Housing status and accidental substance-related acute toxicity deaths in Canada, 2016-2017. / Recherche quantitative originale Statut résidentiel et décès accidentels attribuables à une intoxication aiguë liée à une substance au Canada, 2016-2017.

INTRODUCTION: There is a complex relationship between housing status and substance use, where substance use reduces housing opportunities and being unhoused increases reasons to use substances, and the associated risks and stigma. METHODS: In this descriptive analysis of people without housing who died of accidental substance-related acute toxicity in Canada, we used death investigation data from a national chart review study of substance-related acute toxicity deaths in 2016 and 2017 to compare sociodemographic factors, health histories, circumstances of death and substances contributing to death of people who were unhoused and people not identified as unhoused, using Pearson chi-square test. The demographic distribution of people who died of acute toxicity was compared with the 2016 Nationally Coordinated Point-In-Time Count of Homelessness in Canadian Communities and the 2016 Census. RESULTS: People without housing were substantially overrepresented among those who died of acute toxicity in 2016 and 2017 (8.9% versus <1% of the overall population). The acute toxicity event leading to death of people without housing occurred more often in an outdoor setting (24%); an opioid and/or stimulant was identified as contributing to their death more frequently (68%-82%; both contributed in 59% of their deaths); and they were more frequently discharged from an institution in the month before their death (7%). CONCLUSION: We identified several potential opportunities to reduce acute toxicity deaths among people who are unhoused, including during contacts with health care and other institutions, through harm reduction supports for opioid and stimulant use, and by creating safer environments for people without housing.

Why some homeless individuals are unsheltered: A narrative review of self-reported reasons.

The rising rate of unsheltered homelessness is a troubling and important public health issue. This narrative review sought to answer the question: What are the reasons that homeless individuals report for being unsheltered? To identify studies, systematic search methods were applied to PubMed, Google Scholar, and PsycINFO databases using the following eligibility criteria: English-written, peer-reviewed studies published from 2000 to 2023 that reported qualitative or quantitative data related to reasons why homeless individuals in a Western country were unsheltered. After duplicates were removed, 14,690 studies were screened and filtered to 10 final studies that fit all eligibility criteria and were included in the review. Eight of the 10 studies reported qualitative data from interviews and focus groups; the two quantitative studies reported data from interviewer-administered surveys. Across studies, eight thematic categories were identified as barriers to staying in shelters or other sheltered locations: lack of safety, triggers for substance use, strict shelter rules, triggers for substance use, perceived inadequate care, unsanitary conditions, required treatment to participate in housing program, no pet or family accommodations, and lack of accessibility for individuals with disabilities. Together, these findings indicate the delicate balance needed in homeless shelters to have both an inclusive/permissive and structured/safe environment for homeless individuals. Attention to the design and operation of homeless shelters, as well as staff training and accommodation for clients with special needs may improve some of these issues.

Disproportionate Increases in Numbers and Rates of Homelessness Among Women in the United States, 2018-2022.

OBJECTIVES: Information about homelessness among women is conflicting. We examined changes in the number and rate of various types of homelessness among females in multiple population groups from 2018 through 2022. METHODS: We used 5 years of population data (2018-2022) from the US Department of Housing and Urban Development (HUD) and the US Department of Veterans Affairs (VA). We performed descriptive analyses to examine changes in rates of homelessness over time and differences in rates of homelessness between general and veteran populations. RESULTS: From 2018 through 2022, there were major increases in rates of unsheltered homelessness among females (25.1%) and males (17.3%) in the general population, which outpaced increases in general population birth rates. Although the percentage change in the proportion of females among all people experiencing unsheltered homelessness grew by 4.0%, the proportion of females among all veterans experiencing unsheltered homelessness grew by 26.3%. CONCLUSIONS: These findings highlight the growing problem of unsheltered homelessness in the general population. Prevention efforts should be focused particularly on the female, especially veteran female, population.

Predicting hotspots of unsheltered homelessness using geospatial administrative data and volunteered geographic information.

Unsheltered homelessness is an increasingly prevalent phenomenon in major cities that is associated with adverse health and mortality outcomes. This creates a need for spatial estimates of population denominators for resource allocation and epidemiological studies. Gaps in the timeliness, coverage, and spatial specificity of official Point-in-Time Counts of unsheltered homelessness suggest a role for geospatial data from alternative sources to provide interim, neighborhood-level estimates of counts and trends. We use citizen-generated data from homeless-related 311 requests, provider-based administrative data from homeless street outreach cases, and expert reports of unsheltered count to predict count and emerging hotspots of unsheltered homelessness in census tracts across the City of Los Angeles for 2019 and 2020. Our study shows that alternative data sources can contribute timely insights into the state of unsheltered homelessness throughout the year and inform the delivery of interventions to this vulnerable population.

"Death Is a Possibility for Those without Shelter": A Thematic Analysis of News Coverage on Homelessness and the 2021 Heat Dome in Canada.

Among the most vulnerable to the health-harming effects of heat are people experiencing homelessness. However, during the 2021 Heat Dome, the deadliest extreme heat event (EHE) recorded in Canada to date, people experiencing homelessness represented the smallest proportion of decedents (n = 3, 0.5%)-despite the impacted region (British Columbia) having some of the highest rates of homelessness in the country. Thus, we sought to explore the 2021 Heat Dome as a media-based case study to identify potential actions or targeted strategies that were initiated by community support agencies, individuals and groups, and communicated in the news during this EHE that may have aided in the protection of this group or helped minimize the mortality impacts. Using media articles collated for a more extensive investigation into the effects of the 2021 Heat Dome (n = 2909), we identified a subset which included content on people experiencing homelessness in Canada (n = 274, 9%). These articles were thematically analysed using NVivo. Three main themes were identified: (i) public warnings issued during the 2021 Heat Dome directly addressed people experiencing homelessness, (ii) community support services explicitly targeting this population were activated during the heat event, and (iii) challenges and barriers faced by people experiencing homelessness during extreme heat were communicated. These findings suggest that mass-media messaging and dedicated on-the-ground initiatives led by various organizations explicitly initiated to support individuals experiencing homelessness during the 2021 Heat Dome may have assisted in limiting the harmful impacts of the heat on this community.

Injury Pattern Analysis to Optimize Burn Injury Prevention in the Unhoused Community.

Unhoused patients are an overrepresented group in burn injury, and are a uniquely vulnerable population. Current research focuses on the consequences of homelessness on burn outcomes, with little known about the specific circumstances and behaviors leading to burn injury that may represent specific targets for injury prevention efforts. The burn registry at an urban regional burn center was queried for burn admissions in unhoused adults from 2019 to 2022. Registry data pulled included demographics, urine toxicology, mechanism of injury, and injury subjective history. Subjective injury history was reviewed to determine more specific injury circumstances and activities during which accidental burns occurred. Demographic and mechanistic trends in burn admissions were explored via descriptive statistics. Among 254 admissions for burns from the unhoused community, 58.1% of patients were positive for stimulants on admission. Among accidental injuries (69.7%), common circumstances included preparing food or beverages, cooking or using methamphetamine, smoking cannabis or tobacco, bonfires, and candles. A specific common circumstance was lighting a cigarette while handling accelerants (6.7%). Interventions for stimulant abuse, as well as outreach efforts to educate unhoused patients about situational awareness, safe handling of accelerants, safe smoking practices, and safe cooking practices, may be effective tools in reducing burn admissions in this vulnerable population.

Growing Concern About Unsheltered Homelessness Among Veterans: Clinical Characteristics and Engagement in Health Care Services.

OBJECTIVES: Veteran homelessness has declined in the past decade, but the proportion of unsheltered homeless veterans has increased. We identified characteristics of unsheltered homelessness in a large contemporary veteran cohort and examined outpatient and inpatient encounters before and after intake to US Department of Veterans Affairs (VA) homeless programs. METHODS: National data from the Homeless Operations Management Evaluation System (HOMES) database and the Corporate Data Warehouse were analyzed on 191 204 veterans experiencing housing instability from January 2018 through December 2021. We used hierarchical multivariate logistic regressions to model associations between sheltered status and veteran correlates. Repeated-measures analysis of variance assessed changes in care utilization after intake in homeless programs. RESULTS: Age <50 years (odds ratio [OR] = 1.3; 95% CI, 1.2-1.4), Hispanic ethnicity (OR = 1.2; 95% CI, 1.1-1.3), some college education (OR = 1.1; 95% CI, 1.0-1.1), and a bachelor's degree (OR = 1.2; 95% CI, 1.1-1.2) were associated with veteran unsheltered homelessness. Unsheltered veterans were more likely to have a VA service-connected disability (OR = 1.4; 95% CI, 1.4-1.5), military sexual trauma (OR = 1.1; 95% CI, 1.0-1.1), and/or combat exposure (OR = 1.1; 95% CI, 1.0-1.1). Unsheltered and sheltered homeless veterans had an increase in outpatient encounters and a decrease in inpatient care after intake to the VA homeless program. CONCLUSIONS: Contemporary unsheltered homeless veterans are younger and Hispanic with some college education. Innovative public health approaches that better engage and reduce barriers to entry need to be tested for a diverse unsheltered homeless population.

Addressing Mental Health Disability in Unsheltered Homelessness: Outpatient Conservatorship in Los Angeles.

OBJECTIVE: The authors sought to describe a pilot program for gravely disabled individuals experiencing unsheltered homelessness in Los Angeles County that illustrates a promising public health framework to address mental health-related disability in homeless populations. METHODS: Homeless outreach teams implementing the outpatient conservatorship (OPC) pilot program adopted a population health approach, multisystem care coordination, and prioritization of the least restrictive environments. The program allowed initiation of a Lanterman-Petris-Short (LPS) conservatorship outside of a hospital, with the goal of serving highly vulnerable individuals in the least restrictive settings. Between August 2020 and July 2021, the OPC pilot program served 43 clients, corresponding to 2% of those served by the outreach teams during that period. Using observational program evaluation data, the authors examined the impact of the program on this sample of participants. RESULTS: At 12 months, 81% of OPC clients were no longer experiencing unsheltered homelessness; 65% accessed an LPS conservatorship. Although most OPC clients utilized a psychiatric hospital, 54% left locked settings earlier than would have been possible without the program. One-third of clients referred for LPS conservatorship used unlocked licensed residential facilities in the first year. Negative events, such as remaining in unsheltered homelessness, were more common among clients not referred for LPS conservatorship. CONCLUSIONS: Timely receipt of street-based services and coordination of care before, during, and after referral for LPS conservatorship reduced use of restrictive settings. The OPC program's components constitute a promising triadic framework for addressing mental health disability among unsheltered individuals that warrants further investigation.

Behavioral Health Care Delivery Through Street Medicine Programs in California.

Mental health and substance use disorders are prevalent among people experiencing homelessness. Street Medicine can reach unhoused people who face barriers to accessing healthcare in more traditional medical settings including shelter-based clinics. However, there is little guidance on best practices for mental health and substance use treatment through Street Medicine. The aim of the study was to describe behavioral health care through Street Medicine by analyzing data from the California Street Medicine Landscape survey and follow-up qualitative interviews. Most street medicine programs utilize non-psychiatrists to diagnose and treat mental health and substance use disorders, though the capacity to provide the level of care needed varies. There is a lack of street-based psychiatric clinicians and programs have difficulty making referrals to mental health and addiction services. This report shows that Street Medicine could serve as a strategy to expand access to behavioral health care for the unhoused.

Sheltered from the heat? How tents and shade covers may unintentionally increase air temperature exposures to unsheltered communities.

Objective: Heat vulnerability and homelessness are central public health concerns in cities globally, and public health implementation should address these two challenges in tandem to minimize preventable heat-related morbidity and mortality. Populations facing unsheltered homelessness use tents (or similar shelters) with shading features to minimize sun and heat exposure. This study evaluates the efficacy of different tent cover (shading) materials and how they moderate the in-tent air temperature (Tair) exposures of tent users during extreme summer conditions. Study design: Within-tent Tair monitoring using Kestrel Drop devices occurred across three full typical summer days in Phoenix, Arizona in July 2022. Methods: In-tent Tair were statistically compared between six small side-by-side identical tents with different cover materials (control (no cover), mylar, white bedsheet, tarp, sunbrella fabric, aluminum foil), as well as with ambient Tair. Results: Using any tent resulted in higher daytime in-tent Tair than ambient Tair. Further, compared to a control tent, the Tair within tents shaded with sunbrella, tarp, and white bedsheet had significantly higher Tair at all times (2.36 °C, 2.46 °C, and 1.11 °C higher Tair, respectively), controlling for Tair and day/night. Conclusion: Adding cover materials over tents may increase heat risk to an already vulnerable population at certain times of the day. Higher in-tent Tair is attributable to the reduced ability for heat and vapor to escape, largely due to reduced ventilation (mixing). Local authorities and welfare associations should reconsider using unventilated tents for shading and promote more widespread, ventilated tents and shade to ensure that prevention efforts do not further marginalize the most vulnerable. Future work should incorporate more comprehensive measurements of solar radiation to quantify overall heat stress for exposure reduction techniques.

Nutritional needs, resources, and barriers among unhoused adults cared for by a street medicine organization in Chicago, Illinois: a cross-sectional study.

BACKGROUND: Those experiencing houselessness rely on obtaining food from community organizers and donations. Simultaneously, the houseless face disproportionally high rates of medical conditions that may be affected by diet including diabetes, hypertension, and hyperlipidemia. There is limited literature on the resources and barriers of the houseless community regarding optimal nutrition from an actionable perspective. Further, less data is available on how street medicine organizations may best impact the nutrition of the unhoused they serve. Elucidating this information will inform how organizational efforts may best support the nutrition of the houseless community. METHODS: In partnership with the medical student-run organization, Chicago Street Medicine, at Northwestern University Feinberg School of Medicine, twenty adults experiencing houselessness in Chicago, Illinois participated in the cross-sectional study. A 10-item survey was verbally administered to characterize the participants' daily food intake, food sources, barriers, resources, and nutritional preferences and needs. All data was directly transcribed into REDCap. Descriptive statistics were generated. RESULTS: Individuals consumed a median of 2 snacks and meals per day (IQR: 1-3). No participant consumed adequate servings of every food group, with only one participant meeting the dietary intake requirements for one food group. Participants most often received their food from donations (n = 15), purchasing themselves (n = 11), food pantries (n = 4), and shelters (n = 3). Eleven of nineteen participants endorsed dental concerns as a major barrier to consuming certain foods. Twelve participants had access to a can opener and twelve could heat their meals on a stove or microwave. Seven had access to kitchen facilities where they may prepare a meal. Approximately half of participants had been counseled by a physician to maintain a particular diet, with most related to reducing sugar intake. CONCLUSION: Most houseless participants were unable to acquire a balanced diet and often relied on organizational efforts to eat. Organizations should consider the chronic health conditions, dentition needs, and physical resources and barriers to optimal nutrition when obtaining food to distribute to the unhoused.

Unsheltered Homelessness and Health: A Literature Review.

Context: In recent years, cities across the world have seen widespread growth in unsheltered homelessness, in which a person sleeps in a place not meant for human habitation such as cars, parks, sidewalks, and abandoned buildings. It is widely understood that people experiencing homelessness have poorer health outcomes than the general population. Less is known about the health of people who are unsheltered, yet they may be exposed to greater health risks than their sheltered counterparts. The purpose of this literature review is to evaluate and summarize the evidence on unsheltered homelessness and health. Evidence Acquisition: A literature search was conducted using PubMed to identify publications on unsheltered homelessness and health. A total of 42 studies were included for review. Evidence Synthesis: Unsheltered populations experience higher rates of chronic disease, serious mental illness, and substance abuse than sheltered populations. Unsheltered homelessness is strongly associated with chronic homelessness that exacerbates serious mental illness and substance use, which is often co-occurring. Despite having large unmet health needs, unsheltered populations have lower healthcare utilization and often lack health insurance. Conclusions: Evaluating the impact of shelter status on health outcomes has important implications for the allocation of housing and health services. Longitudinal studies are needed to examine the relationship between the duration of sheltered and unsheltered homelessness and health outcomes and explore the mediating mechanisms that lead to poor health among unsheltered populations. Despite these limitations, our results also suggest an urgent need to address the unique and severe challenges facing unsheltered populations and the need for intervention approaches that are sensitive to these unique disease burdens.

Non-fatal stimulant overdose among homeless and unstably housed women in San Francisco, California.

BACKGROUND: US rates of overdose deaths involving stimulants (e.g., cocaine or methamphetamine) have increased, but little is known about non-fatal stimulant overdoses, particularly among vulnerable populations. We characterized rates of non-fatal stimulant overdose identified outside of health care settings among women at high risk. METHODS: Homeless and unstably housed women in San Francisco, California using stimulants were administered questionnaires on drug use and outcomes (stimulant overdose, health care utilization) monthly for six months. Based on pilot interviews, stimulant overdose during follow-up was defined as acute toxicity from stimulant use ("over-amping") resulting in "feeling sick, really scared, or like one's life may be in danger". Poisson regression estimated unadjusted incidence rate ratio (IRR) comparing participant characteristics. RESULTS: We included 160 women (41% Black, 26% White, 15% Latina, median age 54 years) using crack cocaine (81%), methamphetamine (48%), and powdered cocaine (36%). Participants reported 67 non-fatal stimulant overdoses over 685 person-months of observation, a rate of 117.4 per 100 person-years (95% CI 85.8-160.5). Rates were higher among participants who were Latina vs. White (IRR 4.18 [1.60-10.94]), used methamphetamine (IRR 1.80 [0.96-3.38]), or used any stimulant daily/almost daily (IRR 2.63 [1.41-4.91]). Among women reporting stimulant overdose, 4% received emergency and 3% inpatient care for overdose of any drug. CONCLUSIONS: Women in this setting, particularly those who used stimulants frequently or used methamphetamine, experienced high non-fatal stimulant overdose and rarely received health care for these events. Efforts should be made to increase awareness and reduce harms of stimulant toxicity in vulnerable populations.

Using a "Big Events" framework to understand emergency department use among women experiencing homelessness or housing instability in San Francisco during the COVID-19 pandemic.

BACKGROUND: The COVID-19 pandemic created a major public health crisis that disrupted economic systems, social networks and individual behaviors, which led to changes in patterns of health care use. Factors associated with emergency department (ED) visits during the pandemic among especially high-risk individuals are unknown. We used a "Big Events" approach, which considers major disruptions that create social instability, to investigate ED use in people experiencing homelessness or housing instability, many of whom use drugs. METHODS: Between July and December 2020, we conducted a community-based San Francisco study to compare homeless and unstably housed (HUH) women who did and did not use an ED during the first 10 months of the pandemic. RESULTS: Among 128 study participants, 34% had ≥1 ED visit during the pandemic. In adjusted analysis, factors significantly associated with ED use included experiencing homelessness, cocaine use and increased difficulties receiving drug use treatment during the pandemic. CONCLUSION: These findings build on the "Big Events" approach to considering risk pathways among people who use drugs. They suggest the importance of ensuring access to housing and low-barrier non-COVID health services, including drug treatment, alongside crisis management activities, to reduce the health impacts of public health crises.

The Ecology of Unsheltered Homelessness: Environmental and Social-Network Predictors of Well-Being among an Unsheltered Homeless Population.

People experiencing homelessness (PEH) face extreme weather exposure and limited social support. However, few studies have empirically assessed biophysical and social drivers of health outcomes among unsheltered PEH. Social network, health, and outdoor exposure data were collected from a convenience sample of unsheltered PEH (n = 246) in Nashville, TN, from August 2018-June 2019. Using multivariate fixed-effects linear regression models, we examined associations between biophysical and social environments and self-reported general health and emotional well-being. We found that study participants reported the lowest general health scores during winter months-Nashville's coldest season. We also found a positive association between the number of nights participants spent indoors during the previous week and general health. Participants who spent even one night indoors during the past week had 1.8-point higher general health scores than participants who spent zero nights indoors (p < 0.01). Additionally, participants who experienced a conflict with a social contact in the past 30 days had lower emotional well-being scores than participants who experienced no conflict. Finally, women had worse general health and emotional well-being than men. Ecologically framed research about health and well-being among PEH is critically needed, especially as climate change threatens to increase the danger of many homeless environments.

Implementing the Street Psychiatry Model in New Haven, CT: Community-Based Care for People Experiencing Unsheltered Homelessness.

"Street psychiatry" is an innovative model that serves people experiencing unsheltered homelessness, a vulnerable population with increased rates of mental illness and substance use disorders. Through community-based delivery of mental health and addiction treatment, street psychiatry helps the street-dwelling population overcome barriers to accessing care through traditional routes. Throughout the United States, street psychiatry programs have arisen in multiple cities, often in partnership with street medicine programs. We discuss the philosophy of street psychiatry, document operational highlights involved in the development of a street psychiatry program in New Haven, CT, suggest key ingredients to implementing a street psychiatry program, and explore challenges and future frontiers. Street psychiatry is an effective person-centered model of service delivery with the potential to be applied in a variety of urban settings to serve people experiencing street homelessness.

Air Pollution-Related Health Impacts on Individuals Experiencing Homelessness: Environmental Justice and Health Vulnerability in Salt Lake County, Utah.

Experiences of homelessness, although widely varied, are characterized by extensive time in public spaces, often outdoors. However, there has been little empirical research about the ways in which environmental factors affect individuals experiencing homelessness (IEHs). Therefore, the purpose of this study was to use an environmental justice approach to understand how cardiopulmonary health of IEHs is affected by episodic poor air quality in Salt Lake County. It was hypothesized that people who had experienced unsheltered homelessness and those who had been experiencing homelessness for longer periods of time would report greater health difficulties from poor air quality exposure. Through a combination of in-person semistructured interviews with IEHs (n = 138) and access to corresponding state-based service provider databases, researchers examined both overall descriptives of and relationships between types (sheltered and unsheltered) and duration (chronic and nonchronic) of homelessness. More than 61% of IEHs reported physical reactions to air pollution, 37% reported air pollution-related emotional stress, and more than 89% had sought medical attention for a condition related to air pollution. Findings indicate that while IEHs report a number of health effects related to poor air quality, there were no significant differences between individuals based on either sheltered status or duration of their experiences of homelessness. This study provides an initial empirical inquiry to understand how environmental disamenities negatively influence IEHs, as well as noting that sheltered status and duration of homelessness are less impactful than originally hypothesized.

Comparing Unsheltered and Sheltered Homeless: Demographics, Health Services Use and Predictors of Health Services Use.

Secondary data obtained through the 2015 point-in-time homelessness count and an administrative health care utilization database was used to identify differences in demographic characteristics, health service use, and predictors of health service use among people experiencing unsheltered and sheltered homelessness. Compared to sheltered participants, unsheltered participants had higher proportions of males and Caucasians, were younger, were more likely to use any type of health service and ED services, and used significantly more of any health service and ED and outpatient services. Results also confirm that health services utilization is a complex phenomenon predicted by a variety of predisposing, enabling, and need-related factors, including mental health problems. Together, these findings demonstrate important differences between people living unsheltered and those residing in shelters and they inform local health policy and program initiatives tailored towards these homeless populations.