapping outcomes and assessing intervention effectiveness.

METHODS

We searched online databases (MEDLINE, Embase, PsycINFO, HMIC, CINAHL, Web of Science, Cochrane Library) from 1999-2019 and conducted backward and forward citation searches to 31 December 2020 (PROSPERO CRD42019154036). We included quantitative studies in emergency and inpatient settings measuring health or social outcomes for adults experiencing homelessness in high income countries. We assessed rigour using the "Quality Assessment Tool for Quantitative Studies" and summarised findings using descriptive quantitative methods, a binomial test, a Harvest Plot, and narrative synthesis. We used PRISMA and SWiM reporting guidelines.

FINDINGS

Twenty-eight studies identified eight intervention types: care coordination (n=18); advocacy, support, and outreach (n=13); social welfare assistance (n=13); discharge planning (n=12); homelessness identification (n=6); psychological therapy and treatment (n=6); infectious disease prevention (n=5); and screening, treatment, and referrals (n=5). The evidence strength was weak (n=16) to moderate (n=10), with two high quality randomised controlled trials. We identified six outcome categories with potential benefits observed for psychosocial outcomes, including housing (11/13 studies, 95%CI=54.6-98.1%, p=0.023), healthcare use (14/17, 56.6-96.2%, p=0.013), and healthcare costs (8/8, 63.1-100%, p=0.008). Benefits were less likely for health outcomes (4/5, 28.3-99.5%, p=0.375), integration with onward care (2/4, 6.8-93.2%, p=1.000), and feasibility/acceptability (5/6, 35.9-99.6%, p=0.219), but confidence intervals were very wide. We observed no harms. Most studies showing potential benefits were multi-component interventions.

INTERPRETATION

Hospital-based preventative interventions for people experiencing homelessness are potentially beneficial, but more rigorous research is needed. In the context of high needs and extreme inequities, policymakers and healthcare providers may consider implementing multi-component preventative interventions.

FUNDING

SL is supported by an NIHR Clinical Doctoral Research Fellowship (ICA-CDRF-2016-02-042). JD is supported by an NIHR School of Public Health Research Pre-doctoral Fellowship (NU-004252). RWA is supported by a Wellcome Clinical Research Career Development Fellowship (206602).

Trends and distinct profiles of persons who inject drugs in the United States, 2015-2019

Drug injection represents a major health problem in the US, with severe health consequences including the transmission of blood-borne infections. An examination of the most recent trends in drug injection is warranted by the fast-evolving drug epidemic and recent policy changes such as the federal funding ban on needle exchange programs. This research examines current drug injection trends, patterns, and socioeconomic and behavioral profiles of people who inject drugs (PWID). Data were derived from the 2002 to 2019 National Survey on Drug Use and Health (NSDUH). After examining the annual prevalence of drug injection since 2002, a latent class analysis was conducted to identify drug injection and other substance misuse patterns among PWID using the latest (2015-2019) NSDUH datasets. Associations between class membership and behavioral health comorbidities and treatment receipt were also assessed. The drug injection prevalence among US adults aged 18-64 increased from 0.21% in 2002/2004 to 0.36% in 2017/2019. Three distinctive groups were identified: the heroin injection group (45.2%), the methamphetamine injection group (28.0%), and the multi-drug injection group (26.8%). The methamphetamine injection group reported greater risks of experiencing serious psychological distress, suicidality, and limited substance use treatment. Special attention is needed for those who primarily injected methamphetamine. Programs to promote harm reduction and increase access to addiction treatment need to be expanded in at-risk communities while accounting for their distinct socioeconomic and drug use/misuse profiles.

Assessing the feasibility, acceptability and accessibility of a peer-delivered intervention to reduce harm and improve the well-being of people who experience homelessness with problem substance use: the SHARPS study

BACKGROUND

For people experiencing homelessness and problem substance use, access to appropriate services can be challenging. There is evidence that the development of trusting relationships with non-judgemental staff can facilitate service engagement. Peer-delivered approaches show particular promise, but the evidence base is still developing.

METHODS

The study used mixed methods to assess the feasibility, acceptability and accessibility of a peer-delivered, relational intervention to reduce harms and improve health/well-being, quality of life and social functioning, for people experiencing homelessness and problem substance use. Four Peer Navigators were employed to support individuals (n = 68 total, intervention participants). They were based in outreach services and hostels in Scotland and England. Qualitative interviews were conducted with intervention participants, Peer Navigators and staff in services, and observations were conducted in all settings. Quantitative outcomes relating to participants' substance use, physical and mental health, and quality of the Peer Navigator relationship, were measured via a 'holistic health check' with six questionnaires completed at two time-points.

RESULTS

The intervention was found to be acceptable to, and feasible and accessible for, participants, Peer Navigators, and service staff. Participants reported improvements to service engagement, and feeling more equipped to access services independently. The lived experience of the Peer Navigators was highlighted as particularly helpful, enabling trusting, authentic, and meaningful relationships to be developed. Some challenges were experienced in relation to the 'fit' of the intervention within some settings. Among participants there were reductions in drug use and risky injecting practices. There were increases in the number of participants receiving opioid substitution therapy. Overall, the intervention was positively received, with collective recognition that the intervention was unique and highly valuable. While most of the measures chosen for the holistic health check were found to be suitable for this population, they should be streamlined to avoid duplication and participant burden.

CONCLUSIONS

The study established that a peer-delivered, relational harm reduction intervention is acceptable to, and feasible and accessible for, people experiencing homelessness and problem substance use. While the study was not outcomes-focused, participants did experience a range of positive outcomes. A full randomised controlled trial is now required to assess intervention effectiveness.

TRIAL REGISTRATION

Study registered with ISRCTN: 15900054.