Mortality by Age, Gender, and Race and Ethnicity in People Experiencing Homelessness in Boston, Massachusetts

Importance

People experiencing homelessness (PEH) face disproportionately high mortality rates compared with the general population, but few studies have examined mortality in this population by age, gender, and race and ethnicity.

Objective

To evaluate all-cause and cause-specific mortality in a large cohort of PEH by age, gender, and race and ethnicity.

Design, Setting, and Participants

An observational cohort study was conducted from January 1, 2003, to December 31, 2018. All analyses were performed between March 16, 2021, and May 12, 2022. A cohort of adults (age ≥18 years) seen at the Boston Health Care for the Homeless Program (BHCHP), a large federally funded Health Care for the Homeless organization in Boston, Massachusetts, from January 1, 2003, to December 31, 2017, was linked to Massachusetts death occurrence files spanning January 1, 2003, to December 31, 2018.

Main Outcomes and Measures

Age-, gender-, and race and ethnicity-stratified all-cause and cause-specific mortality rates were examined and compared with rates in the urban Northeast US population using mortality rate ratios (RRs).

Results

Among the 60 092 adults included in the cohort with a median follow-up of 8.6 (IQR, 5.1-12.5) years, 7130 deaths occurred. The mean (SD) age at death was 53.7 (13.1) years; 77.5% of decedents were men, 21.0% Black, 10.0% Hispanic/Latinx, and 61.5% White. The all-cause mortality rate was 1639.7 deaths per 100 000 person-years among men and 830 deaths per 100 000 person-years among women. The all-cause mortality rate was highest among White men aged 65 to 79 years (4245.4 deaths per 100 000 person-years). Drug overdose was a leading cause of death across age, gender, and race and ethnicity groups, while suicide uniquely affected young PEH and HIV infection and homicide uniquely affected Black and Hispanic/Latinx PEH.

Conclusions and Relevance

In this large cohort study of PEH, all-cause and cause-specific mortality varied by age, gender, and race and ethnicity. Tailored interventions focusing on those at elevated risk for certain causes of death are essential for reducing mortality disparities across homeless-experienced groups.

Developing a Women's Health track within addiction medicine fellowship: reflections and inspirations

BACKGROUND

Women who use drugs face sexism and intersectional stigma that influence their drug use experiences and treatment needs. There is a need to build the capacity of addiction medicine specialists who can deliver gender-responsive services and advance research and policy in women-focused addiction care. We describe the development of a Women's Health track within an addiction medicine fellowship program and reflect on successes, challenges, and future directions.

MAIN BODY

The Women's Health track was developed in collaboration between program leaders in Addiction Medicine and Obstetrics/Gynecology. Implementing the track led to the development of women-focused rotations and continuity clinics, as well as enrichment of women's health didactic education for all fellows. The fellowship track spurred interdepartmental mentorship and collaboration on research and advocacy projects.

CONCLUSION

Addiction medicine fellowships can replicate this curriculum model to advance women-focused education, research, and policy. Future curricula should focus on structural sexism in drug use and addiction treatment throughout a woman's life course.

Drug Overdose Mortality Among People Experiencing Homelessness, 2003 to 2018

Importance

Despite high rates of drug overdose death among people experiencing homelessness, patterns in drug overdose mortality, including the types of drugs implicated in overdose deaths, remain understudied in this population.

Objective

To describe the patterns in drug overdose mortality among a large cohort of people experiencing homelessness in Boston vs the general adult population of Massachusetts and to evaluate the types of drugs implicated in overdose deaths over a continuous 16-year period of observation.

Design, Setting, and Participants

This cohort study analyzed adults aged 18 years or older who received care at Boston Health Care for the Homeless Program (BHCHP) between January 1, 2003, and December 31, 2017. Individuals were followed up from the date of their initial BHCHP encounter during the study period until the date of death or December 31, 2018. Data were analyzed from December 1, 2020, to June 6, 2021.

Main Outcomes and Measures

Drug overdose deaths and the types of drugs involved in each overdose death were ascertained by linking the BHCHP cohort to the Massachusetts Department of Public Health death records.

Results

In this cohort of 60 092 adults experiencing homelessness (mean [SD] age at entry, 40.4 [13.1] years; 38 084 men [63.4%]), 7130 individuals died by the end of the study period. A total of 1727 individuals (24.2%) died of a drug overdose. Of the drug overdose decedents, 456 were female (26.4%), 194 were Black (11.2%), 202 were Latinx (11.7%), and 1185 were White (68.6%) individuals, and the mean (SD) age at death was 43.7 (10.8) years. The age- and sex-standardized drug overdose mortality rate in the BHCHP cohort was 278.9 (95% CI, 266.1-292.3) deaths per 100 000 person-years, which was 12 times higher than the Massachusetts adult population. Opioids were involved in 91.0% of all drug overdose deaths. Between 2013 and 2018, the synthetic opioid mortality rate increased from 21.6 to 327.0 deaths per 100 000 person-years. Between 2004 and 2018, the opioid-only overdose mortality rate decreased from 117.2 to 102.4 deaths per 100 000 person-years, whereas the opioid-involved polysubstance mortality rate increased from 44.0 to 237.8 deaths per 100 000 person-years. Among opioid-involved polysubstance overdose deaths, cocaine-plus-opioid was the most common substance combination implicated throughout the study period, with Black individuals having the highest proportion of cocaine-plus-opioid involvement in death (0.72 vs 0.62 in Latinx and 0.53 in White individuals; P < .001).

Conclusions and Relevance

In this cohort study of people experiencing homelessness, drug overdose accounted for 1 in 4 deaths, with synthetic opioid and polysubstance involvement becoming predominant contributors to mortality in recent years. These findings emphasize the importance of increasing access to evidence-based opioid overdose prevention strategies and opioid use disorder treatment among people experiencing homelessness, while highlighting the need to address both intentional and unintentional polysubstance use in this population.

Awareness, Utilization, and Preferences of Harm Reduction Interventions among Street-Involved Young Adults in Boston

OBJECTIVES

This study explores knowledge and utilization of, barriers to, and preferences for harm reduction services among street-involved young adults (YA) in Boston, Massachusetts.

METHODS

This cross-sectional survey of YA encountered between November and December 2019 by a longstanding outreach program for street-involved YA. We report descriptive statistics on participant-reported substance use, knowledge and utilization of harm reduction strategies, barriers to harm reduction services and treatment, and preferences for harm reduction service delivery.

RESULTS

The 52 YA surveyed were on average 21.4 years old; 63.5% were male, and 44.2% were Black. Participants reported high past-week marijuana (80.8%) and alcohol (51.9%) use, and 15.4% endorsed opioid use and using needles to inject drugs in the past six months. Fifteen (28.8%) YA had heard of "harm reduction", and 17.3% reported participating in harm reduction services. The most common barriers to substance use disorder treatment were waitlists and cost. Participants suggested that harm reduction programs offer peer support (59.6%) and provide a variety of services including pre-exposure prophylaxis (42.3%) and sexually transmitted infection testing (61.5%) at flexible times and in different languages, including Spanish (61.5%) and Portuguese (17.3%).

CONCLUSIONS

There is need for comprehensive, YA-oriented harm reduction outreach geared toward marginalized YA and developed with YA input to reduce barriers, address gaps in awareness and knowledge of harm reduction, and make programs more relevant and inviting to YA.

Experience with a Mobile Addiction Program among People Experiencing Homelessness

A mobile addiction-focused outreach program designed to improve access to care for people experiencing homelessness was implemented in response to the opioid overdose crisis. This innovative program was readily accepted among participants and can inform the development of similar programs delivering addiction-focused care to people experiencing homelessness elsewhere.

Estimating the Prevalence of Advanced Fibrosis in Homeless Adults with Hepatitis C in Boston

BACKGROUND AND AIMS

Hepatitis C virus (HCV) infection is highly prevalent among homeless individuals, but the scope of HCV-associated liver fibrosis in this population is poorly understood.

METHODS

Using the FIB-4 Index, we describe the prevalence and correlates of advanced fibrosis among a retrospective cohort of all homeless-experienced adults with HCV seen at Boston Health Care for the Homeless Program (BHCHP) over a one-year period.

RESULTS

Of 832 BHCHP patients with HCV, 15.8% had advanced fibrosis. In multivariable regression analysis, alcohol use disorder (adjusted odds ratio [aOR] 2.50, 95% confidence interval [CI] 1.65-3.81) and having unknown or poorly characterized housing circumstances (aOR 2.88, 95% CI 1.02-8.14, relative to housed patients) were independently associated with advanced fibrosis.

CONCLUSIONS

The prevalence of advanced fibrosis in this cohort of homeless adults with HCV appears similar to national estimates among housed individuals, but their psychosocial complexity is greater, especially among those who are older.

Health Care Spending And Use Among People Experiencing Unstable Housing In The Era Of Accountable Care Organizations

Provider organizations are increasingly held accountable for health care spending in vulnerable populations. Longitudinal data on health care spending and use among people experiencing episodes of homelessness could inform the design of alternative payment models. We used Medicaid claims data to analyze spending and use among 402 people who were continuously enrolled in the Boston Health Care for the Homeless Program (BHCHP) from 2013 through 2015, compared to spending and use among 18,638 people who were continuously enrolled in Massachusetts Medicaid with no evidence of experiencing homelessness. The BHCHP population averaged $18,764 per person per year in spending-2.5 times more than spending among the comparison Medicaid population ($7,561). In unadjusted analyses this difference was explained by greater spending in the BHCHP population on outpatient care, including emergency department care, as well as on inpatient care and prescription drugs. After adjustment for covariates and multiple hypothesis testing, the difference was largely driven by outpatient spending. Differences were sensitive to adjustments for risk score, which suggests that housing instability and health risk are meaningfully correlated. This longitudinal analysis improves understanding of health care use and resource needs among people who are homeless or have unstable housing, and it could inform the design of alternative payment models for vulnerable populations.

Harm Reduction for Adolescents and Young Adults During the COVID-19 Pandemic: A Case Study of Community Care in Reach

The coronavirus disease 2019 (COVID-19) pandemic has challenged the ability of harm reduction programs to provide vital services to adolescents, young adults, and people who use drugs, thereby increasing the risk of overdose, infection, withdrawal, and other complications of drug use. To evaluate the effect of the COVID-19 pandemic on harm reduction services for adolescents and young adults in Boston, we conducted a quantitative assessment of the Community Care in Reach (CCIR) youth pilot program to determine gaps in services created by its closure during the peak of the pandemic (March 19-June 21, 2020). We also conducted semistructured interviews with staff members at 6 harm reduction programs in Boston from April 27 through May 4, 2020, to identify gaps in harm reduction services, changes in substance use practices and patterns of engagement with people who use drugs, and how harm reduction programs adapted to pandemic conditions. During the pandemic, harm reduction programs struggled to maintain staffing, supplies, infection control measures, and regular connection with their participants. During the 3-month suspension of CCIR mobile van services, CCIR missed an estimated 363 contacts, 169 units of naloxone distributed, and 402 syringes distributed. Based on our findings, we propose the following recommendations for sustaining harm reduction services during times of crisis: pursuing high-level policy changes to eliminate political barriers to care and fund harm reduction efforts; enabling and empowering harm reduction programs to innovatively and safely distribute vital resources and build community during a crisis; and providing comprehensive support to people to minimize drug-related harms.

Office-Based Addiction Treatment Retention and Mortality Among People Experiencing Homelessness

Importance

People experiencing homelessness have been disproportionately affected by the opioid overdose crisis. To mitigate morbidity and mortality, several office-based addiction treatment (OBAT) programs designed for this population have been established across the US, but studies have not yet evaluated their outcomes.

Objective

To evaluate treatment retention and mortality in an OBAT program designed specifically for individuals experiencing homelessness with opioid use disorder (OUD).

Design, Setting, and Participants

A retrospective cohort study was conducted in the Boston Health Care for the Homeless Program (BHCHP). Participants included all adult patients (N = 1467) who had 1 or more OBAT program encounter at BHCHP from January 1 through December 31, 2018. Data analysis was conducted from January 13 to December 14, 2020.

Exposures

Sociodemographic, clinical, and addiction treatment-related characteristics were abstracted from the BHCHP electronic health record.

Main Outcomes and Measures

The primary outcome was all-cause mortality, identified by linkage to the Massachusetts Department of Public Health vital records. Multivariable Cox proportional hazards regression analyses were performed to evaluate baseline and time-varying variables associated with all-cause mortality. Secondary addiction treatment-related outcomes were abstracted from the electronic health record and included (1) BHCHP OBAT program retention, (2) buprenorphine continuation and adherence verified by toxicology testing, and (3) opioid abstinence verified by toxicology testing.

Results

Of 1467 patients in the cohort, 1046 were men (71.3%) and 731 (49.8%) were non-Hispanic White; mean (SD) age was 42.2 (10.6) years. Continuous retention in the OBAT program was 45.2% at 1 month, 21.7% at 6 months, and 11.3% at 12 months. Continuous buprenorphine adherence was 41.5% at 1 month, 17.6% at 6 months, and 10.2% at 12 months, and continuous opioid abstinence was 28.3% at 1 month, 6.1% at 6 months, and 2.9% at 12 months. The all-cause mortality rate was 29.0 deaths per 1000 person-years, with 51.8% dying from drug overdose. Past-month OBAT program attendance was associated with lower mortality risk (adjusted hazard ratio, 0.34; 95% CI, 0.21-0.55).

Conclusions and Relevance

Mortality rates were high in this cohort of addiction treatment-seeking homeless and unstably housed individuals with OUD. Although continuous OBAT program retention was low, past-month attendance in care was associated with reduced mortality risk. Future work should examine interventions to promote increased OBAT attendance to mitigate morbidity and mortality in this vulnerable population.

Substance consumption and intoxication patterns in a medically supervised overdose prevention program for people experiencing homelessness

Background: Opioid overdose is a leading cause of death among homeless individuals. Combining psychoactive substances with opioids increases overdose risk. This study aimed to describe intoxication patterns at a drop-in space offering medical monitoring and harm reduction services to individuals who arrive intoxicated and at risk of overdose. Methods: We examined data from visits to the Supportive Place for Observation and Treatment at Boston Health Care for the Homeless Program between January 1, 2017 and December 31, 2017. We used k-means cluster analysis to characterize intoxication patterns based on clinically assessed sedation levels and vital sign parameters. Multinomial logistic regression analysis assessed demographic and substance consumption predictors of cluster membership. Linear and logistic regression models examined associations between cluster membership and care outcomes. Results: Across 305 care episodes involving 156 unique patients, cluster analysis revealed 3 distinct intoxication patterns. Cluster A (26.6%) had mild sedation and normal vital signs. Cluster B (44.5%) featured greater sedation with bradycardia and/or hypotension. Cluster C (28.9%) was comparable to cluster B but with the addition of hypoxia. Self-reported consumption of non-opioid sedatives prior to arrival was common (63.3% of episodes) and predicted membership in cluster B (aOR 2.75, 95% CI 1.40, 5.40) and cluster C (aOR 3.38, 95% CI 1.48, 7.70). In comparison to cluster A episodes, cluster C episodes were longer (mean 4.8 vs. 2.3 hours, p < 0.001) and more likely to require supplemental oxygen (27.3% vs. 2.5%, p < 0.001). Few episodes required hospital transfer (4.7%) or naloxone (1.0%). No deaths occurred. Conclusions: In a medically supervised overdose monitoring program, reported use of non-opioid sedatives strongly predicted more complex clinical courses and should be factored into overdose prevention efforts. Low-threshold medical monitoring in an ambulatory setting was sufficient for most episodes, suggesting a role for such programs in reducing harm and averting costly emergency services.

Phylogenetic analysis of SARS-CoV-2 in Boston highlights the impact of superspreading events

Analysis of 772 complete severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genomes from early in the Boston-area epidemic revealed numerous introductions of the virus, a small number of which led to most cases. The data revealed two superspreading events. One, in a skilled nursing facility, led to rapid transmission and significant mortality in this vulnerable population but little broader spread, whereas other introductions into the facility had little effect. The second, at an international business conference, produced sustained community transmission and was exported, resulting in extensive regional, national, and international spread. The two events also differed substantially in the genetic variation they generated, suggesting varying transmission dynamics in superspreading events. Our results show how genomic epidemiology can help to understand the link between individual clusters and wider community spread.

Principles of Harm Reduction for Young People Who Use Drugs

In summarizing the proceedings of a longitudinal meeting of experts on substance use disorders among adolescents and young adults, we review 2 principles of care related to harm reduction for young adults with substance use disorders. The first is that harm reduction services are critical to keeping young adults alive and healthy and can offer opportunities for future engagement in treatment. Such services therefore should be offered at every opportunity, regardless of an individual's interest or ability to minimize use of substances. The second is that all evidence-based harm reduction strategies available to older adults should be available to young adults and that whenever possible, harm reduction programs should be tailored to young adults and be developmentally appropriate.

Clinical Outcomes, Costs, and Cost-effectiveness of Strategies for Adults Experiencing Sheltered Homelessness During the COVID-19 Pandemic

IMPORTANCE

Approximately 356 000 people stay in homeless shelters nightly in the United States. They have high risk of contracting coronavirus disease 2019 (COVID-19).

OBJECTIVE

To assess the estimated clinical outcomes, costs, and cost-effectiveness associated with strategies for COVID-19 management among adults experiencing sheltered homelessness.

DESIGN, SETTING, AND PARTICIPANTS

This decision analytic model used a simulated cohort of 2258 adults residing in homeless shelters in Boston, Massachusetts. Cohort characteristics and costs were adapted from Boston Health Care for the Homeless Program. Disease progression, transmission, and outcomes data were taken from published literature and national databases. Surging, growing, and slowing epidemics (effective reproduction numbers [Re], 2.6, 1.3, and 0.9, respectively) were examined. Costs were from a health care sector perspective, and the time horizon was 4 months, from April to August 2020.

EXPOSURES

Daily symptom screening with polymerase chain reaction (PCR) testing of individuals with positive symptom screening results, universal PCR testing every 2 weeks, hospital-based COVID-19 care, alternative care sites (ACSs) for mild or moderate COVID-19, and temporary housing were each compared with no intervention.

MAIN OUTCOMES AND MEASURES

Cumulative infections and hospital-days, costs to the health care sector (US dollars), and cost-effectiveness, as incremental cost per case of COVID-19 prevented.

RESULTS

The simulated population of 2258 sheltered homeless adults had a mean (SD) age of 42.6 (9.04) years. Compared with no intervention, daily symptom screening with ACSs for pending tests or confirmed COVID-19 and mild or moderate disease was associated with 37% fewer infections (1954 vs 1239) and 46% lower costs ($6.10 million vs $3.27 million) at an Re of 2.6, 75% fewer infections (538 vs 137) and 72% lower costs ($1.46 million vs $0.41 million) at an Re of 1.3, and 51% fewer infections (174 vs 85) and 51% lower costs ($0.54 million vs $0.26 million) at an Re of 0.9. Adding PCR testing every 2 weeks was associated with a further decrease in infections; incremental cost per case prevented was $1000 at an Re of 2.6, $27 000 at an Re of 1.3, and $71 000 at an Re of 0.9. Temporary housing with PCR every 2 weeks was most effective but substantially more expensive than other options. Compared with no intervention, temporary housing with PCR every 2 weeks was associated with 81% fewer infections (376) and 542% higher costs ($39.12 million) at an Re of 2.6, 82% fewer infections (95) and 2568% higher costs ($38.97 million) at an Re of 1.3, and 59% fewer infections (71) and 7114% higher costs ($38.94 million) at an Re of 0.9. Results were sensitive to cost and sensitivity of PCR and ACS efficacy in preventing transmission.

CONCLUSIONS AND RELEVANCE

In this modeling study of simulated adults living in homeless shelters, daily symptom screening and ACSs were associated with fewer severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections and decreased costs compared with no intervention. In a modeled surging epidemic, adding universal PCR testing every 2 weeks was associated with further decrease in SARS-CoV-2 infections at modest incremental cost and should be considered during future surges.

Community Care in Reach: Mobilizing Harm Reduction and Addiction Treatment Services for Vulnerable Populations

Opioid overdoses killed 47,600 people in the United States in 2017. Despite increasing availability of office-based addiction treatment programs, the prevalence of opioid overdose is historically high and disproportionately affects vulnerable populations, including people experiencing homelessness. Despite availability of effective treatment, many at greatest risk of death from overdose experience myriad barriers to care. Launched in 2018, the Community Care in Reach mobile health initiative uses a data-driven approach to bring harm reduction and medication for opioid use disorder directly to those at highest risk of near-term death. Proof-of-concept results suggest that mobile addiction services may serve as a model for expanding access to addiction care for the most vulnerable.

Clinical Outcomes, Costs, and Cost-effectiveness of Strategies for People Experiencing Sheltered Homelessness During the COVID-19 Pandemic

Importance:

Approximately 356,000 people stay in homeless shelters nightly in the US. They are at high risk for COVID-19.

Objective:

To assess clinical outcomes, costs, and cost-effectiveness of strategies for COVID-19 management among sheltered homeless adults.

Design:

We developed a dynamic microsimulation model of COVID-19 in sheltered homeless adults in Boston, Massachusetts. We used cohort characteristics and costs from Boston Health Care for the Homeless Program. Disease progression, transmission, and outcomes data were from published literature and national databases. We examined surging, growing, and slowing epidemics (effective reproduction numbers [R_e] 2.6, 1.3, and 0.9). Costs were from a health care sector perspective; time horizon was 4 months, from April to August 2020.

Setting & Participants:

Simulated cohort of 2,258 adults residing in homeless shelters in Boston.

Interventions:

We assessed daily symptom screening with polymerase chain reaction (PCR) testing of screen-positives, universal PCR testing every 2 weeks, hospital-based COVID-19 care, alternate care sites [ACSs] for mild/moderate COVID-19, and temporary housing, each compared to no intervention.

Main Outcomes and Measures:

Cumulative infections and hospital-days, costs to the health care sector (US dollars), and cost-effectiveness, as incremental cost per case prevented of COVID-19.

Results:

We simulated a population of 2,258 sheltered homeless adults with mean age of 42.6 years. Compared to no intervention, daily symptom screening with ACSs for pending tests or confirmed COVID-19 and mild/moderate disease led to 37% fewer infections and 46% lower costs (R_e=2.6), 75% fewer infections and 72% lower costs (R_e=1.3), and 51% fewer infections and 51% lower costs (R_e=0.9). Adding PCR testing every 2 weeks further decreased infections; incremental cost per case prevented was $1,000 (R_e=2.6), $27,000 (R_e=1.3), and $71,000 (R_e=0.9). Temporary housing with PCR every 2 weeks was most effective but substantially more costly than other options. Results were sensitive to cost and sensitivity of PCR and ACS efficacy in preventing transmission.

Conclusions & Relevance:

In this modeling study of simulated adults living in homeless shelters, daily symptom screening and ACSs were associated with fewer COVID-19 infections and decreased costs compared with no intervention. In a modeled surging epidemic, adding universal PCR testing every 2 weeks was associated with further decrease in COVID-19 infections at modest incremental cost and should be considered during future surges.

Phylogenetic analysis of SARS-CoV-2 in the Boston area highlights the role of recurrent importation and superspreading events

SARS-CoV-2 has caused a severe, ongoing outbreak of COVID-19 in Massachusetts with 111,070 confirmed cases and 8,433 deaths as of August 1, 2020. To investigate the introduction, spread, and epidemiology of COVID-19 in the Boston area, we sequenced and analyzed 772 complete SARS-CoV-2 genomes from the region, including nearly all confirmed cases within the first week of the epidemic and hundreds of cases from major outbreaks at a conference, a nursing facility, and among homeless shelter guests and staff. The data reveal over 80 introductions into the Boston area, predominantly from elsewhere in the United States and Europe. We studied two superspreading events covered by the data, events that led to very different outcomes because of the timing and populations involved. One produced rapid spread in a vulnerable population but little onward transmission, while the other was a major contributor to sustained community transmission, including outbreaks in homeless populations, and was exported to several other domestic and international sites. The same two events differed significantly in the number of new mutations seen, raising the possibility that SARS-CoV-2 superspreading might encompass disparate transmission dynamics. Our results highlight the failure of measures to prevent importation into MA early in the outbreak, underscore the role of superspreading in amplifying an outbreak in a major urban area, and lay a foundation for contact tracing informed by genetic data.

Phylogenetic analysis of SARS-CoV-2 in the Boston area highlights the role of recurrent importation and superspreading events

SARS-CoV-2 has caused a severe, ongoing outbreak of COVID-19 in Massachusetts with 111,070 confirmed cases and 8,433 deaths as of August 1, 2020. To investigate the introduction, spread, and epidemiology of COVID-19 in the Boston area, we sequenced and analyzed 772 complete SARS-CoV-2 genomes from the region, including nearly all confirmed cases within the first week of the epidemic and hundreds of cases from major outbreaks at a conference, a nursing facility, and among homeless shelter guests and staff. The data reveal over 80 introductions into the Boston area, predominantly from elsewhere in the United States and Europe. We studied two superspreading events covered by the data, events that led to very different outcomes because of the timing and populations involved. One produced rapid spread in a vulnerable population but little onward transmission, while the other was a major contributor to sustained community transmission, including outbreaks in homeless populations, and was exported to several other domestic and international sites. The same two events differed significantly in the number of new mutations seen, raising the possibility that SARS-CoV-2 superspreading might encompass disparate transmission dynamics. Our results highlight the failure of measures to prevent importation into MA early in the outbreak, underscore the role of superspreading in amplifying an outbreak in a major urban area, and lay a foundation for contact tracing informed by genetic data.

Addressing COVID-19 Among People Experiencing Homelessness: Description, Adaptation, and Early Findings of a Multiagency Response in Boston

People experiencing homelessness are at high risk for coronavirus disease 2019 (COVID-19). In March 2020, Boston Health Care for the Homeless Program, in partnership with city and state public health agencies, municipal leaders, and homeless service providers, developed and implemented a citywide COVID-19 care model for this vulnerable population. Components included symptom screening at shelter front doors, expedited testing at pop-up sites, isolation and management venues for symptomatic people under investigation and for people with confirmed disease, quarantine venues for asymptomatic exposed people, and contact investigation and tracing. Real-time disease surveillance efforts in a large shelter outbreak of COVID-19 during the third week of operations illustrated the need for several adaptations to the care model to better respond to the local epidemiology of illness among people experiencing homelessness. Symptom screening was de-emphasized given the high number of asymptomatic or minimally symptomatic infections discovered during mass testing; contact tracing and quarantining were phased out under the assumption of universal exposure among the sheltered population; and isolation and management venues were rapidly expanded to accommodate a surge in people with newly diagnosed COVID-19. During the first 6 weeks of operation, 429 of 1297 (33.1%) tested people were positive for COVID-19; of these, 395 people were experiencing homelessness at the time of testing, representing about 10% of the homeless adult population in Boston. Universal testing, as resources permit, is a focal point of ongoing efforts to mitigate the effect of COVID-19 on this vulnerable group of people.

Prevalence of SARS-CoV-2 Infection in Residents of a Large Homeless Shelter in Boston

This study characterizes the prevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection detected on polymerase chain reaction (PCR) screening of a large homeless shelter population in Boston prompted by an outbreak of COVID-19 cases among shelter residents.

Electronic medical record implementation for a healthcare system caring for homeless people

Objective

Electronic medical record (EMR) implementation at centers caring for homeless people is constrained by limited resources and the increased disease burden of the patient population. Few informatics articles address this issue. This report describes Boston Health Care for the Homeless Program’s migration to new EMR software without loss of unique care elements and processes.

Materials and methods

Workflows for clinical and operational functions were analyzed and modeled, focusing particularly on resource constraints and comorbidities. Workflows were optimized, standardized, and validated before go-live by user groups who provided design input. Software tools were configured to support optimized workflows. Customization was minimal. Training used the optimized configuration in a live training environment allowing users to learn and use the software before go-live.

Results

Implementation was rapidly accomplished over 6 months. Productivity was reduced at most minimally over the initial 3 months. During the first full year, quality indicator levels were maintained. Keys to success were completing before go-live workflow analysis, workflow mapping, building of documentation templates, creation of screen shot guides, role-based phased training, and standardization of processes. Change management strategies were valuable. The early availability of a configured training environment was essential. With this methodology, the software tools were chosen and workflows optimized that addressed the challenges unique to caring for homeless people.

Conclusions

Successful implementation of an EMR to care for homeless people was achieved through detailed workflow analysis, optimizing and standardizing workflows, configuring software, and initiating training all well before go-live. This approach was particularly suitable for a homeless population.

Self-reported Animal and Ectoparasite Exposure among Urban Homeless People

Homeless people in the United States may experience poor hygiene and spend extended periods of time outdoors, which increases exposure to animal and insect vectors of disease. Despite these risks, efforts to understand frequency and risk factors for zoonotic and vector-borne infections among homeless people have been limited. We queried homeless people in Boston, Massachusetts (n=194) to evaluate exposure to urban wildlife and ectoparasites associated with infection. Thirty percent of participants reported seeing rodents daily, and 25% reported daily sightings of cats. Body lice and fleas were reported by 4% and 11% of participants, respectively. Sleeping outdoors and heavy drinking were positively associated with rodent and ectoparasite exposure. Frequent sightings of rodents and rodent feces among homeless people in particular areas may indicate human exposure risk to urban rodent-borne pathogens, including Leptospira spp, Seoul hantavirus, and Rickettsia akari. Epidemiologic studies of zoonotic and vector-borne infections in this population are warranted.

Needs Assessment of HCV-Infected Individuals Experiencing Homelessness and Implications

The advent of tolerable, efficacious therapies for hepatitis C virus (HCV) creates an opportunity to provide HCV treatment for individuals experiencing homelessness. A federally-qualified community health center serving individuals experiencing homelessness in Boston conducted an anonymous needs assessment survey of a sample of HCV-infected patients in order to inform development of an HCV treatment program (N = 240). Primary care providers (PCPs) were identified as the chief source of HCV education. Main motivators to consider HCV treatment were identified as "taking care of your health" (73.5%) and "your provider says you should get treated" (53.6%). Interest and confidence to complete HCV treatment were high. The majority of respondents (51.4%) preferred to receive HCV treatment in the primary care setting. Preference for PCP-based treatment was significant compared to liver specialty-based treatment (30.8%, p &lt; .0001). This is the first assessment of its kind describing the preferences of homeless individuals concerning hepatitis C treatment.

Prevalence of Housing Problems Among Community Health Center Patients

This study uses national survey data to assess the prevalence and health-related correlates of housing problems among community health center patients.

Changes in public order after the opening of an overdose monitoring facility for people who inject drugs

BACKGROUND

In the face of an increasingly fatal opioid crisis, Boston Health Care for the Homeless Program (BHCHP) opened the Supportive Place for Observation and Treatment (SPOT), a unique low-threshold harm reduction program for monitoring people who have injected drugs and are at imminent risk of overdose. This study examines the impact of the opening of the SPOT program on measures of injection drug-related public order in the neighborhood surrounding the facility.

METHODS

Data was collected at 10 weeks prior and 12 weeks post SPOT implementation on: number of over-sedated individuals in public, publicly discarded syringes, publicly discarded injection-related litter, and instances of active injection drug use or exchange of drugs. Changes were evaluated using Poisson log-linear regression models. Potential confounders such as weather and police presence were measured and controlled for.

RESULTS

The average number of over-sedated individuals observed in public significantly decreased by 28% (4.3 [95% Confidence Interval (CI) 2.7-6.9] v 3.1 [CI 1.4-6.8]) after SPOT opened. The opening of SPOT did not have a significant effect on the other measures of public order. The daily average number of publicly discarded syringes (28.5 [CI 24.5-33.1] v 28.4 [CI 22.0-36.5]), pieces of publicly discarded injection-related litter (376.3 [CI 358.6-394.8] v 375.0 [CI 345.8-406.6]), and observed instances of active use or exchange of drugs (0.2 [CI 0.1-0.9] v 0.1 [CI 0.0-0.1]) were not statistically significantly different after the opening of SPOT.

CONCLUSIONS

The opening of SPOT was associated with a significant decrease in observed over-sedated individuals. Other measures of injection-drug related public order did not improve or worsen with the opening of SPOT, however, they have been shown to improve with the implementation of a supervised injection facility.

The willingness of people who inject drugs in Boston to use a supervised injection facility

BACKGROUND

In Massachusetts, the number of opioid-related deaths has increased 350% since 2000. In the setting of increasing overdose deaths, one potential intervention is supervised injection facilities (SIFs). This study explores willingness of people who inject drugs in Boston to use a SIF and examines factors associated with willingness.

METHODS

A cross-sectional survey of a convenience sample of 237 people who inject drugs and utilize Boston's needle exchange program (NEP). The drop-in NEP provides myriad harm reduction services and referrals to addiction treatment. The survey was mostly self-administered (92%).

RESULTS

Results showed positive willingness to use a SIF was independently associated with use of heroin as main substance (odds ratio [OR]: 5.47; 95% confidence interval [CI]: 1.9-15.4; P = .0004), public injection (OR: 5.09; 95% CI: 1.8-14.3; P = .002), history of seeking substance use disorder (SUD) treatment (OR: 4.99; 95% CI: 1.2-21.1; P = .05), having heard of SIF (OR: 4.80; 95% CI: 1.6-14.8; P = .004), Hispanic ethnicity (OR: 4.22; 95% CI: 0.9-18.8; P = .04), frequent NEP use (OR: 4.18; 95% CI: 1.2-14.7; P = .02), current desire for SUD treatment (OR: 4.15; 95% CI: 1.2-14.7; P = .03), hepatitis C diagnosis (OR: 3.68; 95% CI: 1.2-10.1; P = .02), posttraumatic stress disorder (PTSD) diagnosis (OR: 3.27; 95% CI: 1.3-8.4; P = .01), report of at least 1 chronic medical diagnosis (hepatitis C, human immunodeficiency virus [HIV], hypertension, or diabetes) (OR: 3.27; 95% CI: 1.2-8.9; P = .02), and comorbid medical and mental health diagnoses (OR: 2.93; 95% CI: 1.2-7.4; P = .02).

CONCLUSIONS

Most respondents (91.4%) reported willingness to use a SIF. Respondents with substance use behavior reflecting high risk for overdose were significantly more likely to be willing to use a SIF. Respondents with behaviors that contribute to public health burden of injection drug use were also significantly more likely to be willing to use a SIF. Results indicate that this intervention would be well utilized by individuals who could most benefit from the model. As part of a broader public health approach, SIFs should be considered to reduce opioid overdose mortality, decrease public health burden of the opioid crisis, and promote access to addiction treatment and medical care.

Personal Hygiene Practices among Urban Homeless Persons in Boston, MA

Persons experiencing homelessness in the United States experience significant barriers to self-care and personal hygiene, including limited access to clean showers, laundry and hand washing facilities. While the obstacles to personal hygiene associated with homelessness may increase risk of infectious disease, hygiene-related behaviors among people experiencing homelessness has received limited attention. We conducted a cross-sectional study of individuals experiencing homelessness in Boston, MA (n = 194) to identify hygiene-related self-care practices and risk factors for reduced hygiene in this population. Most participants (72%) reported taking a daily shower. More than 60% reported hand washing with soap five or more times each day, and use of hand sanitizer was widespread (89% reported using sanitizer in the last week). A majority (86%) used a laundromat or laundry machine to wash clothing, while 14% reported washing clothing in the sink. Heavy drinking, injection drug use, and sleeping outdoors were identified as significant risk factors for reduced hygiene practices. People experiencing homelessness who also engage in these activities may be among the most difficult to reach for intervention, yet targeted efforts may decrease illness risk associated with reduced hygiene. Housed friends and family play a critical role in assisting homeless individuals maintain hygiene by providing showers and laundry facilities.

Prevalence and risk factors for MRSA nasal colonization among persons experiencing homelessness in Boston, MA

Homeless individuals face an elevated risk of methicillin-resistant Staphylococcus aureus (MRSA) infection. Identifying the prevalence and risk factors for MRSA nasal colonization may reduce infection risk. A cross-sectional study was conducted at a health clinic for homeless persons in Boston, MA, USA (n=194). In-person interviews and nasal swab specimens were collected. MRSA isolates were genotyped using pulse-field gel electrophoresis (PFGE) and assessed for antibiotic susceptibility. The prevalence of MRSA nasal colonization was 8.3 %. Seventy-five percent of isolates reflected clonal similarity to USA300. USA100 (18.8 %) and USA500 (6.3 %) were also recovered. Resistance to erythromycin (81.3 %), levofloxacin (31.3 %) and clindamycin (23.1 %) was identified. Recent inpatient status, endocarditis, haemodialysis, heavy drinking, not showering daily and transience were positively associated with MRSA nasal colonization. Carriage of community-acquired MRSA strains predominated in this population, although nosocomial strains co-circulate. Attention to behavioural and hygiene-related risk factors, not typically included in MRSA prevention efforts, may reduce risk.

Homeless Individuals Approaching the End of Life: Symptoms and Attitudes

CONTEXT

Over a million individuals in the United States experience homelessness annually and homeless individuals die at a higher rate than domiciled peers. Homeless individuals often have unique experiences at the end of life (EOL).

OBJECTIVES

This study examined the symptoms experienced by homeless individuals nearing the EOL and explored social background, attitudes, and experiences.

METHODS

Investigators conducted surveys of homeless individuals approaching the EOL at a medical respite home. Eligibility required a serious medical condition and for the patient's medical provider to answer "no" to the question "Would you be surprised if this patient were not alive in one year?" Interviews explored symptoms using the Memorial Symptom Assessment Survey. Symptoms were compared with those of relevant comparator groups in other studies.

RESULTS

Participants (n = 20) were young to face the EOL (median age = 58) and suffered high rates of substance use disorders (n = 18; 90%) and psychiatric diagnoses (n = 16; 80%). Symptom frequency was high, especially as regarded pain and psychological symptoms. Previous experience with death among family and peers was universal (n = 20; 100%). Mistrust of others' decisions about the EOL was common, as was concern about receiving too little (n = 11; 55%) or too much (n = 8; 40%) care at the EOL. The frequency of symptoms was higher than in three comparator studies and those studies' subgroups (P < 0.01 for each comparison).

CONCLUSION

Homeless individuals may experience a high frequency of pain and other symptoms as they approach the EOL. Care for such individuals may require a tailored approach.

Zoonotic and Vector-Borne Infections Among Urban Homeless and Marginalized People in the United States and Europe, 1990-2014

INTRODUCTION

In high-income countries, homeless individuals in urban areas often live in crowded conditions with limited sanitation and personal hygiene. The environment of homelessness in high-income countries may result in intensified exposure to ectoparasites and urban wildlife, which can transmit infections. To date, there have been no systematic evaluations of the published literature to assess vector-borne and zoonotic disease risk to these populations.

OBJECTIVES

The primary objectives of this study were to identify diversity, prevalence, and risk factors for vector-borne and zoonotic infections among people experiencing homelessness and extreme poverty in urban areas of high-income countries.

METHODS

We conducted a systematic review and narrative synthesis of published epidemiologic studies of zoonotic and vector-borne infections among urban homeless and very poor people in the United States and Europe from 1990 to 2014.

RESULTS

Thirty-one observational studies and 14 case studies were identified (n = 45). Seroprevalence to the human louse-borne pathogen Bartonella quintana (seroprevalence range: 0-37.5%) was identified most frequently, with clinical disease specifically observed among HIV-positive individuals. Seropositivity to Bartonella henselae (range: 0-10.3%) and Rickettsia akari (range: 0-16.2%) was noted in multiple studies. Serological evidence of exposure to Rickettsia typhi, Rickettsia prowazekii, Bartonella elizabethae, West Nile virus, Borellia recurrentis, lymphocytic choriomeningitis virus, Wohlfartiimonas chitiniclastica, Seoul hantavirus (SEOV), and Leptospira species was also identified in published studies, with SEOV associated with chronic renal disease later in life. HIV infection, injection drug use, and heavy drinking were noted across multiple studies as risk factors for infection with vector-borne and zoonotic pathogens.

CONCLUSIONS

B. quintana was the most frequently reported vector-borne infection identified in our article. Delousing efforts and active surveillance among HIV-positive individuals, who are at elevated risk of complication from B. quintana infection, are advised to reduce morbidity. Given documented exposure to rodent-borne zoonoses among urban homeless and marginalized people, reducing human contact with rodents remains an important public health priority.

Homelessness, HIV, and Incomplete Viral Suppression

BACKGROUND

The importance of HIV viral suppression is widely known, however few studies have examined the effects of homelessness on HIV viral suppression.

METHODS

The study included HIV-seropositive patients in a health care for the homeless program (HCH). Electronic medical record data for 138 patients were analyzed to compare demographic characteristics, health characteristics, and utilization by housing status. For the 95 individuals with available HIV viral loads, multivariable logistic analysis was performed to examine factors associated with incomplete viral suppression.

RESULTS

The adjusted odds ratio of incomplete HIV viral load suppression was 3.84 times higher in homeless compared with housed (95% CI 1.36- 10.36) individuals. Illicit drug use and combined antiretrovirals (cART) were associated with HIV viral suppression.

CONCLUSIONS

Homelessness predicted incomplete HIV viral suppression. Stable housing may improve viral suppression and access to cART. Drug use was associated with viral suppression, likely because of patient engagement with on-site addiction services.

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.

Predictors of Frequent Emergency Room Visits among a Homeless Population

Background

Homelessness, HIV, and substance use are interwoven problems. Furthermore, homeless individuals are frequent users of emergency services. The main purpose of this study was to identify risk factors for frequent emergency room (ER) visits and to examine the effects of housing status and HIV serostatus on ER utilization. The second purpose was to identify risk factors for frequent ER visits in patients with a history of illicit drug use.

Methods

A retrospective analysis was performed on 412 patients enrolled in a Boston-based health care for the homeless program (HCH). This study population was selected as a 2:1 HIV seronegative versus HIV seropositive match based on age, sex, and housing status. A subgroup analysis was performed on 287 patients with history of illicit drug use. Chart data were analyzed to compare demographics, health characteristics, and health service utilization. Results were stratified by housing status. Logistic models using generalized estimating equations were used to predict frequent ER visits.

Results

In homeless patients, hepatitis C was the only predictor of frequent ER visits (OR 4.49, p<0.01). HIV seropositivity was not predictive of frequent ER visits. In patients with history of illicit drug use, mental health (OR 2.53, 95% CI 1.07–5.95) and hepatitis C (OR 2.85, 95% CI 1.37–5.93) were predictors of frequent ER use. HIV seropositivity did not predict ER use (OR 0.45, 95% CI 0.21 – 0.97).

Conclusions

In a HCH population, hepatitis C predicted frequent ER visits in homeless patients. HIV seropositivity did not predict frequent ER visits, likely because HIV seropositive HCH patients are engaged in care. In patients with history of illicit drug use, hepatitis C and mental health disorders predicted frequent ER visits. Supportive housing for patients with mental health disorders and hepatitis C may help prevent unnecessary ER visits in this population.

Beneficial effects of intracoronary thrombolysis up to eighteen hours after onset of pain in evolving myocardial infarction

Coronary arteriography and intracoronary streptokinase (STK) infusion were performed on 89 patients with evolving acute myocardial infarction (AMI). Ventricular function was followed in these patients during their hospitalization by gated radionuclide ventriculography. In 35 of these patients thallium imaging was performed on admission and 4 hours after reperfusion. An additional 30 patients with AMI who either met exclusion criteria for the STK protocol or refused study served as a control group. In patients admitted 0 to 6, 6 to 12, or 12 to 18 hours after onset of pain, there was no difference in change in left ventricular ejection fraction (LVEF) from admission to discharge, in percent of patients with total occlusion demonstrating reperfusion, or in percent of patients demonstrating a significant increase in LVEF. The average increase in LVEF from admission to discharge in patients reperfused ws 8% (40% +/- 14% to 48% +/- 13%, p less than 0.001). No change in LVEF was demonstrated in the control population or in patients in whom coronary reperfusion was unsuccessful. Reperfusion produced an increase in thallium uptake in the infarct-related myocardium that was accompanied by an improvement in regional function. Failure of reperfusion produced no change in either thallium uptake or regional function.

Coronary artery reperfusion in acute myocardial infarction: beneficial effects of intracoronary streptokinase on left ventricular salvage and performance

Coronary angiography was performed on hospital admission in 37 patients with acute myocardial infarction (AMI). Thirty patients had total occlusion of the infarct-related coronary artery and seven patients had severe proximal stenoses with poor distal flow. In 20 of 30 patients with total occlusion, intracoronary (IC) infusion of streptokinase (SK) resulted in reperfusion of the distal coronary artery. Left ventricular (LV) performance was assessed before coronary angiography and at discharge from the hospital by use of gated cardiac blood pool imaging techniques. In patients evidencing reperfusion of the infarct-related coronary artery, mean (+/- SD) left ventricular ejection fraction (LVEF) increased from admission through discharge (46% +/- 15% to 55% +/- 10%, p = 0.002). In contrast, LVEF did not change from admission through discharge in patients with severe proximal stenoses alone or in patients with total occlusion who did not demonstrate reperfusion following SK administration (47% +/- 17% vs 49% +/- 18%, p = ns). In an additional 14 control patients with AMI who were not evaluated with coronary angiography, LVEF did not change from admission through discharge (46% +/- 12% vs 48% +/- 14%, p = ns). Quantitative thallium-201 perfusion imaging demonstrated an increase (p less than 0.05) in thallium uptake in the infarct segment following coronary artery reperfusion. In contrast, thallium uptake did not change (p = ns) in the infarct segment in patients not evidencing angiographic coronary artery reperfusion. These data support the following : (1) Coronary artery thrombus occurs frequently in AMI and can be lysed by IC SK, and (2) reperfusion with IC SK in patients with evolving myocardial infarction results in myocardial salvage and improved LV performance through hospital discharge.