Utilization patterns and correlates of retention among clients of the needle exchange program in Baltimore, Maryland

Potential impact of curative and preventive interventions toward hepatitis C elimination in people who inject drugs-A network modeling study

BACKGROUND

Injection-equipment-sharing networks play an important role in hepatitis C virus (HCV) transmission among people who inject drugs (PWID). Direct-acting antiviral (DAA) treatments for HCV infection and interventions to prevent HCV transmission are critical components of an overall hepatitis C elimination strategy, but how they contribute to the elimination outcomes in different PWID network settings are unclear.

METHODS

We developed an agent-based network model of HCV transmission through the sharing of injection equipment among PWID and parameterized and calibrated the model with rural PWID data in the United States. We modeled curative and preventive interventions at annual coverage levels of 12.5 %, 25 %, or 37.5 % (cumulative percentage of eligible individuals engaged), and two allocation approaches: random vs targeting PWID with more injection partners (hereafter 'degree-based'). We compared the impact of these intervention strategies on prevalence and incidence of HCV infections. We conducted sensitivity analysis on key parameters governing the effects of curative and preventive interventions and PWID network characteristics.

RESULTS

Combining curative and preventive interventions at 37.5 % annual coverage with degree-based allocation decreased prevalence and incidence of HCV infection by 67 % and 70 % over two years, respectively. Curative interventions decreased prevalence by six to 12 times more than preventive interventions, while curative and preventive interventions had comparable effectiveness on reducing incidence. Intervention impact increased with coverage almost linearly across all intervention strategies, and degree-based allocation was always more effective than random allocation, especially for preventive interventions. Results were sensitive to parameter values defining intervention effects and network mean degree.

CONCLUSION

DAA treatments are effective in reducing both prevalence and incidence of HCV infection in PWID, but preventive interventions play a significant role in reducing incidence when intervention coverage is low. Increasing coverage, including efforts in reaching individuals with the most injection partners, preventing reinfection, and improving compliance and retention in preventive services can substantially improve the outcomes. PWID network characteristics should be considered when designing hepatitis C elimination programs.

Factors associated with sharing equipment among people who inject drugs: The role of community attachment in harm reduction and health promotion

INTRODUCTION

Sharing injecting equipment is a major route of transmission for blood borne viruses such as hepatitis C and HIV. Although needle and syringe programs are widely available throughout metropolitan Australia, rates of sharing equipment have not significantly changed in recent years. This study aimed to identify factors associated with recent equipment sharing among people who inject drugs in Australia.

METHODS

A paper-based survey was distributed via peer-based organisations between June and November 2018 and was completed by 603 participants. Survey questions addressed recent injecting experiences, equipment sharing, community attachment, stigma and wellbeing. Participants who had recently shared injecting equipment were compared with those who had not shared any equipment using multivariable logistic regression.

RESULTS

Recent equipment sharing was associated with recent heroin use, experiencing any past-year stigma related to injecting drug use, and higher levels of attachment to a community of people who inject drugs. An interaction effect showed increased community attachment was associated with increased odds of sharing equipment among young participants, but with decreased odds of sharing equipment among older participants.

DISCUSSION AND CONCLUSIONS

Community networks of people who inject drugs can play important roles in harm reduction initiatives. While being connected with a community of people who inject drugs increased the odds of sharing injecting equipment, this community connection also increases opportunities for social support, sharing information and mitigating the negative effects of stigma. Collaboratively and meaningfully engaging with communities of people who inject drugs has the potential to increase the reach and effectiveness of health promotion services.

Racial differences in overdose training, naloxone possession, and naloxone administration among clients and nonclients of a syringe services program

OBJECTIVE

To evaluate racial (Black/White) differences in overdose response training and take-home naloxone (THN) possession and administration among clients and nonclients of the Baltimore syringe service program (SSP).

METHODS

The study derived data from a cross-sectional survey of 263 (183 SSP clients, 80 nonclients) people who inject drugs (PWID). The study recruited SSP clients using targeted sampling and recruited nonclients through peer referral from April to November 2016.

RESULTS

In our sample, 61% of the participants were Black, 42% were between the ages of 18 and 44, and 70% were males. SSP clients, regardless of race, were more likely to have received overdose response training than Black nonclients (Black clients AOR: 3.85, 95% CI: 1.88, 7.92; White clients AOR: 2.73, 95% CI: 1.29, 5.75). The study found no significant differences in overdose response training between Black and White nonclients. SSP clients and White nonclients were more likely to possess THN than Black nonclients (Black clients: AOR: 4.21, 95% CI: 2.00, 8.87; White clients: AOR: 3.54, 95% CI: 1.56, 8.04; White nonclients AOR: 4.49, 95% CI: 1.50,13.47).

CONCLUSION

SSP clients were more likely to receive overdose response training than their nonclient peers who they referred to the study, illustrating the utility of SSPs in reaching PWID at high risk of overdose. We also observed that Black PWID, who did not access services at the SSP, were the least likely to possess THN, suggesting the need to employ outreach targeting Black PWID who do not access this central harm reduction intervention.

Factors Associated with Sterile Syringe Acquisition among People Who Inject Drugs in West Virginia

BACKGROUND

Syringe services programs (SSPs) are evidence-based interventions that provide essential overdose and infectious disease prevention resources to people who inject drugs (PWID). Little research has examined factors associated with sterile syringe acquisition at SSPs among rural PWID populations.

OBJECTIVES

We aim to identify factors associated with PWID in a rural county in West Virginia having recently acquired sterile syringes at an SSP.

METHODS

PWID (n = 420) completed a survey that included measures related to sociodemographics, structural vulnerabilities, and substance use. We used multivariable Poisson regression with robust variance estimation to examine independent associations with sterile syringe acquisition at an SSP.

RESULTS

Sixty-five percent of our sample reported having recently acquired sterile syringes at an SSP. Factors associated with recent sterile syringes acquisition at an SSP included: being older (aPR [adjusted prevalence ratio]: 1.011, 95% CI: 1.003-1.019), single (aPR: 0.862, 95% CI: 0.755-0.984), experiencing food insecurity (aPR: 1.233, 95% CI: 1.062-1.431), recently injecting fentanyl (aPR: 1.178, 95% CI: 1.010-1.375) and prescription opioid pain relievers (aPR: 0.681, 95% CI: 0.551-0.842), and recent naloxone acquisition (aPR: 1.360; 95% CI: 1.178-1.569). Receptive syringe sharing was inversely associated with acquiring sterile syringes at an SSP (aPR: 0.852; 95% CI: 0.741-0.979).

CONCLUSION

PWID accessing sterile syringes at an SSP was associated with several sociodemographic, structural, and substance use factors. Ensuring rural SSP operations are tailored to local PWID population-level needs is paramount to the prevention of infectious disease outbreaks and overdose fatalities.

A prospective cohort study of risk behaviours, retention and loss to follow-up over 5 years among women and men in a needle exchange program in Stockholm, Sweden

BACKGROUND

Needle exchange programs (NEP) are important in reducing risk behaviours among people who inject drugs (PWID), also exposed to HIV and hepatitis C (HCV) through injecting drug use (IDU). Women (WWID) compared to men who inject drugs (MWID), are particularly vulnerable with complex needs, however less is known about their risk determinants and NEP outcomes.

METHODS

In an open prospective NEP cohort, 697 WWID and 2122 MWID were followed, 2013-2018. Self-reported socio/drug-related determinants for receptive injection (needle/syringe and paraphernalia) and sexual risk behaviours at enrolment, lost to follow-up (LTFU) and probability of retention, were assessed for both groups. Multivariable logistic regression (adjusted odds ratios, aOR) for enrolment and Poisson regression (adjusted incidence rate ratios, aIRR) for LTFU, were used. Cumulative NEP-retention probability was analysed using a six- and 12-month scenario.

RESULTS

At NEP enrolment, injection risk behaviours among WWID were associated with: younger age; homelessness; amphetamine-IDU; non-participation in opioid substitution therapy (OST); history of custody and among MWID: lower education level; cohabitation; homelessness, being a tenant; amphetamine-IDU; non-participation in OST; history of being sectioned, HIV-negative and HCV-positive. Condomless sex among WWID was associated with: younger age; lower education-level; cohabitation; having a partner; amphetamine-IDU; non-participation in OST; being HIV-negative and HCV-positive and among MWID: younger age; married; cohabitation; having a partner; amphetamine-IDU; non-participation in OST; history of custody, prison and being HIV-negative. WWID had higher NEP-retention levels compared to MWID over time. Being LTFU among WWID was associated with being HIV-negative and reporting injection risk behaviours and among MWID, younger age, non-participation in OST, being HIV-negative and having protected sex.

CONCLUSIONS

Despite better NEP compliance among WWID, high injection and sexual risk behaviours in both gender-subgroups, especially in intimate relationships, suggests ongoing HCV and HIV-infection risks. Subgroup-variation in the NEP continuum of care warrants more gender-disaggregated research and tailoring gender-sensitive services may improve prevention, health and retention outcomes.

Could 30 years of political controversy on needle exchange programmes in Sweden contribute to scaling-up harm reduction services in the world?

Aims:

To end the hepatitis and AIDS epidemics in the world by 2030, countries are encouraged to scale-up harm reduction services and target people who inject drugs (PWID). Blood-borne viruses (BBV) among PWID spread via unsterile injection equipment sharing and to combat this, many countries have introduced needle and syringe exchange programmes (NEP), though not without controversy. Sweden’s long, complicated harm reduction policy transition has been deviant compared to the Nordic countries. After launch in 1986, no NEP were started in Sweden for 23 years, the reasons for which are analysed in this study.

Methods:

Policy documents, grey literature and research mainly published in 2000–2017 were collected and analysed using a hierarchical framework, to understand how continuous build-up of evidence, decisions and key events, over time influenced NEP development.

Results:

Sweden’s first NEP opened in a repressive-control drug policy era with a drug-free society goal. Despite high prevalence of BBV among PWID with recurring outbreaks, growing research and key-actor support including a NEP law, no NEP were launched. Political disagreements, fluctuating actor-coalitions, questioning of research, and a municipality veto against NEP, played critical roles. With an individual-centred perspective being brought into the drug policy domain, the manifestation of a dual drug and health policy track, a revised NEP law in 2017 and removal of the veto, Sweden would see fast expansion of new NEP.

Conclusions:

Lessons from the Swedish case could provide valuable insight for countries about to scale-up harm reduction services including how to circumvent costly time- and resource-intensive obstacles and processes involving ideological and individual moral dimensions.

Methamphetamine use and HIV risk behavior among men who inject drugs: causal inference using coarsened exact matching

BACKGROUND

Understanding the association between methamphetamine (MA) use and HIV risk behavior among people who inject drugs (PWID) will assist policy-makers and program managers to sharpen the focus of HIV prevention interventions. This study examines the relationship between MA use and HIV risk behavior among men who inject drugs (MWID) in Tehran, Iran, using coarsened exact matching (CEM).

METHODS

Data for these analyses were derived from a cross-sectional study conducted between June and July 2016. We assessed three outcomes of interest-all treated as binary variables, including distributive and receptive needle and syringe (NS) sharing and condomless sex during the month before interview. Our primary exposure of interest was whether study participants reported any MA use in the month prior to the interview. Firstly, we report the descriptive statistics for the pooled samples and matched sub-samples using CEM. The pooled and matched estimates of the associations and their 95% CI were estimated using a logistic regression model.

RESULTS

Overall, 500 MWID aged between 18 and 63 years (mean = 28.44, SD = 7.22) were recruited. Imbalances in the measured demographic characteristics and risk behaviors between MA users and non-users were attenuated using matching. In the matched samples, the regression models showed participants who reported MA use were 1.82 times more likely to report condomless sex (OR = 1.82 95% CI 1.51, 4.10; P = 0.031), and 1.35 times more likely to report distributive NS sharing in the past 30 days, as compared to MA non-users (OR = 1.35 95% CI 1.15-1.81). Finally, there was a statistically significant relationship between MA use and receptive NS sharing in the past month. People who use MA in the last month had higher odds of receptive NS sharing when compared to MA non-users (OR = 4.2 95% CI 2.7, 7.5; P = 0.013).

CONCLUSIONS

Our results show a significant relationship between MA use and HIV risk behavior among MWID in Tehran, Iran. MA use was related with increased NS sharing, which is associated with higher risk for HIV exposure and transmission.

Motivation to Change and Treatment Participation Among Syringe Service Program Utilizers in Rural Kentucky

PURPOSE

Kentucky experiences a disproportionate burden of substance use disorder (SUD), particularly in rural areas of the state. Multiple factors increase vulnerability to SUD and limit access to services in rural communities. However, the recent implementation and expansion of syringe service programs (SSPs) in rural Kentucky may provide a leverage point to reach at-risk people who inject drugs (PWID).

METHODS

Data were collected as part of an ongoing NIDA-funded study designed to examine uptake of SSPs among PWID in Appalachian Kentucky. Using Respondent Driven Sampling (RDS), the study enrolled a sample of 186 PWID SSP attenders across 3 rural Appalachian Kentucky counties and conducted face-to-face interviews regarding health behaviors, injecting practices, SSP utilization, and treatment services. Using logistic regression analyses, we examined consistent SSP use, as well as importance and confidence to reduce substance use as predictors of current treatment participation.

FINDINGS

For the prior 6 months, 44.6% of the sample reported consistent SSP use. Consistent use of SSPs was associated with treatment participation in the unadjusted logistic regression models. Significant predictors of treatment participation in the adjusted model included high confidence to reduce substance use, and not reporting primary methamphetamine injection.

CONCLUSIONS

Rurally located SSPs may play an important role in supporting confidence and motivation to change substance use behaviors among PWID impacted by SUD. SSPs may be critical venues for integration and expansion of prevention, health promotion, and treatment linkage services for this underserved population.

Association of Injection Practices and Overdose With Drug Use Typologies: A Latent Class Analysis Among People Who Inject Drugs in Baltimore, 2017

Increasing overdose mortality and new HIV outbreaks in the U.S. highlight the need to identify risk behavior profiles among people who inject drugs (PWID). We characterized latent classes of drug use among a community-based sample of 671 PWID in Baltimore during 2017 and evaluated associations of these classes with sharing syringes, obtaining syringes from pharmacies or syringe services programs (SSPs), and nonfatal overdose in the past 6 months. We identified three classes of current drug use: infrequent use (76% of participants), prescription drug use (12%), and heroin and/or cocaine injection (12%). PWID in the heroin and/or cocaine injection and prescription drug use classes had higher odds of both overdose and sharing syringes (relative to infrequent use). PWID in the prescription drug use class were 64% less likely to obtain syringes through SSPs/pharmacies relative to heroin and/or cocaine injection. Harm reduction programs need to engage people who obtain prescription drugs illicitly.

Stigma and drug use settings as correlates of self-reported, non-fatal overdose among people who use drugs in Baltimore, Maryland

BACKGROUND

Fatalities from opioid overdose quadrupled during the last 15 years as illicit opioid use increased. This study assesses how stigma and drug use settings are associated with non-fatal overdose to identify targets for overdose risk reduction interventions and inform overdose education and naloxone distribution programs.

METHODS

We surveyed 444 people who used drugs in Baltimore, Maryland, USA, from 2009 to 2013 as part of a randomized clinical trial of a harm reduction intervention. Participants reported demographic characteristics, drug use, overdose history, use of a local syringe services program, involvement in the local drug economy, and whether they experienced discrimination from others (i.e., enacted stigma) or stigmatized themselves (i.e., internalized stigma) related to their drug use. We used multinomial logistic regression models to identify correlates of experiencing a non-fatal overdose within the past year or >1 year ago relative to participants who never experienced an overdose.

RESULTS

Stigma was positively associated with experiencing a non-fatal overdose in the past year (adjusted Odds Ratio [aOR]: 1.7, 95% Confidence Interval [CI]: 1.1-2.7) and >1 year ago (aOR [95% CI]: 1.5 [1.1-2.0]) after adjustment for demographic and substance use characteristics. The association of stigma with overdose was stronger for enacted versus internalized stigma. The number of public settings (shooting gallery, crack house, abandoned building, public bathroom, outside) where participants used drugs was also positively associated with experiencing an overdose.

CONCLUSIONS

Stigma related to drug use and using drugs in more settings may increase overdose risk. The effectiveness of overdose prevention and naloxone training may be improved by reducing discrimination against people who use drugs in community and medical settings and diversifying the settings in which overdose prevention trainings are delivered. These efforts may be enhanced by use of peer outreach approaches in which people who use drugs diffuse prevention messages through their social networks and within settings of drug consumption outside the medical setting.

Impact of drug consumption rooms on risk practices and access to care in people who inject drugs in France: the COSINUS prospective cohort study protocol

INTRODUCTION

The high prevalence of hepatitis C and the persistence of HIV and hepatitis C virus (HCV) risk practices in people who inject drugs (PWID) in France underlines the need for innovative prevention interventions. The main objective of this article is to describe the design of the COSINUS cohort study and outline the issues it will explore to evaluate the impact of drug consumption rooms (DCR) on PWID outcomes. Secondary objectives are to assess how DCR (a) influence other drug-related practices, such as the transition from intravenous to less risky modes of use, (b) reduce drug use frequency/quantity, (c) increase access to treatment for addiction and comorbidities (infectious, psychiatric and other), (d) improve social conditions and (e) reduce levels of violence experienced and drug-related offences. COSINUS will also give us the opportunity to investigate the impact of other harm reduction tools in France and their combined effect with DCR on reducing HIV-HCV risk practices. Furthermore, we will be better able to identify PWID needs.

METHODS AND ANALYSIS

Enrollment in this prospective multi-site cohort study started in June 2016. Overall, 680 PWID in four different cities (Bordeaux, Marseilles, Paris and Strasbourg) will be enrolled and followed up for 12 months through face-to-face structured interviews administered by trained staff to all eligible participants at baseline (M0), 3 month (M3), 6 month (M6) and 12 month (M12) follow-up visits. These interviews gather data on socio-demographic characteristics, past and current drug and alcohol consumption, drug-use related practices, access to care and social services, experience of violence (as victims), offences, other psychosocial issues and perception and needs about harm reduction interventions and services. Longitudinal data analysis will use a mixed logistic model to assess the impact of individual and structural factors, including DCR attendance and exposure to other harm reduction services, on the main outcome (HIV-HCV risk practices).

ETHICS AND DISSEMINATION

This study was reviewed and approved by the institutional review board of the French Institute of Medical Research and Health (opinion number: 14-166). The findings of this cohort study will help to assess the impact of DCR on HIV-HCV risk practices and other psycho-social outcomes and trajectories. Moreover, they will enable health authorities to shape health and harm reduction policies according to PWID needs. Finally, they will also help to improve current harm reduction and therapeutic interventions and to create novel ones.

Geo-spatial analysis of individual-level needle and syringe coverage in Melbourne, Australia

Distance to health services is known to be negatively associated with usage and needle and syringe programs (NSPs) for people who inject drugs (PWID) are no different. Australia has a mixture of NSP modalities (primary or secondary fixed-site NSPs), which may present unique barriers to access. In this study, we explore 1) the effect of distance to NSPs on individual-level needle and syringe coverage, and 2) differences in coverage dependent on NSP modality. Using data from 219 PWID in an ongoing cohort study in Melbourne, Australia, we measured the straight-line distance from participants’ residence to their nearest primary or secondary fixed-site NSP. We analysed the relationship between geographical distance and coverage via regression analysis. The median distance to any type of NSP was 1872 metres. Regardless of service type, 52% of participants lived within 2 kms of a fixed-site NSP and 87% lived within 5 kms. We found no association between distance to NSPs and syringe coverage or a significant difference in coverage by nearest service type. Our findings suggest that the number and distribution of NSPs in Melbourne, Australia caters adequately for the population of PWID.

The association between neighborhood socioeconomic disadvantage and high-risk injection behavior among people who inject drugs

BACKGROUND

Although much research has been conducted on the determinants of HIV risk behavior among people who inject drugs (PWID), the influence of the neighborhood context on high-risk injection behavior remains understudied. To address this gap in the literature, we measured associations between neighborhood socioeconomic disadvantage and high-risk injection behavior, and determined whether these associations were modified by drug-related police activity and syringe exchange program (SEP) accessibility.

METHODS

Our sample was comprised of 484 pharmacy-recruited PWID in New York City. Measures of neighborhood socioeconomic disadvantage were created using data from the 2006-2010 American Community Survey. Associations with high-risk injection behavior were estimated using multivariable Poisson regression. Effect modification by drug-related police activity and SEP accessibility was assessed by entering cross-product terms into adjusted models of high-risk injection behavior.

RESULTS

Neighborhood socioeconomic disadvantage was associated with decreased receptive syringe sharing and unsterile syringe use. In neighborhoods with high drug-related police activity, associations between neighborhood disadvantage and unsterile syringe use were attenuated to the null. In neighborhoods with high SEP accessibility, neighborhood disadvantage was associated with decreased acquisition of syringes from an unsafe source.

CONCLUSIONS

PWID in disadvantaged neighborhoods reported safer injection behaviors than their counterparts in neighborhoods that were relatively better off. The contrasting patterns of effect modification by SEP accessibility and drug-related police activity support the use of harm reduction approaches over law enforcement-based strategies for the control of blood borne virus transmission among PWID in disadvantaged urban areas.

Young people who use drugs engaged in harm reduction programs in New York City: Overdose and other risks

BACKGROUND

Little is known about the engagement of young people who use drugs (PWUD) in harm reduction programs (HRPs), and few studies have included non-opioid users and non-injectors. While HRPs have effectively engaged PWUD, young people are under-represented in their services.

METHODS

The Injection Drug Users Health Alliance Citywide Study (IDUCS) is the largest community-based study of PWUD in HRPs in the US. From 2014-2015, 2421 HRP participants across New York City (NYC) completed a cross-sectional survey. We investigated differences in socio-demographics, service utilization, and risk behaviors between young (aged 18-30) and older participants and examined factors associated with overdose among young participants.

RESULTS

The study included 257 young participants. They were significantly more likely than older participants to be white, educated, uninsured, unstably housed or homeless, and have a history of incarceration and residential drug treatment. They were more likely to report recent overdose but less likely to report knowledge of naloxone. Young participants also had higher rates of alcohol, marijuana, benzodiazepine, and injection drug use, and related risk behaviors such as public injection. Factors associated with past year overdose among young participants included experiencing symptoms of psychological distress (AOR=9.71), being unstably housed or homeless (AOR=4.39), and utilizing detox (AOR=4.20).

CONCLUSIONS

Young PWUD who access services at HRPs in NYC differ significantly from their older counterparts. New York City and other urban centers that attract young PWUD should consider implementing harm reduction oriented services tailored to the unique needs of young people.

Syringe Sharing Among a Prospective Cohort of Street-Involved Youth: Implications for Needle Distribution Programs

The sharing of previously used syringes is associated with the transmission of Hepatitis C and HIV. This longitudinal study examines syringe borrowing and syringe lending within a prospective cohort of street-involved youth in Vancouver, Canada. From September 2005 to May 2014, data were collected from the At-Risk Youth Study, a cohort of street-involved youth age 14-26 at enrollment, and analyzed using generalized estimating equations. Among 505 participants, 142 (28.1%) reported syringe borrowing and 132 (26.1%) reported syringe lending during the study period. In separate multivariable analyses, having difficulty finding clean needles and homelessness were significantly associated with syringe borrowing (Adjusted Odds Ratio (AOR) = 2.28, 95% CI 1.66-3.12 and AOR = 1.52, CI 1.05-2.21, respectively) and syringe lending (AOR = 1.89, 95% CI 1.32-2.71 and AOR = 1.65, 95% CI 1.11-2.44, respectively) (all p values < 0.05). Findings highlight gaps in syringe access for vulnerable young injectors and suggest that service delivery for youth may be suboptimal. Further examination of how needle distribution efforts might be improved to better meet the needs of young people is warranted.

Enrolment and retention of people who inject drugs in the Needle & Syringe Exchange Programme in Malaysia

Setting: Needle and Syringe Exchange Programme (NSEP) implemented by non-governmental organisations in Malaysia. Objectives: To determine enrolment, characteristics and retention in the NSEP of people who inject drugs (PWID) between 2013 and 2015. Design: Retrospective cohort study. Results: There were 20 946 PWID, with a mean age of 38 years. The majority were male (98%) and of Malay ethnicity (92%). Follow-up data were available for 20 761 PWID. Annual retention of newly enrolled PWID for each year was respectively 85%, 87% and 78% for 2013, 2014 and 2015, although annual enrolment over these years declined from 10 724 to 6288 to 3749. Total person-years (py) of follow-up were 27 806, with loss to follow-up of 40 per 100 py. Cumulative probability of retention in NSEP was 66% at 12 months, 45% at 24 months and 26% at 36 months. Significantly higher loss to follow-up rates were observed in those aged 15-24 years or ⩾50 years, females, transgender people and non-Malay ethnic groups. Conclusion: Annual retention of new PWID on NSEP was impressive, although enrolment declined over the 3 years of the study and cumulative loss to follow-up was high. A better understanding of these programmatic outcomes is required.

High rates of abscesses and chronic wounds in community-recruited injection drug users and associated risk factors

OBJECTIVES

Abscesses and chronic wounds are common among injection drug users (IDUs) though chronic wounds have been understudied. We assessed the risk factors associated with both acute and chronic wounds within a community-based population of IDUs frequenting the Baltimore City Needle Exchange Program (BNEP).

METHODS

We performed a cross-sectional study of BNEP clients aged 18 years or more who completed an in-person survey regarding active or prior wounds including abscesses (duration <8 weeks) and chronic wounds (duration ≥8 weeks), injection practices, and skin care. Factors associated with wounds were analyzed using univariate and multivariate logistic regressions.

RESULTS

Of the 152 participants, 63.2% were men, 49.3% were white, 44.7% were African American, 34.9% had any type of current wound, 17.8% had an active abscess, and 19.7% had a current chronic wound. Abscesses were more common in women (odds ratio [OR], 2.56; 95% confidence interval [CI], 1.10-5.97) and those reporting skin-popping (OR, 5.38; 95% CI, 1.85-15.67). In a multivariate model, risk factors for an abscess included injecting with a family member/partner (adjusted OR [AOR], 4.06; 95% CI, 0.99-16.58). In a multivariable analysis of current chronic wounds, cleaning skin with alcohol before injection was protective (AOR, 0.061; 95% CI, 0.0064-0.58).

CONCLUSIONS

Abscesses and chronic wounds were prevalent among a sample of IDUs in Baltimore. Abscesses were associated with injection practices, and chronic wounds seemed linked to varying skin and tool cleaning practices. There is a pressing need for wound-related education and treatment efforts among IDUs who are at greatest risk for skin-related morbidity.

Assessing seasonality of travel distance to harm reduction service providers among persons who inject drugs

Background

Prior research has examined access to syringe exchange program (SEP) services among persons who inject drugs (PWID), but no research has been conducted to evaluate variations in SEP access based on season. This is an important gap in the literature given that seasonal weather patterns and inclement weather may affect SEP service utilization. The purpose of this research is to examine differences in access to SEPs by season among PWID in the District of Columbia (DC).

Findings

A geometric point distance estimation technique was applied to records from a DC SEP that operated from 1996 to 2011. We calculated the walking distance (via sidewalks) from the centroid point of zip code of home residence to the exchange site where PWID presented for services. Analysis of variance (ANOVA) was used to examine differences in walking distance measures by season. Differences in mean walking distance measures were statistically significant between winter and spring with PWID traveling approximately 2.88 and 2.77 miles, respectively, to access the SEP during these seasons.

Conclusions

The results of this study suggest that seasonal differences in SEP accessibility may exist between winter and spring. PWID may benefit from harm reduction providers adapting their SEP operations to provide a greater diversity of exchange locations during seasons in which inclement weather may negatively influence engagement with SEPs. Increasing the number of exchange locations based on season may help resolve unmet needs among injectors.

Consequences of a restrictive syringe exchange policy on utilisation patterns of a syringe exchange program in Baltimore, Maryland: Implications for HIV risk

INTRODUCTION AND AIMS

Syringe distribution policies continue to be debated in many jurisdictions throughout the USA. The Baltimore Needle and Syringe Exchange Program (NSP) operated under a 1-for-1 syringe exchange policy from its inception in 1994 through 1999, when it implemented a restrictive policy (2000-2004) that dictated less than 1-for-1 exchange for non-program syringes.

DESIGN AND METHODS

Data were derived from the Baltimore NSP, which prospectively collected data on all client visits. We examined the impact of this restrictive policy on program-level output measures (i.e. distributed : returned syringe ratio, client volume) before, during and after the restrictive exchange policy. Through multiple logistic regression, we examined correlates of less than 1-for-1 exchange ratios at the client level before and during the restrictive exchange policy periods.

RESULTS

During the restrictive policy period, the average annual program-level ratio of total syringes distributed : returned dropped from 0.99 to 0.88, with a low point of 0.85 in 2000. There were substantial decreases in the average number of syringes distributed, syringes returned, the total number of clients and new clients enrolling during the restrictive compared to the preceding period. During the restrictive period, 33 508 more syringes were returned to the needle exchange than were distributed. In the presence of other variables, correlates of less than 1-for-1 exchange ratio were being white, female and less than 30 years old.

DISCUSSION AND CONCLUSIONS

With fewer clean syringes in circulation, restrictive policies could increase the risk of exposure to HIV among Injection Drug Users (IDUs) and the broader community. The study provides evidence to the potentially harmful effects of such policies.

Comparison of chronic wound culture techniques: swab versus curetted tissue for microbial recovery

Health-care professionals are increasingly relying on wound cultures as part of their clinical assessment. Tissue viability nurses in the UK use wound swabbing as the standard specimen-taking technique, but others are used globally and there is no worldwide standard. This study compares two wound culture techniques in uninfected chronic wounds of active and former injection drug users seeking care through a civic needle exchange mobile wound clinic. For each wound, two sampling approaches were applied during the same visit: swab culture and curetted tissue culture. A total of 12 chronic wounds were assessed among 9 patients, including 19 swab cultures and 19 tissue cultures. These 38 cultures grew a total of 157 individually identified bacterial organisms, including 27 anaerobic organisms (17.2%), 63 Gram-positive species (40.1%), and 67 Gram-negative species (42.7%). The swab technique yielded a greater percentage recovery rate of anaerobic (55.6%), Gram-positive (52.4%), and all species (51.6%) compared to tissue culture (P>0.05). Recovery of common wound species, such as methicillin-sensitive Staphylococcus aureus, methicillin-resistant Staphylococcus aureus, and Pseudomonas aeruginosa was the same using either method (50.0%). Swab and curetted tissue cultures yielded similar recovery rates for common wound bacteria. Therefore, swabs (including a vacuum transport container) may offer an advantage in the recovery of anaerobes. Based upon this analysis, the swabbased culture method for chronic wounds currently used in the UK is reasonable.

Self-care and risk reduction habits in older injection drug users with chronic wounds: a cross-sectional study

Background

We surveyed a population of injection drug users (IDUs) frequenting the mobile Baltimore City Needle Exchange Program (BNEP) to investigate self-care factors associated with chronic wounds, a significant cause of morbidity especially among older IDUs.

Methods

Participants ≥18 years old completed a survey regarding chronic wounds (duration ≥8 weeks), injection and hygiene practices. Study staff visually verified the presence of wounds. Participants were categorized into four groups by age and wound status. Factors associated with the presence of chronic wounds in participants ≥45 years were analyzed using logistic regression.

Results

Of the 152 participants, 19.7% had a chronic wound. Of those with chronic wounds, 18 were ≥45 years old (60.0%). Individuals ≥45 years old with chronic wounds were more likely to be enrolled in a drug treatment program (Odds ratio (OR) 3.4, 95% Confidence interval (CI) 1.0–10.8) and less likely to use cigarette filters when drawing up prepared drug (OR 0.2, 95% CI 0.03–0.7) compared to the same age group without chronic wounds. Compared to individuals <45 years old without chronic wounds, individuals ≥45 with a chronic wound were more likely to report cleaning reused needles with bleach (OR 10.7, 95% CI 1.2–93.9) and to use the clinic, rather than an emergency room, as a primary source of medical care (OR 3.4, 95% CI 1.1–10.4).

Conclusions

Older IDUs with chronic wounds have different, and perhaps less risky, injection and hygiene behaviors than their peers and younger IDUs without wounds in Baltimore City. Because of these differences, older IDUs with wounds may be more receptive to community-based healthcare and substance abuse treatment messages.

Attitudes of regular injecting drug users towards the legal status of the major illicit drugs

INTRODUCTION AND AIMS

The study aimed to determine injecting drug users' (IDU) attitudes, and correlates of attitudes, towards continued prohibition, decriminalisation or legalisation of the major illicit drugs.

DESIGN AND METHODS

This study used structured interview with 300 IDUs who had injected on at least a weekly basis over the preceding 12 months.

RESULTS

Methamphetamine was rated the most harmful of the five illicit substances and cannabis the lowest. By far the highest level of support for legislative change was for cannabis, with only 8.7% supporting continued prohibition. While there was majority support for change to the legal status of heroin, the modal position was for decriminalisation. Support for changing the status of the three illicit psychostimulants was low, with the majority believing that methamphetamine (63.3%), cocaine (53.3%) and 3,4-methylenedioxy-N-methylamphetamine (53.3%) should remain illegal. Demographic characteristics were largely unrelated to attitudes. Lower levels of perceived harm were associated with increased likelihood of support for legalisation of all substances. Recent use was positively related to support for both decriminalisation and legality of heroin, but was not associated with views on other substances. Higher lifetime polydrug use was associated with support for the legalisation of heroin, methamphetamine, cocaine and 3,4-methylenedioxy-N-methylamphetamine.

DISCUSSION AND CONCLUSIONS

IDUs expressed nuanced views on different substances. In policy debates, care should be taken not to speak for IDUs by imputing their beliefs. It is clear that the fact that a group uses illegal drugs does not necessarily imply that they support changes to their legal status.

Difficulty accessing syringes mediates the relationship between methamphetamine use and syringe sharing among young injection drug users

Injection drug users (IDU) who use methamphetamine (MA) are at an increased risk of HIV infection due to engagement in injection-related risk behavior including syringe sharing. In this cohort study of young IDU aged 18-30, we investigated the relationship between injection MA use and syringe sharing, and whether difficulty accessing sterile syringes mediated this association. Behavioral questionnaires were completed by 384 IDU in Vancouver, Canada between October 2005 and May 2008. Generalized estimating equations were used to estimate direct and indirect effects. The median age of participants was 24 (IQR: 22–27) and 214 (55.7%) were male. Injecting MA was independently associated with syringe sharing. Mediation analyses revealed that difficulty accessing sterile syringes partially mediated the association between injecting MA and syringe sharing. Interventions to reduce syringe sharing among young methamphetamine injectors must address social and structural barriers to accessing HIV prevention programs.

Psychiatric distress, risk behavior, and treatment enrollment among syringe exchange participants

The present study evaluated psychiatric distress as a predictor of treatment enrollment in out-of-treatment injection opioid users newly registered at the Baltimore Needle Exchange Program (BNEP). Study participants (n=281) completed the Addiction Severity Index (ASI), the Risk Assessment Battery (RAB), and the Symptom Checklist-90 (SCL-90-R), and were randomly assigned to one of three different conditions for 4 months that evaluated referral strategies designed to promote treatment interest and enrollment. The Global Severity Index (GSI) of the SCL-90 was used as a measure of psychiatric distress. A logistic regression showed that higher GSI scores predicted more treatment enrollment (Adjusted OR=2.15, CI=1.10-4.23, p<0.05), after controlling for study condition, demographic variables, syringe exchange site, and severity of drug use. The results suggest that the data from the assessment of psychiatric distress in syringe exchange settings can be used to support motivational strategies for encouraging syringe exchangers to seek substance abuse treatment.