A cohort study examining emergency department visits and hospital admissions among people who use drugs in Ottawa, Canada

Opioid-specific harm reduction in the emergency department: how staff provide harm reduction and contextual factors that impact their capacity to engage in harm reduction practice

BACKGROUND

Emergency Departments (ED) staff, including nurses and physicians, are most directly involved in the care of people who use unregulated substances, and are ideally positioned to provide harm reduction interventions. Conceptualizing the ED as a complex adaptive system, this paper examines how ED staff experience opioid-specific harm reduction provision and engage in harm reduction practice, including potential facilitators and barriers to engagement.

METHODS

Using a mixed methods approach, ED nurses and physicians completed a self-administered staff survey (n = 99) and one-on-one semi-structured interviews (n = 15). Five additional interviews were completed with clinical leaders. Survey data were analyzed to generate descriptive statistics and to compute scale scores. De-identified interview data were analyzed using a reflexive thematic analysis approach, which was informed by the theory of complex adaptive systems, as well as understandings of harm reduction as both a technical solution and a contextualized social practice. The final analysis involved mixed analysis through integrating both quantitative and qualitative data to generate overarching analytical themes.

RESULTS

Study findings illustrated that, within the context of the ED as a complex adaptive system, three interrelated contextual factors shape the capacity of staff to engage in harm reduction practice, and to implement the full range of opioid-specific harm reduction interventions available. These factors include opportunities to leverage benefits afforded by working collaboratively with colleagues, adequate preparation through receiving the necessary education and training, and support in helping patients establish connections for ongoing care.

CONCLUSIONS

There is a need for harm reduction provision across all health and social care settings where people who use unregulated opioids access public sector services. In the context of the ED, attention to contextual factors including teamwork, preparedness, and connections is warranted to support that ED staff engage in harm reduction practice.

The effect of Montreal's supervised consumption sites on injection-related infections among people who inject drugs: An interrupted time series

BACKGROUND

Between June and November 2017, four supervised consumption sites (SCS) began operating in Montreal, Quebec. Earlier studies on SCS focused on examining their effects on blood-borne viral infections and overdose mortality. Our objective was to examine the effect of Montreal's SCS on the incidence, health service use and outcomes of injection-related infections (IRI) in people who inject drugs.

METHODS

We used Quebec's provincial administrative health data to identify people who inject drugs in Montreal and calculated the incidence of IRI in this population between December 2014 and December 2019. We conducted a retrospective, population-based interrupted time series to estimate the effect of Montreal's four SCS on the monthly incidence rates of IRI-related hospitalizations, emergency department (ED) visits, physician visits, and mortality. We also examined the effects of SCS on average length of IRI-related hospitalizations and incidence of hospitalizations involving surgery.

RESULTS

The average age of Montreal's people who inject drugs was 41.84 years, and 66.41% were male. After the implementation of SCS, there was a positive level change in the incidence of hospitalizations (0.97; 95% confidence interval [CI]: 0.26, 1.68) for IRI. There was also a significant post-intervention decline in hospitalization trends (-0.05; 95% CI: -0.08, -0.02), with modest trend changes in ED visits (-0.02; 95% CI: -0.05, 0.02). However, post-intervention changes in level (0.72; 95% CI: -3.85, 5.29) and trend (0.06; 95% CI: -0.23, 0.34) for physician visits remained limited. SCS had no effect on the average length of hospitalizations, but there was a decreasing post-intervention trend in hospitalizations involving surgery (-0.03; 95% CI: -0.06, 0.00).

CONCLUSION

Following the opening of the SCS, there was a moderate decline in the rate of hospitalizations to treat IRI, but the impact of the sites on the rate of physician visits remained limited. These findings suggest that SCS may mitigate the incidence of more serious and complicated IRI over time.

Economic evaluation of the effect of needle and syringe programs on skin, soft tissue, and vascular infections in people who inject drugs: a microsimulation modelling approach

BACKGROUND

Needle and syringe programs (NSP) are effective harm-reduction strategies against HIV and hepatitis C. Although skin, soft tissue, and vascular infections (SSTVI) are the most common morbidities in people who inject drugs (PWID), the extent to which NSP are clinically and cost-effective in relation to SSTVI in PWID remains unclear. The objective of this study was to model the clinical- and cost-effectiveness of NSP with respect to treatment of SSTVI in PWID.

METHODS

We performed a model-based, economic evaluation comparing a scenario with NSP to a scenario without NSP. We developed a microsimulation model to generate two cohorts of 100,000 individuals corresponding to each NSP scenario and estimated quality-adjusted life-years (QALY) and cost (in 2022 Canadian dollars) over a 5-year time horizon (1.5% per annum for costs and outcomes). To assess the clinical effectiveness of NSP, we conducted survival analysis that accounted for the recurrent use of health care services for treating SSTVI and SSTVI mortality in the presence of competing risks.

RESULTS

The incremental cost-effectiveness ratio associated with NSP was $70,278 per QALY, with incremental cost and QALY gains corresponding to $1207 and 0.017 QALY, respectively. Under the scenario with NSP, there were 788 fewer SSTVI deaths per 100,000 PWID, corresponding to 24% lower relative hazard of mortality from SSTVI (hazard ratio [HR] = 0.76; 95% confidence interval [CI] = 0.72-0.80). Health service utilization over the 5-year period remained lower under the scenario with NSP (outpatient: 66,511 vs. 86,879; emergency department: 9920 vs. 12,922; inpatient: 4282 vs. 5596). Relatedly, having NSP was associated with a modest reduction in the relative hazard of recurrent outpatient visits (HR = 0.96; 95% CI = 0.95-0.97) for purulent SSTVI as well as outpatient (HR = 0.88; 95% CI = 0.87-0.88) and emergency department visits (HR = 0.98; 95% CI = 0.97-0.99) for non-purulent SSTVI.

CONCLUSIONS

Both the individuals and the healthcare system benefit from NSP through lower risk of SSTVI mortality and prevention of recurrent outpatient and emergency department visits to treat SSTVI. The microsimulation framework provides insights into clinical and economic implications of NSP, which can serve as valuable evidence that can aid decision-making in expansion of NSP services.

Characterising individuals with a substance use disorder accessing hospital-based addiction care: Preliminary description of the outcomes for patients accessing addiction care prospective cohort study

INTRODUCTION

Individuals with a substance use disorder (SUD) often face barriers to accessing health care, resulting in unmet needs and delayed care. Hospital-based services have the potential to engage individuals with a SUD in ongoing treatment, but there is limited literature characterising this population.

METHODS

The Outcomes for Patients Accessing Addiction Care study was a prospective hospital-based cohort study conducted at St. Paul's Hospital in Vancouver, Canada. Participants were recruited from January 2018 to March 2020. Data were collected through an interviewer-administered questionnaire, including socio-demographic information, substance use history and mental health screening.

RESULTS

The cohort included 536 participants, with 31% aged 30-39 years, 63% identifying as White and 74% reporting male sex at birth. Nearly half of the participants were either homeless or living in single room occupancy. Use of substances more than once per week was reported for tobacco/nicotine (86%), marijuana (43%), non-medical use of prescription drugs (29%), illicit stimulants (52%) and illicit opioids (61%).

DISCUSSION AND CONCLUSION

This preliminary report provides a description of a hospital-based cohort of individuals with a SUD accessing addiction care. The findings highlight demographic characteristics, mental health issues, substance use patterns and barriers to accessing services. Understanding these factors can inform the development of patient-centred interventions and improve engagement and retention in addiction care. Further research is needed to explore interventions and program effectiveness in this population.

Validation of case-ascertainment algorithms using health administrative data to identify people who inject drugs in Ontario, Canada

OBJECTIVES

Health administrative data can be used to improve the health of people who inject drugs by informing public health surveillance and program planning, monitoring, and evaluation. However, methodological gaps in the use of these data persist due to challenges in accurately identifying injection drug use (IDU) at the population level. In this study, we validated case-ascertainment algorithms for identifying people who inject drugs using health administrative data in Ontario, Canada.

STUDY DESIGN AND SETTING

Data from cohorts of people with recent (past 12 months) IDU, including those participating in community-based research studies or seeking drug treatment, were linked to health administrative data in Ontario from 1992 to 2020. We assessed the validity of algorithms to identify IDU over varying look-back periods (ie, all years of data [1992 onwards] or within the past 1-5 years), including inpatient and outpatient physician billing claims for drug use, emergency department (ED) visits or hospitalizations for drug use or injection-related infections, and opioid agonist treatment (OAT).

RESULTS

Algorithms were validated using data from 15,241 people with recent IDU (918 in community cohorts and 14,323 seeking drug treatment). An algorithm consisting of ≥1 physician visit, ED visit, or hospitalization for drug use, or OAT record could effectively identify IDU history (91.6% sensitivity and 94.2% specificity) and recent IDU (using 3-year look back: 80.4% sensitivity, 99% specificity) among community cohorts. Algorithms were generally more sensitive among people who inject drugs seeking drug treatment.

CONCLUSION

Validated algorithms using health administrative data performed well in identifying people who inject drugs. Despite their high sensitivity and specificity, the positive predictive value of these algorithms will vary depending on the underlying prevalence of IDU in the population in which they are applied.

Understanding healthcare engagement for people who inject drugs

People who inject drugs (PWID) are at an increased risk of multimorbid mental health and chronic diseases, which are frequently underdiagnosed and under-treated due to systemic barriers and ongoing substance use. Healthcare engagement is essential to address these conditions and prevent excess morbidity and mortality. The goal of this study was to understand how PWID engage in care for their chronic health conditions and substance use treatment given the known historic and pervasive barriers. We conducted 24 semistructured qualitative interviews informed by the Behavioral Model for Vulnerable Populations between July-September 2019. Participants were sampled across a range of comorbidities, including co-occurring mental health disorders. Thematic analysis was conducted to explore experiences of healthcare engagement for multimorbid chronic diseases, mental health, and treatment for substance use disorder. Mean age for participants was 58 years; 63% reported male sex and 83% reported Black race. Interviews yielded themes regarding healthcare access and wraparound services, positive patient-provider relationships, service integration for substance use treatment and mental health, healthcare needs alignment, medication of opioid use disorder stigma, and acceptance of healthcare. Taken together, participants described how these themes enabled healthcare engagement. Engagement in care is crucial to support health and recovery. Clinical implications include the importance of strengthening patient-provider relationships, encouraging integration of medical and mental health services, and counseling on substance use treatment options in a non- stigmatizing manner. Additionally, policy to reimburse wrap-around support for substance use recovery can improve care engagement and outcomes related to chronic diseases, mental health, and substance use among PWID. No Patient or Public Contribution: While we acknowledge and thank ALIVE participants for their time for data collection and sharing their perspectives, no ALIVE participants, other people who use drugs, and service users were involved in data collection, analysis or interpretation of data, or in preparation of the manuscript.

Primary care nurse practitioner work environments and emergency department utilization among older adults with substance use disorders in rural areas

INTRODUCTION

The prevalence of substance use disorders (SUDs) is growing among older adults, and older adults in rural areas face disparities in access to SUD care. Rural older adults with SUDs commonly have comorbid chronic conditions that puts them at risk for frequent acute healthcare utilization. In rural areas, primary care for patients with SUDs are increasingly provided by nurse practitioners (NPs), and quality primary care services may decrease ED visits in this population. Yet, NP-delivered primary care for rural older adults with SUDs may be limited by work environment barriers, which include lack of support, autonomy, and visibility. This study assessed the relationship between the NP work environment and ED utilization among rural older adults with SUDs.

METHODS

This was a secondary analysis of cross-sectional data from a large survey of NPs in six U.S. states merged with Medicare claims. The study measured the NP work environment by the four subscales of the Nurse Practitioner Primary Care Organizational Climate Questionnaire (NP-PCOCQ), which measure 1) independent practice and support, 2) NP-physician relations, 3) NP-administration, and 4) professional visibility. Multilevel logistic regression models, adjusted for practice and patient covariates, assess the relationship between the NP work environment and all-cause ED use.

RESULTS

The sample included 1152 older adults with SUDs who received care at 126 rural NP primary care practices. NP independent practice and support at the practice was associated with 49 % lower odds of all-cause ED visits among older adults with SUDs. There were no relationships between the other NP-PCOCQ subscales and all-cause ED visits.

CONCLUSIONS

Organizational support for NP independent practice is associated with lower odds of all-cause ED utilization among rural older adults with SUDs. Practice administrators should ensure that NPs have access to support and resources to enhance their ability to care for rural older adults with SUDs. Ultimately, these practice changes could reduce ED utilization and health disparities in this population.

Making Harm Reduction More Accessible: Fentanyl Test Strip Awareness and Attitudes among Emergency Department Patients Who Use Drugs

BACKGROUND

Fentanyl test strips (FTS) are a harm reduction method for people to test their drugs for fentanyl. Ideal points for FTS distribution have not been identified. Many people who use drugs have frequent contact with the Emergency Department (ED). We piloted FTS distribution in two urban hospital EDs.

METHODS

Between June-December 2021 in Philadelphia, PA, patients with past 30-day drug use completed a survey about drug use, fentanyl attitudes, and FTS; then offered FTS and a brief training. Survey data were analyzed using SPSS for bivariate statistics.

RESULTS

Patients (n = 135) were primarily White (68.1%) and male (72.6%). Participants regularly interacted with substance use (57.8%) and benefits coordination (49.6%) services. The most common drugs used were heroin/fentanyl (68.9%), crack cocaine (45.2%) and cannabis (40.0%). Most (98.5%) had heard of fentanyl though few (18.5%) had ever used FTS. Across most drug types, participants were concerned about fentanyl. All accepted FTS training and distribution. Few (9.6%) were somewhat or very concerned about having FTS if stopped by police and this number varied by race (7.6% of White people were somewhat or very concerned, compared to 12.8% of Black people). Most participants were already engaged in risk reduction practices.

DISCUSSION

FTS are a widely desired harm reduction tool to facilitate informed decision-making, and non-harm reduction locations are potentially feasible and acceptable distribution sites. Given regular contact with EDs and social services across the sample, FTS should be offered at non-harm reduction locations that come into frequent contact with people who use drugs.

The Patient Perspective of an Inpatient Addiction Medicine Unit Implemented in an Urban Northern Acute Care Hospital in Ontario, Canada

Background

An Addiction Medicine Unit (AMU) represents a promising approach to enhancing hospital care for individuals who use substances, but there is limited research to understand patients' perspectives on AMUs. Therefore, the study objectives involved exploring patients' experiences with the AMU.

Methods

Qualitative semi-structured interviews were conducted with 17 patients to gather their perspectives about the AMU. The AMU offers specialized inpatient addiction support, integrating medical and psychosocial interventions while facilitating connections to community supports to stabilize patients and manage addiction-related issues using a harm reduction philosophy.

Results

Factors identified by patients that lead to positive experiences with the AMU included: efficient access to high-quality acute medical care, specialized addiction care, and additional support for non-medical needs. Patients emphasized the benefits of having peer support workers on staff, the overall positive interactions with staff, and how different these experiences were from their hospital admissions outside of the AMU. Factors identified by patients that should be considered in an AMU included: the ease of access to substances, negative interactions with other patients, and self-stigma/internalized discrimination. Also, the patient perspective reflected varied views on harm reduction. Patients' perception of the impact of an AMU overall reflected that the AMU is an effective way to deliver comprehensive treatment, to address the needs of PWUS, both medical and substance-use-related issues. They identified that the unit's intentional harm reduction philosophy facilitated access to care and positive patient-staff interactions, emphasizing the unit's progress in reducing fear and judgment and rebuilding trust in the healthcare system.

Conclusion

The introduction of a new AMU in a Northern urban acute care hospital in Ontario has yielded positive patient experiences. The AMU model shows potential to re-establish trust between patients and providers, but ongoing efforts are needed to address underlying stigma to be more effective.

Harm reduction strategies in acute care for people who use alcohol and/or drugs: A scoping review

BACKGROUND

People who use alcohol and/or drugs (PWUAD) are at higher risk of infectious disease, experiencing stigma, and recurrent hospitalization. Further, they have a higher likelihood of death once hospitalized when compared to people who do not use drugs and/or alcohol. The use of harm reduction strategies within acute care settings has shown promise in alleviating some of the harms experienced by PWUAD. This review aimed to identify and synthesize evidence related to the implementation of harm reduction strategies in acute care settings.

METHODS

A scoping review investigating harm reduction strategies implemented in acute care settings for PWUAD was conducted. A search strategy developed by a JBI-trained specialist was used to search five databases (Medline, Embase, CINAHL, PsychInfo and Scopus). Screening of titles, abstracts and full texts, and data extraction was done in duplicate by two independent reviewers. Discrepancies were resolved by consensus or with a third reviewer. Results were reported narratively and in tables. Both patients and healthcare decision makers contributing to the development of the protocol, article screening, synthesis and feedback of results, and the identification of gaps in the literature.

FINDINGS

The database search identified 14,580 titles, with 59 studies included in this review. A variety of intervention modalities including pharmacological, decision support, safer consumption, early overdose detection and turning a blind eye were identified. Reported outcome measures related to safer use, managed use, and conditions of use. Reported barriers and enablers to implementation related to system and organizational factors, patient-provider communication, and patient and provider perspectives.

CONCLUSION

This review outlines the types of alcohol and/or drug harm reduction strategies, which have been evaluated and/or implemented in acute care settings, the type of outcome measures used in these evaluations and summarizes key barriers and enablers to implementation. This review has the potential to serve as a resource for future harm reduction evaluation and implementation efforts in the context of acute care settings.

What makes a peer? Characteristics of certified peer recovery support specialists in an emergency department-based intervention

Providing brief interventions by certified peer recovery support specialists (CPRSS) in the emergency department (ED) following a drug related visit is a promising method of service engagement and has garnered national attention. This study examines CPRSS's perceptions of the qualities that enable them to deliver interventions in the ED. We conducted qualitative interviews with 14 CPRSSs working in EDs. Interview topics included how the participants became involved with CPRSS work, experiences working in the ED, how the ED differs from other settings, and what interactions with patients look like. Interviews were digitally recorded, transcribed, and analyzed for emerging categories. Three categories were identified relating to CPRSS work: (1) how they approach peer work, (2) inherent qualities required to do the work, regardless of the setting, and (3) context-specific skills required to do the work in the ED. When describing their approach to this work, participants talked about CPRSS work as their life calling and their passion. Participants also identified certain qualities that all CPRSS workers possess, regardless of the setting, including the ability to build rapport, strong listening skills, and a shared lived experience. Lastly, participants identified how specific hard and soft skills help them to navigate organizational and structural challenges in the ED. The unique conditions of the ED and the required qualities of a CPRSS should be considered when implementing an ED-based intervention.

Sex differences in acute health service contact after release from prison in Australia: a data linkage study

OBJECTIVES

Women released from prison typically experience worse health outcomes than their male counterparts. We examined sex differences in the patterns, characteristics, and predictors of acute health service contact (AHSC) (i.e. ambulance and/or emergency department use) after release from prison.

STUDY DESIGN

Data linkage study.

METHODS

Baseline survey data from 1307 adults (21% women) within six weeks of expected release from prisons in Queensland, Australia (2008-2010) were linked prospectively with state-wide ambulance and emergency department, correctional, mental health, and death records. Crude and adjusted incidence rates and incidence rate ratios of AHSC were calculated overall and by sex. An Andersen-Gill model was fit to examine whether sex predicted AHSC. The interaction effect between sex and each model covariate was tested.

RESULTS

The crude incidence rates of AHSC after release from prison were 1.4 (95% confidence interval [CI]: 1.3-1.5) and 1·1 (95%CI: 1.1-1.2) per person-year for women and men, respectively. The relationship between perceived physical health-related functioning at the baseline and AHSC was modified by sex (P = 0·039). The relationship between perceived health-related functioning and AHSC also differed among women. Compared to women who perceived their physical health as fair or good at the baseline, women who perceived their physical health as poor were at greater risk of AHSC (hazard ratio = 2.4, 95%CI: 1.4-3·9, P = 0.001) after release from prison.

CONCLUSIONS

Among people released from prison, women's and men's AHSC differs depending on how they perceive their own physical health. The specific needs of women and men must be considered in transitional support policy and planning to improve their health outcomes.

Qualitative Exploration of Emergency Department Care Experiences Among People With Opioid Use Disorder

STUDY OBJECTIVE

We described the experiences and preferences of people with opioid use disorder who access emergency department (ED) services regarding ED care and ED-based interventions.

METHODS

Between June and September 2020, we conducted phone or in-person semistructured qualitative interviews with patients recently discharged from 2 urban EDs in Vancouver, BC, Canada, to explore experiences and preferences of ED care and ED-based opioid use disorder interventions. We recruited participants from a cohort of adults with opioid use disorder who were participating in an ED-initiated outreach program. We transcribed audio recordings verbatim. We iteratively developed a thematic coding structure, with interim analyses to assess for thematic saturation. Two team members with lived experience of opioid use provided feedback on content, wording, and analysis throughout the study.

RESULTS

We interviewed 19 participants. Participants felt discriminated against for their drug use, which led to poorer perceived health care and downstream ED avoidance. Participants desired to be treated like ED patients who do not use drugs and to be more involved in their ED care. Participants nevertheless felt comfortable discussing their substance use with ED staff and valued continuous ED operating hours. Regarding opioid use disorder treatment, participants supported ED-based buprenorphine/naloxone programs but also suggested additional options (eg, different initiation regimens and settings and other opioid agonist therapies) to facilitate further treatment uptake.

CONCLUSION

Based on participant experiences, we recommend addressing potentially stigmatizing practices, increasing patient involvement in their care during ED visits, and increasing access to various opioid use disorder-related treatments and community support.

Caring for patients with substance use disorders: a qualitative investigation of difficulties encountered by hospital-based clinicians

Background: Caring for patients with substance use disorders (SUD) is held in low regard and many clinicians resist treating them. To address this situation, numerous research projects assessed training program gaps and professional attitudes. In contrast, this study explored the actual clinical difficulties that a variety of hospital-based professionals encounter when treating patients with SUD. Methods: Qualitative multiple method design including: (1) individual semi-structured interviews with SUD experts and educators; (2) video-elicited, cross self-confrontation interviews with clinicians working in a specialist addiction unit; (3) paired semi-structured interviews with clinicians working in non-specialist units. Participants were recruited within one university hospital. Data collected at stages (1) and (3) relied on an interview guide and were analyzed using conventional content analyses. Data collected at stage (2) consisted of discussions of video recorded clinical interviews and were analyzed based on a participatory approach. Results: Twenty-three clinicians from seven hospital units participated. Forty-four difficulties were reported that we classified into six categories: knowledge-based; moral; technical; relational; identity-related; institutional. We identified seven cross-category themes as key features of SUD clinical complexity: exacerbation of patient characteristics; multiplication of medical issues; hybridity and specificity of medical discipline; experiences of stalemate, adversity, and role reversal. Conclusions: Our study, providing a comprehensive analysis of the difficulties of caring for patients with SUD, reveals a highly challenging clinical practice for a diversity of healthcare providers. They represent a complementary approach to addressing resistance as an important feature of a complex clinical system, and valuable material to discussing professional preparedness.

Interventions to Reduce Repeat Presentations to Hospital Emergency Departments for Mental Health Concerns: A Scoping Review of the Literature

BACKGROUND

The number of readmissions to the emergency department (ED) for mental health services each year is significant, which increases healthcare costs and negatively affects the morale and quality of life of patients and their families.

OBJECT

This scoping review aimed to establish a better understanding of interventions that have been implemented to reduce psychiatric patient readmission and ED use within the ED, to identify areas for improvement, and therefore to assist in the development of more effective actions in the future.

METHOD

The scoping review was conducted on several bibliographic databases to identify relevant studies. Two researchers independently screened and reviewed titles, abstracts, and full-text articles that met the inclusion criteria. Using Covidence software, 26 out of 6951 studies were eligible for inclusion in this scoping review based on the PRISMA checklist. Data were extracted, collated, summarized, presented, and discussed.

RESULT

This review identified 26 studies which examined interventions aimed to reduce ED visits, such as the High Alert Program (HAP), the Patient-Centered Medical Home (PCMH), the Primary Behavioral Health Care Integration (PBHCI), and the Collaborative Care (CC) Program, etc. Twenty-three of the studies were conducted in North America, while the rest were conducted in Europe and Australia. A total of 16 studies examined interventions directed to any mental health conditions, while the rest addressed specific health conditions, such as substance use disorders, schizophrenia, anxiety, depression. Interventions involved comprehensive and multidisciplinary services, incorporation of evidence-based behavioral and pharmacological strategies, and emphasized the case management that was found to be effective. Additionally, there was a marked consideration for diverse mental health groups, such as those with substance use disorder and of young age. Most interventions showed a positive effect on reducing psychiatric ED visits.

CONCLUSION

Various initiatives have been implemented worldwide to reduce the number of emergency department visits and the associated burden on healthcare systems. This review highlights the greater need for developing more accessible interventions, as well as setting up a comprehensive community health care system aiming to reduce frequent ED presentations.

Emergency department experiences of people who use drugs who left or were discharged from hospital against medical advice

BACKGROUND

People who use drugs (PWUD) frequent emergency departments at a higher rate than the general population, and experience a greater frequency of soft tissue infections, pneumonia, and chronic conditions such as, HIV/AIDs and hepatitis C. This population has distinct health care considerations (e.g. withdrawal management) and are also more likely to leave or be discharged from hospital against medical advice.

METHODS

This study examines the experiences of PWUD who have left or been discharged from hospital against medical advice to understand the structural vulnerabilities that shape experiences with emergency departments. Semi-structured qualitative interviews were conducted with 30 PWUD who have left or been discharged from hospital against medical advice within the past two years as part of a larger study on hospital care and drug use in Vancouver, Canada.

RESULTS

Findings characterize the experiences and perceptions of PWUD in emergency department settings, and include: (1) stigmatization of PWUD and compounding experiences of discrimination; (2) perceptions of overall neglect; (3) inadequate pain and withdrawal management; and (4) leaving ED against medical advice and a lack of willingness to engage in future care.

CONCLUSIONS

Structural vulnerabilities in ED can negatively impact the care received among PWUD. Findings demonstrate the need to consider how structural factors impact care for PWUD and to leverage existing infrastructure to incorporate harm reduction and a structural competency focused care. Findings also point to the need to consider how withdrawal and pain are managed in emergency department settings.

Trends in Health Service Utilization After Enrollment in an Interdisciplinary Primary Care Clinic for Veterans with Addiction, Social Determinants of Health, or Other Vulnerabilities

BACKGROUND

Models of interdisciplinary primary care (IPC) may improve upon traditional primary care approaches in addressing addiction and social determinants of health.

OBJECTIVE

To compare the trends in health care utilization in the year before and after enrollment in an IPC clinic model, and explore the variations in temporal patterns for patients with histories of high emergency department (ED) use, homelessness, and/or substance use disorders (SUDs).

DESIGN AND PARTICIPANTS

Interrupted time series study of utilization among IPC patients.

MAIN MEASURES

Quarterly ED, inpatient, primary care, and behavioral health visits were abstracted from administrative data before and after IPC enrollment. Negative binomial segmented regressions estimated changes in health care utilization over time. We used interactions to test for statistical differences in temporal patterns for IPC subgroups.

RESULTS

Among IPC patients (n=994), enrollment was associated with overall reductions in ED, inpatient, and behavioral health visits (p's<0.001) and increases in primary care (p's<0.001). Temporal patterns of ED visits, hospitalizations, and behavioral health differed across IPC subgroups (interaction p's<0.001). For those with histories of high ED use (n=265), ED, inpatient, and behavioral health visits decreased after enrollment (level change incidence rate ratios [IRRs]=0.57-0.69) and continued to decline over time (post-enrollment IRRs=0.80-0.88). Among other patients with homeless experiences (n=123), there were initial declines in hospitalizations (IRR=0.33) and overall declines in behavioral health visits (level change and post-enrollment IRRs=0.46-0.94). Other patients with SUDs had initial declines in hospitalizations (IRR=0.46), and post-enrollment declines in rates of specialty SUD visits (IRR=0.92). For all patients, primary care visits initially increased (level change IIRs=2.47-1.34) then gradually declined (post-enrollment IRRs=0.92-0.92).

CONCLUSIONS

An IPC model of care reduces acute care and behavioral health service use, particularly for patients with historically high ED use. IPC models may improve patient and system outcomes of vulnerable patient populations with social, clinical, and addiction morbidities.

Implications for a System of Care in Hawai'i: Primary Care Integration of Substance Use Disorder Treatment

Primary care physicians (PCPs) in Hawai'i face many challenges in treating patients with substance use disorders (SUD) who tend to have higher medical complexity and thus require more resources. PCPs play a vital role in identifying early misuse, integrating and coordinating care for patients with SUD including office-based interventions like medication-assisted treatment, and connecting patients to community treatment programs. In addition to enormous burdens to care for and increasingly complex patient panels, the challenges include lack of education on addiction medicine, insufficient resources and SUD treatment programs in the office and community, low reimbursement for the complexity of care provided, and an overall physician shortage which drives higher patient volume and less time for any given physician. This article suggests responses to address these challenges such as providing more training and continuing education in SUD for PCPs and trainees, enhancing team-based care to better support PCPs, and funding more SUD treatment programs. More funding should widen accessibility to treatment and reduce the overall burden on the health care system by preventing or treating the disease early, which is a core principle of primary care. Additionally, incentives to practice in Hawai'i in primary care, and especially to treat patients with SUD, need to be improved. Such steps must be taken to address the overall physician shortage that limits patients' access to SUD treatment. A collaborative care model between PCPs, care managers, and addiction specialists is an example of an integrated care system that may address many of these challenges in the short term. To truly improve care for all in Hawai'i, however, system wide interventions are essential to increase the incentive for PCPs to remain and practice in Hawai'i to take care of its unique population, including those dealing with SUD.

Prevalence and factors associated with hospitalisation for bacterial skin infections among people who inject drugs: The ETHOS Engage Study

BACKGROUND

Injecting-related skin and soft tissue infections (SSTIs) are a preventable cause of inpatient hospitalisation among people who inject drugs (PWID). This study aimed to determine the prevalence of hospitalisation for SSTIs among PWID, and identify similarities and differences in factors associated with hospitalisation for SSTIs versus non-bacterial harms related to injecting drug use.

METHODS

We performed cross-sectional analyses of baseline data from an observational cohort study of PWID attending drug treatment clinics and needle and syringe programs in Australia. Logistic regression models were used to identify factors associated with self-reported hospitalisation for (1) SSTIs (abscess and/or cellulitis), and (2) non-bacterial harms related to injecting drug use (e.g., non-fatal overdose; hereafter referred to as non-bacterial harms), both together and separately.

RESULTS

1851 participants who injected drugs in the previous six months were enrolled (67% male; 85% injected in the past month; 42% receiving opioid agonist treatment [OAT]). In the previous year, 40% (n = 737) had been hospitalised for drug-related causes: 20% (n = 377) and 29% (n = 528) of participants were admitted to hospital for an SSTI and non-bacterial harm, respectively. Participants who were female (adjusted odds ratio [aOR]: 1.53, 95% CI: 1.19-1.97) or homeless (aOR: 1.59, 95% CI: 1.16-2.19) were more likely to be hospitalised for an SSTI, but not a non-bacterial harm. Both types of hospitalisation were more likely among people recently released from prison.

CONCLUSIONS

Hospitalisation for SSTIs is common among PWID. Community-based interventions to prevent SSTIs and subsequent hospitalisation among PWID will require targeting of at-risk groups, including women, people experiencing homelessness, and incarcerated people upon prison release.

Acceptability of supervised injection facilities among persons who inject drugs in upstate New York

BACKGROUND

Supervised injection facilities (SIFs) provide spaces where persons who inject drugs (PWID) can inject under medical supervision and access harm reduction services. Though SIFs are not currently sanctioned in most of the US, such facilities are being considered for approval in several Upstate New York communities. No data exist from PWID in Upstate New York, and little from outside major US urban centers, on willingness to use SIFs and associated factors.

METHODS

This analysis included 285 PWID (mean age = 38.7; 57.7% male; 72.3% non-Hispanic white) recruited for a study on hepatitis C prevalence among PWID in Upstate New York, where participants were recruited from syringe exchange programs (n = 80) and able to refer other PWID from their injection networks (n = 223). Participants completed an electronic questionnaire that included a brief description of SIFs and assessed willingness to use SIFs. We compared sociodemographic characteristics, drug use/harm reduction history, healthcare experience, and stigma between participants who were willing vs. unwilling to use such programs.

RESULTS

Overall, 67.4% were willing to use SIFs, 18.3% unwilling, and 14.4% unsure. Among those reporting being willing or unwilling, we found higher willingness among those who were currently homeless (91.8% vs. 74.6%; p = 0.004), who had interacted with police in the past 12 months (85.7% vs. 74.5%; p = 0.04), and who were refused service within a healthcare setting (100% vs. 77.1%; p = 0.03).

CONCLUSION

Our results support SIF acceptability in several Upstate New York PWID communities, particularly among those reporting feelings of marginalization. A large proportion reported being unsure about usage of SIFs, suggesting room for educating PWID on the potential benefits of this service. Our results support SIF acceptability in Upstate New York and may inform programming for underserved PWID, should SIFs become available.

Characterizing people with frequent emergency department visits and substance use: a retrospective cohort study of linked administrative data in Ontario, Alberta, and B.C., Canada

Background

Substance use is common among people who visit emergency departments (EDs) frequently. We aimed to characterize subgroups within this cohort to better understand care needs/gaps, and generalizability of characteristics in three Canadian provinces.

Methods

This was a retrospective cohort study (April 1^st, 2013 to March 31^st, 2016) of ED patients in Ontario, Alberta, and British Columbia (B.C.) We included patients ≥ 18 years with substance use-related healthcare contact during the study period and frequent ED visits, defined as those in the top 10% of ED utilization when all patients were ordered by annual ED visit number. We used linked administrative databases including ED visits and hospitalizations (all provinces); mental heath-related hospitalizations (Ontario and Alberta); and prescriptions, physician services, and mortality (B.C.). We compared to cohorts of people with (1) frequent ED visits and no substance use, and (2) non-frequent ED visits and substance use.

We employed cluster analysis to identify subgroups with distinct visit patterns and clinical characteristics during index year, April 1^st, 2014 to March 31^st, 2015.

Results

In 2014/15, we identified 19,604, 7,706, and 9,404 people with frequent ED visits and substance use in Ontario, Alberta, and B.C (median 37–43 years; 60.9–63.0% male), whose ED visits and hospitalizations were higher than comparison groups.

In all provinces, cluster analyses identified subgroups with “extreme” and “moderate” frequent visits (median 13–19 versus 4–6 visits/year). “Extreme” versus “moderate” subgroups had more hospitalizations, mental health-related ED visits, general practitioner visits but less continuity with one provider, more commonly left against medical advice, and had higher 365-day mortality in B.C. (9.3% versus 6.6%; versus 10.4% among people with frequent ED visits and no substance use, and 4.3% among people with non-frequent ED visits and substance use). The most common ED diagnosis was acute alcohol intoxication in all subgroups.

Conclusions

Subgroups of people with “extreme” (13–19 visits/year) and “moderate” (4–6 visits/year) frequent ED visits and substance use had similar utilization patterns and characteristics in Ontario, Alberta, and B.C., and the “extreme” subgroup had high mortality. Our findings suggest a need for improved evidence-based substance use disorder management, and strengthened continuity with primary and mental healthcare.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12873-022-00673-x.

"The Drug Use Unfortunately isn't all Bad": Chronic Disease Self-Management Complexity and Strategy Among Marginalized People Who Use Drugs

Self-management programs improve health outcomes and self-management is recommended for chronic conditions. Yet chronic disease self-management supports have rarely been applied to people who use drugs (PWUD). Thus, our objective was to explore self-management experiences among marginalized PWUD. We used community-based participatory methods and conducted qualitative interviews. Participants self-identified as having long-term and past year experience using non-prescribed drugs, one other chronic condition, and socioeconomic marginalization. We analyzed the data using reflexive thematic analysis. Although many participants considered drug use a chronic health issue, self-medicating with non-prescribed drugs was also a key self-management strategy to address other health issues. Participants also described numerous other strategies, including cognitive and behavioral tactics. These findings highlight the need for a safe supply of pharmaceutical-grade drugs to support self-management among marginalized PWUD. Self-management supports should also be tailored to address relevant topics (e.g., harm reduction, withdrawal), include creative activities, and not hinder PWUD's agency.

Infectious diseases, comorbidities and outcomes in hospitalized people who inject drugs (PWID)

Injection drug use poses a public health challenge. Clinical experience indicates that people who inject drugs (PWID) are hospitalized frequently for infectious diseases, but little is known about outcomes when admitted. Charts were identified from local hospitals between 2013-2018 using consultation lists and hospital record searches. Included individuals injected drugs in the past six months and presented with infection. Charts were accessed using the hospital information system, undergoing primary and secondary reviews using Research Electronic Data Capture (REDCap). The Wilcoxon rank-sum test was used for comparisons between outcome categories. Categorical data were summarized as count and frequency, and compared using Fisher's exact test. Of 240 individuals, 33% were admitted to the intensive care unit, 36% underwent surgery, 12% left against medical advice (AMA), and 9% died. Infectious diagnoses included bacteremia (31%), abscess (29%), endocarditis (29%), cellulitis (20%), sepsis (10%), osteomyelitis (9%), septic arthritis (8%), pneumonia (7%), discitis (2%), meningitis/encephalitis (2%), or other (7%). Sixty-six percent had stable housing and 60% had a family physician. Fifty-four percent of patient-initiated discharges were seen in the emergency department within 30 days and 29% were readmitted. PWID are at risk for infections. Understanding their healthcare trajectory is essential to improve their care.

Characterizing safer supply prescribing of immediate release hydromorphone for individuals with opioid use disorder across Ontario, Canada

BACKGROUND

In response to the ongoing overdose crisis, some clinicians in Canada have started prescribing immediate release hydromorphone (IRH) as an alternative to the toxic unregulated drug supply. This practice is often referred to as safer supply. We aimed to identify and characterize patients receiving safer supply IRH and their prescribers in Ontario.

METHODS

Using provincial administrative health data, we identified individuals with opioid use disorder prescribed safer supply IRH from January 2016 to March 2020 and reported the number of initiations over time. We summarized demographic, health, and medication use characteristics among patients who received safer supply IRH, and examined select clinical outcomes including retention and death. Finally, we characterized prescribers of safer supply IRH and compared frequent and infrequent prescribers.

RESULTS

We identified 534 initiations of safer supply IRH (447 distinct individuals) from 155 prescribers. Initiations increased over time with a peak in the third quarter of 2019 (103 initiations). Patients' median age was 42 (interquartile range [IQR] 34-50), and most were male (60.2%), urban residents, (96.2%), and in the lowest neighborhood income quintile (55.7%), with 13.9% having overdosed in the previous one year. The prevalence of HIV was 13.9%. The median duration on IRH was 272 days (IQR 30-1,244) and OAT was co-prescribed in 62.9% of courses. Death while receiving IRH or within 7 days of discontinuation was rare (≤5 courses;≤0.94 per person-year for each).

CONCLUSIONS

Clinicians are increasingly prescribing safer supply IRH in Ontario. Patients prescribed safer supply IRH had demographic and clinical characteristics associated with high risk of death from opioid-related overdose. Short-term deaths among people receiving safer supply IRH were rare.

Emergency department use for mental and substance use disorders: descriptive analysis of population-based, linked administrative data in British Columbia, Canada

OBJECTIVES

Information on emergency department (ED) visits for mental and substance use disorders (MSUDs) is important for planning services but has not been explored in British Columbia (BC), Canada. We describe all MSUD ED visits for people ages 15 and older in the province of BC in 2017/2018 and document trends in MSUD ED visits between 2007/2008 and 2017/2018 by disorder group.

DESIGN

Population-based linked administrative data comprised of ED records and physician billings capturing all MSUD ED visits in BC.

SETTING

BC is Canada's westernmost province with a population of approximately 5 million. Permanent residents receive first-dollar coverage for all medically necessary services provided by licensed physicians or in hospitals, including ED services.

POPULATION

All people age >15 with MSUD ED visits during the study period.

MEASURES

All claims with a service location in the ED or corresponding to fee items billed only in the ED were examined alongside ED visits reported through a national reporting system. Patient characteristics (sex/gender, age, location of residence, income, treated disorders and comorbidities) and previous outpatient service use for all ED visits by visit diagnosis are also described.

RESULTS

A total of 72 363 people made 134 063 visits to the ED in 2017/2018 for needs related to MSUD. MSUD ED visits have increased since 2010, particularly visits for substance use and anxiety disorders. People with more frequent visits were more likely to be male, on public prescription drug plans for income assistance, prescribed psychiatric medications, and living in lower-income neighbourhoods. They used more community-based primary care and psychiatry services and had lower continuity of primary care.

CONCLUSIONS

MSUD ED visits are substantial and growing in BC. Findings underscore a need to strengthen and target community healthcare services and adequately resource and support EDs to manage growing patient populations.

Social determinants of health and depression in adults presenting to the emergency department: Implications for family medicine

OBJECTIVE

To estimate the extent to which social determinants of health (SDH) predict levels of depression in adults presenting to the emergency department (ED) with an acute mental health crisis.

DESIGN

Secondary data analysis.

SETTING

St Paul's Hospital, an urban tertiary care hospital in Vancouver, BC.

PARTICIPANTS

Patients 19 years and older presenting to the ED with an acute mental health crisis.

MAIN OUTCOME MEASURES

Responses to demographic questionnaires focused on SDH and to measures of self-perceived health and depression. Relationships between depression and SDH were described using t tests and χ ² tests. The extent to which SDH variables predicted depression scores, as measured by the Patient Health Questionnaire-9 (PHQ-9), was determined using linear regression.

RESULTS

The primary study had 202 participants. Data for the 156 (77%) participants who completed the PHQ-9 were assessed in this secondary analysis. In this sample, 60% of participants identified as men, 37% as women, and 4% as other. The mean (SD) age was 39.1 (13.8) years, with most participants identifying as white (65%) or Indigenous (18%). Thirty-seven percent had a high school diploma or less education, and 72% reported being unemployed. Identifying as a woman, lack of access to clean drinking water, poor food security, feeling unsafe, little structured use of time, lack of a sense of community, and dissatisfaction with housing significantly predicted higher depression scores. Overall, 59% of respondents met the criteria for moderately severe or severe depression (PHQ-9 score ≥ 15), with 37% of those reporting thoughts of suicide nearly every day for the past 2 weeks.

CONCLUSION

This study demonstrates the importance of screening for both depression and SDH in the ED. Because the ED often does not have the capacity to address appropriate levels of follow-up for this population, this study has important implications for primary care. Developing a clear pathway of follow-up support for people with depression and SDH risk factors will be critical to optimize patient outcomes, promote patient safety, enhance patient satisfaction, and optimize the use of resources between the ED and primary care.

Acute health care among Indigenous patients in Canada: a scoping review

A recent report by the Chief Public Health Officer of Canada demonstrates the inferior health status of Indigenous Peoples in Canada when compared to non-Indigenous populations. This scoping review maps out the available literature concerning acute health care for Indigenous Peoples in Canada in order to better understand the health care issues they face. All existing articles concerning health care provided to Indigenous Peoples in Canada in acute settings were included in this review. The targeted studied outcomes were access to care, health care satisfaction, hospital visit rates, mortality, quality of care, length of stay and cost per hospitalisation. 114 articles were identified. The most studied outcomes were hospitalisation rates (58.8%), length of stay (28.0%), mortality (25.4%) and quality of care (24.6%) Frequently studied topics included pulmonary disease, injuries, cardiovascular disease and mental illness. Indigenous Peoples presented lower levels of satisfaction and access to care although they tend to be over-represented in hospitalisation rates for acute care. Greater inclusion of Indigenous Peoples in the health care system and in the training of health care providers is necessary to ensure a better quality of care that is culturally safe for Indigenous Peoples.

Recreational Drug Use in People Living with HIV in Spain: Factors Associated with Drug Use and the Impact on Clinical Outcomes

We analysed the impact of recreational drug use (RDU) on different outcomes in people living with HIV (PLHIV). A multicentre retrospective cohort study was performed with two cohorts of PLHIV included: people using recreational drugs (PURD) vs. people not using recreational drugs (PNURD). Overall, 275 PLHIV were included. RDU was associated with men having sex with men (OR 4.14, 95% CI [1.14, 5.19]), previous sexually transmitted infections (OR 4.00, 95% CI [1.97, 8.13]), and current smoking (OR 2.74, 95% CI [1.44, 5.19]). While the CD₄/CD₈ ratio increased amongst PNURD during the follow-up year, it decreased amongst PURD (p = 0.050). PURD presented lower scores of self-reported and multi-interval antiretroviral adherence (p = 0.017, and p = 0.006, respectively), emotional well-being (p < 0.0001), and regular follow-up (p = 0.059), but paid more visits to the emergency unit (p = 0.046). RDU worsens clinical, immunological, and mental health outcomes amongst PLHIV.

Injection Drug Use and Healthcare Utilization in Patients Newly Diagnosed With HIV

OBJECTIVES

To determine recent trends in: (1) human immunodeficiency virus (HIV) diagnoses, (2) the proportion of patients newly diagnosed with HIV with injection drug use (IDU) and (3) patients' patterns of healthcare utilization in the year before diagnosis at an urban, academic medical center.

METHODS

We performed a cross sectional study of patients newly diagnosed with HIV at a healthcare system in southern New Jersey between January 1st, 2014 and December 31st, 2019. Patients 18 years or older with HIV diagnosed during the study period were included. Demographics, comorbidities, HIV test results, and healthcare utilization data were collected from the electronic medical record.

RESULTS

Of 192 patients newly diagnosed with HIV, 36 (19%) had documented IDU. New HIV diagnoses doubled from 22 to 47 annual cases between 2014 and 2019. The proportion of patients with newly diagnosed HIV and documented IDU increased from 9% in 2014 to 32% in 2019, chi-square test for linear trend P value = 0.001. Eighty-nine percent of patients with IDU had at least one contact with the healthcare system in the year before diagnosis compared to 63% of patients without IDU, P value 0.003. The median (interquartile range IQR) number of healthcare visits was 7 [2-16] for patients with IDU versus 1 [0-3] for patients without IDU, P < 0.001.

CONCLUSIONS

We observed an increase in new HIV diagnoses with an increase in the proportion of newly diagnosed patients with IDU. Patients with newly diagnosed HIV and IDU had high rates of health care utilization in the year before diagnosis presenting an opportunity for intervention.

A cross-sectional study of factors associated with unstable housing among marginalized people who use drugs in Ottawa, Canada

Introduction

Housing affects an individual’s physical and mental health, particularly among people who use substances. Understanding the association between individual characteristics and housing status can inform housing policy and help optimize the care of people who use drugs. The objective of this study was to explore the factors associated with unstable housing among people who use drugs in Ottawa.

Methods

This is a cross-sectional analysis of data from 782 participants in the Participatory Research in Ottawa: Understanding Drugs (PROUD) Study. PROUD is a prospective cohort study of people who use drugs in Ottawa. Between March and December 2013, participants were recruited through peer-based recruitment on the streets and in social services settings and completed a peer-administered questionnaire that explored socio-demographic information, drug use patterns, community integration, experiences with police and incarceration, and access to health care and harm reduction services. Eligibility criteria included age of 16 years or older, self-reported illicit drug use within the past 12 months and having lived in Ottawa for at least 3 months. Housing status was determined by self-report. “Stable housing” was defined as residence in a house or apartment and “unstable housing” was defined as all other residence types. Exploratory multivariable logistic regression analyses of the association between characteristics of people who use drugs and their housing status were conducted.

Results

Factors that were associated with unstable housing included: recent incarceration; not having a regular doctor; not having received support from a peer worker; low monthly income; income source other than public disability support payments; and younger age. Gender, language, ethnicity, education level, opioid use and injection drug use were not independently associated with housing status.

Conclusions

People who use drugs face significant barriers to stable housing. These results highlight key areas to address in order to improve housing stability among this community.

Hospital policy as a harm reduction intervention for people who use drugs

Hospitals are a critical touchpoint for people who use drugs (PWUD). However, hospital policies, both formal and informal, can have a detrimental impact on PWUD in acute care settings. Introducing new policies, or revising existing policies that inadvertently harm or stigmatize PWUD while hospitalized, could be an effective harm reduction intervention for this high-risk population. This paper explores seven areas where institutional policy change could improve the hospital experience of PWUD: (1) use of nonprescribed substances in hospital, (2) supporting inpatient addiction consultation services (3) in-hospital supervised consumption spaces (4) supply and distribution of safe drug use equipment and naloxone, (5) role of security services and personal searches, (6) use of hospital restrictions, and (7) involvement of PWUD in policy development.

Augmentation in Healthcare Utilization of Patients with Opioid Use Disorder After Methadone Maintenance Treatment: A Retrospective Nationwide Study

INTRODUCTION

The health benefits of entering methadone maintenance treatment (MMT) for opioid-dependent persons may not be merely limited to therapy of opioid use disorder. We aimed to compare the healthcare utilization of MMT patients before and after MMT.

METHODS

A retrospective analysis was performed using the Taiwan Illicit Drug Issue Database and the National Health Insurance Research Database (NHIRD) between 2014 and 2016. We included 1255 newly enrolled MMT patients in 2015 and randomly selected 5020 patients from NHIRD matched by age and gender as the comparison group. Changes in healthcare utilization 1 year before and 1 year after the date of the index date (MMT initiation) were compared within and between MMT and comparison groups.

RESULTS

During the 1-year period following MMT, the hospitalization length was considerably decreased, while the number of outpatient visits, emergency department (ED) visits, and ED expenditure significantly increased in MMT patients. Multivariable linear regression with the difference-in-difference approach revealed that all the categories of healthcare utilization increased, except for a minor increase of outpatient expenditure and a slight decrease of hospitalization length for the MMT group relative to the comparison group. Increases in utilization of the departments of psychiatry and infectious diseases of the MMT patients were considerable.

CONCLUSION

MMT is associated with increased healthcare utilization, and departments of psychiatry and infectious diseases play substantial roles. Policy-makers should warrant access for all who need healthcare by ensuring the availability of the treatment for drug dependence.

Hospital admissions and mortality due to complications of injection drug use in two hospitals in Regina, Canada: retrospective chart review

BACKGROUND

Infectious complications of injection drug use (IDU) often require lengthy inpatient treatment. Our objective was to identify the number of admissions related to IDU in Regina, Canada, as well as describe patient demographics and comorbidities, yearly mortality, readmission rate, and cumulative cost of these hospitalizations between January 1 and December 31, 2018. Additionally, we sought to identify factors that increased risk of death or readmission.

METHODS

This study is a retrospective chart review conducted at the two hospitals in Regina. Eligible study cases were identified by querying the discharge database for predetermined International Classification of Diseases code combinations. Electronic medical records were reviewed to assess whether each admission met inclusion criteria, and hospitalization and patient data were subsequently extracted for all included admissions. Mortality data were gleaned from hospital and Ministry of Health databases. Data were analyzed using Excel and IBM SPSS Statistics to identify common comorbidities, admission diagnoses, and costs, as well as to compare patients with a single admission during the study period to those with multiple admissions. Logistic regression analysis was used to identify the relationship between individual variables and in- and out-of-hospital annual mortality.

RESULTS

One hundred and forty-nine admissions were included, with 102 unique patients identified. Common comorbidities included hepatitis C (47%), human immunodeficiency virus (HIV) (25%), and comorbid psychiatric disorders (19%). In 23% of all admissions, patients left hospital prior to treatment completion, and 27% of patients experienced multiple admissions. Female patients and those with chronic pain were more likely to be readmitted (p = 0.024 and p = 0.029, respectively). Patients admitted with infective endocarditis were more likely to die during hospitalization (p = 0.0001). The overall mortality was 15% in our cohort. The estimated cumulative cost of inpatient treatment of complications of IDU in Regina was $3.7 million CAD in 2018.

CONCLUSION

Patients with history of IDU and hospital admission experience high mortality rates in Regina, a city with paucity of inpatient supports for persons who use injection drugs. Needle syringe programs, opioid agonist therapy, and safe consumption sites have been shown to improve outcomes as well as reduce healthcare costs for this patient population. We will use our findings to advocate for increased access to these harm reduction strategies in Regina, particularly for inpatients.

Understanding the impact of a residential housing programme for people living with HIV/AIDS: a realist evaluation protocol

INTRODUCTION

Housing instability and homelessness are significant barriers to medical treatment for people living with HIV/AIDS. For these individuals, lack of stable housing and stigma is associated with insufficient access to care, poor adherence to medication and higher cost burdens to the healthcare system. This protocol reports on the efforts to evaluate Sanctum V.1.0, a hospice and transitional care home for adults with HIV/AIDS in Saskatoon, Saskatchewan, Canada. The current project was developed out of a need to identify how Sanctum V.1.0 produces varying programme outcomes to assist in endeavours to replicate the programme in other geographic locations.

METHODS AND ANALYSIS

A realist evaluation will be conducted to explore how and why Sanctum V.1.0 is successful or unsuccessful, in which circumstances and for whom. Rather than explore the degree to which a programme is effective, realist evaluations seek to uncover mechanisms that explain processual links between programme inputs and outcomes. The completed first phase of the project involved the development of an initial realist programme theory. Phases 2 and 3 will consist of methods to test, refine and validate the initial theory using various data sources.

ETHICS AND DISSEMINATION

Ethics approval was obtained from the institutional review board at the University of Saskatchewan on 2 July 2020. Results will be disseminated according to stakeholders' desires.

Pre-exposure Prophylaxis (PrEP) Awareness and Prescribing Behaviors Among Primary Care Providers: DocStyles Survey, 2016-2020, United States

Few studies have assessed providers' intent of prescribing PrEP in the future. We analyzed cross-sectional web-based surveys to estimate trends from 2016 to 2020 in PrEP awareness and prescribing behaviors in the United States among primary care providers. Multivariable logistic regression was used to estimate prevalence of PrEP awareness, prescribing behaviors, and likelihood of prescribing PrEP in the next 12 months. The adjusted prevalence for PrEP awareness was significantly higher in 2019 (93.7%, 95% CI 91.9%, 95.2%) compared to 2018 (88.1%, 95% CI 85.5%, 90.3%). The adjusted prevalence for prescribing PrEP was significantly higher in 2019 (16.4%, 95% CI 13.6%, 19.6%) and 2020 (15.6%, 95% CI 13.0%, 18.7%) compared to 2018 (12.2%, 95% CI 10.0%, 14.7%). Practicing in the West and regularly screening for HIV were associated with higher PrEP awareness and provision. Studies should examine factors associated with PrEP provision for groups with increased risk for HIV.

Peer support workers as a bridge: a qualitative study exploring the role of peer support workers in the care of people who use drugs during and after hospitalization

BACKGROUND

To describe the key qualities and unique roles of peer support workers in the care of people who inject drugs during and after hospitalization.

METHODS

We conducted a qualitative study. Key stakeholders were recruited including: people who use drugs who had been hospitalized, healthcare team members, peer support workers, and employers of peer support workers. Data were collected from 2019 to 2020 using semi-structured interviews that were audio-recorded, transcribed, and analyzed thematically.

RESULTS

Fourteen participants were interviewed: 6 people who use drugs who had been hospitalized, 5 healthcare team members, 2 peer support workers, and 1 employer of peer support workers. At the core of the data was the notion of peer workers acting as a bridge. We found four themes that related to functions of this bridge: overcoming system barriers, advocacy, navigating transitions within the healthcare system, and restoring trust between HCPs and PWUD. We found two themes for building a strong bridge and making the role of a peer support worker function effectively (training and mentorship, and establishing boundaries). We found three themes involving characteristics of an effective peer worker (intrinsic qualities, contributions of shared experiences, and personal stability).

CONCLUSION

Peer support workers are highly valued by both people who use drugs and members of the healthcare team. Peer support workers act as a bridge between patients and healthcare providers and are critical in establishing trust, easing transitions in care, and providing unique supports to people who use drugs during and after hospitalization.

Retention of opioid agonist treatment prescribers across New South Wales, Australia, 2001-2018: Implications for treatment systems and potential impact on client outcomes

BACKGROUND

There has been much research on the efficacy and effectiveness of opioid agonist treatment (OAT), but less on its implementation and sustainability. A challenge internationally has been recruiting and retaining prescribers. This paper aims to characterise the prescribers in terms of OAT prescribing behaviours.

METHODS

Retrospective cohort study in New South Wales, Australia. Participants were 2199 OAT prescribers between 1 st August 2001-19th September 2018.We examined trends in initiation and cessation of OAT prescribers. Adjusted hazard ratios were calculated to estimate prescriber retention, adjusting for year of initiation, practice type, client load and treatment prescribed.

RESULTS

The rate of prescribers ceasing OAT prescribing has been increasing over time: a prescriber who initiated between 2016-2017 had over four times the risk of cessation compared with one who initiated before 2001, AHR: 4.77; [3.67-6.21]. The highest prescriber cessation rate was in prescribers who had prescribed for shorter time periods. The annual percentage of prescribers who ceased prescribing among those who prescribed for ≤5 years increased from 3% in 2001 to 20 % in 2017. By 2017 more prescribers were discontinuing prescribing than new prescribers were starting. Approximately 87 % (n = 25,167) of OAT clients were under the care of 20 % of OAT prescribers (n = 202); half had been prescribing OAT for 17+ years.

CONCLUSIONS

OAT prescribing is increasingly concentrated in a small group of mature prescribers, and new prescribers are not being retained. There is a need to identify and respond to the reasons that contribute to newer prescribers to cease prescribing and put in place strategies to increase retention and broaden the base of doctors involved in such prescribing.

Suicide attempts and death among heroin-involved women seeking methadone treatment in Taiwan

BACKGROUND

The present study aims to profile the hazard fluctuation of suicide attempts and deaths among heroin-involved women seeking methadone maintenance treatment (MMT) and to investigate sociodemographic and clinical factors predicting the time to have suicidal behaviors.

METHODS

We identified a retrospective cohort comprising 2780 women receiving methadone treatment in the period of 2012-2016. Healthcare records were obtained from Taiwan's National Health Insurance Research Database, and suicide deaths were ascertained from the national death register. Competing risk survival analyses were used to estimate the risk of suicide attempts and deaths within one year and three years of MMT enrollment.

RESULTS

A total of 1.2 % of MMT-treated women ever visited hospital for suicide attempt, and 0.5 % died by confirmed suicide. The risk of treated suicide attempt reached its peak at the end of the 8th month after methadone initiation, whereas the risk of confirmed suicide death was relatively stable during the first one and a half years. A history of treated depressive disorders appears to be the strongest risk predictor for treated suicide attempts (Adjusted Hazard Ratio [aHR] = 3.45; 95 % CI = 1.66-7.19) and confirmed suicide death (aHR = 3.47; 95 % CI = 1.20-10.0). Retaining in methadone treatment may significantly lower the hazard of probable suicide death by 52 %.

CONCLUSIONS

Women with heroin use disorders should receive careful attention for suicide risk at intake assessment and over the course of treatment and recovery. Preventive strategies should target unmet clinical and social needs and evaluate gender-specific barriers for treatment engagement.

Impact of comprehensive care on health care use among a cohort of marginalized people living with hepatitis C in Toronto

Background

The majority of new hepatitis C (HCV) cases occur among people who inject drugs. In recent years, multidisciplinary models of HCV treatment have emerged that demonstrate successful treatment outcomes for this population, as well as broad positive individual- and system-level impacts. Our objective was to evaluate changes in health care use among a cohort of people living with HCV before and after engagement with one such program.

Methods

Program data were uniquely linked to provincial health administrative databases. Rates of emergency department (ED) visits and hospital admissions of clients from 2011 through 2015 (N = 103) were evaluated using linkages with administrative data for the 2 years before and after program initiation. Data were evaluated using negative binomial regression models with a covariance structure to account for within-individual correlations. Results: Of participants, 72.8% were men (mean age 47 years), and 38% experienced high rates of physical and mental health comorbidity (Aggregated Diagnosis Group score ≥10). Female clients had significantly fewer ED visits 2 years after program initiation (5.04 versus 3.12; risk ratio [RR] 0.61 [95% CI 0.44% to 0.86%]). ED visits for infectious diseases and soft tissue injury were significantly lower for the cohort overall (RRs 0.58 0.51 [95% CIs 0.35% to 0.95% and 0.29% to 0.90%], respectively).

Conclusion

Co-locating HCV treatment within comprehensive primary care and harm reduction services appears to have benefits beyond HCV, including a reduction in ED visits among women and a decrease in ED visits for soft tissue infections for all participants.

Frequency of health-care utilization by adults who use illicit drugs: a systematic review and meta-analysis

AIMS

To summarize evidence on the frequency and predictors of health-care utilization among people who use illicit drugs.

DESIGN

Systematic search of MEDLINE, EMBASE and PsychINFO for observational studies reporting health-care utilization published between 1 January 2000 and 3 December 2018. We conducted narrative synthesis and meta-analysis following a registered protocol (identifier: CRD42017076525).

SETTING AND PARTICIPANTS

People who use heroin, powder cocaine, crack cocaine, methamphetamine, amphetamine, ecstasy/3,4-methyl​enedioxy​methamphetamine (MDMA), cannabis, hallucinogens or novel psychoactive substances; have a diagnosis of 'substance use disorder'; or use drug treatment services.

MEASUREMENTS

Primary outcomes were the cumulative incidence (risk) and rate of care episodes in three settings: primary care, hospital admissions (in-patient) and emergency department (ED).

FINDINGS

Ninety-two studies were included, 84% from North America and Australia. Most studies focused on people using heroin, methamphetamine or crack cocaine, or who had a diagnosis of drug dependence. We were able to conduct a meta-analysis of rates across 25 studies reporting ED episodes and 25 reporting hospital admissions, finding pooled rates of 151 [95% confidence interval (CI) = 114-201] and 41 (95% CI = 30-57) per 100 person-years, respectively; on average 4.8 and 7.1 times more often than the general population. Heterogeneity was very high and was not explained by drugs used, country of study, recruitment setting or demographic characteristics. Predictors of health-care utilization were consistent across studies and included unstable housing, drug injection and mental health problems. Opioid substitution therapy was consistently associated with reduced ED presentation and hospital admission. There was minimal research on health-care utilization by people using ecstasy/MDMA, powder cocaine, hallucinogens or novel psychoactive substances.

CONCLUSIONS

People who use illicit drugs are admitted to emergency department or hospital several times more often than the general population.

Clinical ultrasonography in patients who inject drugs (the CUPID protocol): an illustrated case series

In 2017, there were ≈47,600 opioid overdose-related deaths in the United States. US emergency department (ED) visits for suspected opioid overdose increased by 30% between July 2016 and September 2017.2 The current US opioid epidemic makes it critical for emergency physicians to be aware of common and uncommon infectious and non-infectious complications of injection drug use. Point-of-care ultrasound has become a widely available, non-invasive diagnostic tool in EDs across the United States and worldwide. The increasing population of injection drug use patients is at risk for serious morbidity and mortality from an array of disease states amenable to ultrasound-based diagnosis. We propose a protocol for clinical ultrasonography in patients who inject drugs (the CUPID protocol), a focused, 3-system point-of-care ultrasound approach emphasizing cardiovascular, thoracic, and musculoskeletal imaging. The protocol is a screening tool, designed to detect high risk infectious and noninfectious complications of injection drug use.

Characteristics of older adults living with HIV accessing home and community care services in British Columbia, Canada

Over half of people living with HIV (PLHIV) engaged in care in British Columbia (BC) are age ≥50. The public home and community care (HCC) system offers formal support that PLHIV may turn to as they age, but little is known about access specific to PLHIV. Using data from the STOP HIV/AIDS cohort, which includes linked treatment and demographic records for PLHIV accessing care in BC, we compared older PLHIV (defined as those age ≥50) who did and did not access HCC services. We estimated adjusted odds ratios (aORs) for factors associated with HCC service utilization using logistic regression. This study included 5,603 PLHIV age ≥50, 837 (14.94%) of whom accessed any HCC service between 2005 and 2015. Services most commonly used were community nursing (8.98%, n = 503) and rehabilitation (7.73%, n = 433). Those who received HCC were more likely to be female (aOR = 1.56, 95% CI = 1.24, 1.98), have a history of injection drug use (aOR = 1.88, 95% CI = 1.57, 2.25), have a higher Charlson comorbidity score (aOR = 1.11, 95% CI:1.07, 1.15) and to have visited a general practitioner in the past year (aOR = 2.17, 95% CI = 1.77, 2.67). Approximately 15% of older PLHIV have accessed HCC, but the extent of potential unmet need for these services requires further research.

Development of the Inner City attitudinal assessment tool (ICAAT) for learners across Health care professions

BACKGROUND

Many health professions learners report feeling uncomfortable and underprepared for professional interactions with inner city populations. These learners may hold preconceptions which affect therapeutic relationships and provision of care. Few tools exist to measure learner attitudes towards these populations. This article describes the development and validity evidence behind a new tool measuring health professions learner attitudes toward inner city populations.

METHODS

Tool development consisted of four phases: 1) Item identification and generation informed by a scoping review of the literature; 2) Item refinement involving a two stage modified Delphi process with a national multidisciplinary team (n = 8), followed by evaluation of readability and response process validity with a focus group of medical and nursing students (n = 13); 3) Pilot testing with a cohort of medical and nursing students; and 4) Analysis of psychometric properties through factor analysis and reliability.

RESULTS

A 36-item online version of the Inner City Attitudinal Assessment Tool (ICAAT) was completed by 214 of 1452 undergraduate students (67.7% from medicine; 32.3% from nursing; response rate 15%). The resulting tool consists of 24 items within a three-factor model - affective, behavioural, and cognitive. Reliability (internal consistency) values using Cronbach alpha were 0.87, 0.82, and 0.82 respectively. The reliability of the whole 24-item ICAAT was 0.90.

CONCLUSIONS

The Inner City Attitudinal Assessment Tool (ICAAT) is a novel tool with evidence to support its use in assessing health care learners' attitudes towards caring for inner city populations. This tool has potential to help guide curricula in inner city health.

Identification of emergency department patients for referral to rapid-access addiction services

OBJECTIVES

Substance-related emergency department (ED) visits are rapidly increasing. Despite this finding, many EDs do not have access to on-site addiction services. This study characterized substance-related ED presentations and assessed the ED health care team's perceived need for an on-site rapid-access addiction clinic for direct patient referral from the ED.

METHODS

This prospectively enrolled cohort study was conducted at an urban tertiary care ED from June to August 2018. Adult ED patients with problematic or high-risk substance use were enrolled by ED staff using a one-page form. The electronic and paper records from the index ED visit were reviewed. The primary outcome evaluated whether the ED health care team would have referred the patient to an on-site rapid-access addiction clinic, if one were available.

RESULTS

We received 557 enrolment forms and 458 were included in the analysis. Median age was 35 years, and 64% of included patients were male. Alcohol was the most commonly reported substance of problematic or high-risk use (60%). Previous ED visits within 7 days of the index visit were made by 28% of patients. The ED health care team indicated "Yes" for rapid-access addiction clinic referral from the ED for 66% of patients, with a mean of 4.3 patients referred per day during the study period.

CONCLUSIONS

At least four patients per day would have been referred to an on-site rapid-access addiction clinic from the ED, had one been available. This indicates a gap in care and collaborating with other sites that have successfully implemented this clinic model is an important next step.

Opioid, cocaine, and amphetamine use disorders are associated with higher30-day inpatient readmission rates in the United States

Background: Patients with substance use disorders (SUDs) are more likely to experience serious health problems, high healthcare utilization, and premature death. However, little is known about the contribution of SUDs to medical 30-day readmission risk. We examined the association between SUDs and 30-day all cause readmission among non-pregnant adult in-patients in the US. Methods: We conducted a retrospective study using 2010-2014 data from the Nationwide Readmissions Database. Our primary focus was on opioid use compared to stimulant use (cocaine and amphetamine) identified by ICD-9-CM diagnosis codes in index hospitalizations. Multivariable logistic regression models were used to estimate adjusted odds ratios and 95% CI representing the association between substance use and 30-day readmission, overall and stratified by the principal reason for the index hospitalization. Results: Nearly 118 million index hospitalizations were included in the study, 4% were associated with opioid or stimulant use disorder. Readmission rates for users (19.5%) were higher than for nonusers (15.7%), with slight variation by the type of substance used: cocaine (21.8%), opioid (19.0%), and amphetamine (17.5%). After adjusting for key demographic, socioeconomic, clinical, and health system characteristics, SUDs and stimulant use disorders increased the odds of 30-day all-cause readmission by 20%. Conclusions: Reducing the frequency of inpatient readmission is an important goal for improving the quality of care and ensuring proper transition to residential/outpatient care among patients with SUDs. Differences between groups may suggest directions for further investigation into the distinct needs and challenges of hospitalized opioid- and other drug-exposed patients.

Effect of Integrating Substance Use Disorder Treatment into Primary Care on Inpatient and Emergency Department Utilization

BACKGROUND

Components of substance use disorder (SUD) treatment have been shown to reduce inpatient and emergency department (ED) utilization. However, integrated treatment using pharmacotherapy and recovery coaches in primary care has not been studied.

OBJECTIVE

To determine whether integrated addiction treatment in primary care reduces inpatient and ED utilization and improves outpatient engagement.

DESIGN

A retrospective cohort study comparing patients in practices with and without integrated addiction treatment including pharmacotherapy and recovery coaching during a staggered roll-out period.

PARTICIPANTS

A propensity score matched sample of 2706 adult primary care patients (1353 matched pairs from intervention and control practices) with a SUD diagnosis code, excluding cannabis or tobacco only, matched on baseline utilization.

INTERVENTION

A multi-modal strategy that included forming interdisciplinary teams of local champions, access to addiction pharmacotherapy, counseling, and recovery coaching. Control practices could refer patients to an addiction treatment clinic offering pharmacotherapy and behavioral interventions.

MAIN MEASURES

The number of inpatient admissions, hospital bed days, ED visits, and primary care visits.

KEY RESULTS

During the follow-up period, there were fewer inpatient days among the intervention group (997 vs. 1096 days with a mean difference of 7.3 days per 100 patients, p = 0.03). The mean number of ED visits was lower for the intervention group (36.2 visits vs. 42.9 per 100 patients, p = 0.005). There was no difference in the mean number of hospitalizations. The mean number of primary care visits was higher for the intervention group (317 visits vs. 270 visits per 100 patients, p < 0.001). Intervention practices had a greater increase in buprenorphine and naltrexone prescribing.

CONCLUSIONS

In a non-randomized retrospective cohort study, integrated addiction pharmacotherapy and recovery coaching in primary care resulted in fewer hospital days and ED visits for patients with SUD compared to similarly matched patients receiving care in practices without these services.

Association of Methadone Treatment With Substance-Related Hospital Admissions Among a Population in Canada With a History of Criminal Convictions

IMPORTANCE

People with criminal histories experience high rates of opioid dependence and are frequent users of acute health care services. It is unclear whether methadone adherence prevents hospitalizations.

OBJECTIVE

To compare hospital admissions during medicated and nonmedicated methadone periods.

DESIGN, SETTING, AND PARTICIPANTS

A retrospective cohort study involving linked population-level administrative data among individuals in British Columbia, Canada, with provincial justice contacts (n= 250 884) and who filled a methadone prescription between April 1, 2001, and March 31, 2015. Participants were followed from the date of first dispensed methadone prescription until censoring (date of death, or March 31, 2015). Data analysis was conducted from May 1 to August 31, 2018.

EXPOSURES

Methadone treatment was divided into medicated (methadone was dispensed) and nonmedicated (methadone was not dispensed) periods and analyzed as a time-varying exposure.

MAIN OUTCOME AND MEASURES

Adjusted hazard ratios (aHRs) of acute hospitalizations for any cause and cause-specific (substance use disorder [SUD], non-substance-related mental disorders [NSMDs], and medical diagnoses [MEDs]) were estimated using multivariable Cox proportional hazards regression.

RESULTS

A total of 11 401 people (mean [SD] age, 34.9 [9.4] years; 8230 [72.2%] men) met inclusion criteria and were followed up for a total of 69 279.3 person-years. During a median follow-up time of 5.5 years (interquartile range, 2.8-9.1 years), there were 19 160 acute hospital admissions. Dispensed methadone was associated with a 50% lower rate of hospitalization for any cause (aHR, 0.50; 95% CI, 0.46-0.53) during the first 2 years (≤2.0 years) following methadone initiation, demonstrating significantly lower rates of admission for SUD (aHR, 0.32; 95% CI, 0.27-0.38), NSMD (aHR, 0.41; 95% CI, 0.34-0.50), and MED (aHR, 0.57; 95% CI, 0.52-0.62). As duration of time increased (2.1 to ≤5.0 years; 5.1 to ≤10.0 years), methadone was associated with a significant but smaller magnitude of effect: SUD (aHR, 0.43; 95% CI, 0.36-0.52; aHR, 0.47; 95% CI, 0.37-0.61), NSMD (aHR, 0.51; 95% CI, 0.41-0.64; aHR, 0.60; 95% CI, 0.47-0.78), and MED (aHR, 0.71; 95% CI, 0.65-0.77; aHR, 0.85; 95% CI, 0.76-0.95).

CONCLUSIONS AND RELEVANCE

In this study, methadone was associated with a lower rate of hospitalization among a large cohort of Canadian individuals with histories of convictions and prevalent concurrent health and social needs. Practices to improve methadone adherence are warranted.