Association Between Opioid Agonist Therapy and Testing, Treatment Uptake, and Treatment Outcomes for Hepatitis C Infection Among People Who Inject Drugs: A Systematic Review and Meta-analysis.

BACKGROUND: People who inject drugs (PWID) experience barriers to accessing testing and treatment for hepatitis C virus (HCV) infection. Opioid agonist therapy (OAT) may provide an opportunity to improve access to HCV care. This systematic review assessed the association of OAT and HCV testing, treatment, and treatment outcomes among PWID. METHODS: Bibliographic databases and conference presentations were searched for studies that assessed the association between OAT and HCV testing, treatment, and treatment outcomes (direct-acting antiviral [DAA] therapy only) among PWID (in the past year). Meta-analysis was used to pool estimates. RESULTS: Of 9877 articles identified, 22 studies conducted in Australia, Europe, North America, and Thailand were eligible and included. Risk of bias was serious in 21 studies and moderate in 1 study. Current/recent OAT was associated with an increased odds of recent HCV antibody testing (4 studies; odds ratio (OR), 1.80; 95% confidence interval [CI], 1.36-2.39), HCV RNA testing among those who were HCV antibody-positive (2 studies; OR, 1.83; 95% CI, 1.27-2.62), and DAA treatment uptake among those who were HCV RNA-positive (7 studies; OR, 1.53; 95% CI, 1.07-2.20). There was insufficient evidence of an association between OAT and treatment completion (9 studies) or sustained virologic response following DAA therapy (9 studies). CONCLUSIONS: OAT can increase linkage to HCV care, including uptake of HCV testing and treatment among PWID. This supports the scale-up of OAT as part of strategies to enhance HCV treatment to further HCV elimination efforts.

Health and correctional staff acceptability of depot buprenorphine in NSW prisons.

BACKGROUND: Provision of opioid agonist treatment (OAT) in custodial settings is resource-intensive and may be associated with diversion, non-medical use, and violence. A clinical trial of a new OAT, depot buprenorphine (the UNLOC-T study), provided the opportunity to obtain health and correctional staff perspectives regarding this treatment prior to widespread roll-out. METHODS: Sixteen focus groups with 52 participants were conducted, including 44 health staff (nurses, nurse practitioners, doctors, and operational staff) and eight correctional staff. RESULTS: Key challenges to providing OAT identified as potentially being addressed by depot buprenorphine included 1) patient access, 2) OAT program capacity, 3) treatment administration procedures, 4) medication diversion and other safety issues and, 5) impact on other service delivery. CONCLUSIONS: The introduction of depot buprenorphine into correctional settings was considered to have the potential to increase safety for patients, improve staff / patient relations and advance patient health outcomes via expanded treatment coverage and efficiencies gained through enhanced health service delivery. Support was almost universal from both correctional and health staff participating in this study. These findings build on emerging research regarding the positive impact of more flexible OAT programs and could be used to engage support for the implementation of depot buprenorphine from staff in other secure settings.

Concordance between self-reported and current hepatitis C virus infection status in a sample of people who inject drugs in Sydney and Canberra, Australia.

INTRODUCTION: Awareness of hepatitis C virus (HCV) status among people who inject drugs is critical to ensure linkage to care and reduce transmission risk. Testing pathways, confusion about results and possible reinfection raise potential for discordance between perceived and actual HCV status among people who inject drugs. We evaluated self-reported and serologically confirmed HCV status concordance among a sample of Australian people who inject drugs. METHODS: Data were collected in May-June 2018 from participants in Canberra and Sydney, Australia, who had injected drugs at least monthly in the past 6 months. Participants completed a structured interview assessing self-reported HCV status and provided a dried blood spot sample for HCV RNA testing. RESULTS: Of 103 participants, 95% self-reported ever receiving antibody testing, 58% of whom reported having received RNA testing. Seventy-three percent of participants reported never having been told that they had HCV, 18% reported current infection and 9% did not know their current status. According to dried blood spot RNA testing, 20% were currently infected. Over a quarter of the sample (28%, n = 29) did not accurately report their HCV status, half of whom were unaware of a current infection. DISCUSSION AND CONCLUSIONS: With over one-quarter of the sample in our study not accurately reporting their current HCV status, our findings reinforce the importance of regular testing for active infection, and the need for improved health literacy on HCV antibody and RNA test results, HCV status post-treatment and reinfection risk.

Hepatitis C virus cascade of care among people who inject drugs in Australia: Factors associated with testing and treatment in a universal healthcare system.

BACKGROUND: Understanding factors associated with engagement across the hepatitis C virus (HCV) cascade of care (CoC) among people who inject drugs (PWID) is critical for developing targeted interventions to enhance engagement and further HCV elimination efforts. We describe the CoC among Australian PWID, and identify factors associated with engagement at each stage. METHODS: As part of the 2018 and 2019 Illicit Drug Reporting System, Australians who regularly inject drugs reported lifetime HCV antibody and RNA testing, treatment uptake and completion. Multivariable logistic regression identified characteristics associated with outcomes. RESULTS: Of 1499 participants, 87% reported antibody testing. Of those, 70% reported RNA testing, of whom 60% reported being RNA positive. Among those, 76% reported initiating treatment, 78% of whom completed. Incarceration history (adjusted odds ratio 1.90; 95% confidence interval 1.28-2.82), current opioid agonist treatment (OAT) (1.99; 1.14-3.47), and recent alcohol and other drug (AOD) counselling (2.22; 1.27-3.88) were associated with antibody testing. Incarceration history (1.42; 1.07-1.87), and current OAT (2.07; 1.51-2.86) were associated with RNA testing. Current OAT (1.92; 1.22-3.03) and recent AOD counselling (1.91; 1.16-3.13) were associated with treatment uptake. Methamphetamine as drug injected most often in the last month was associated with reduced odds of antibody (0.41; 0.25-0.66) and RNA testing (0.54; 0.40-0.74), compared to heroin. CONCLUSION: CoC engagement amongst Australian PWID is encouraging, with AOD service engagement associated with testing and treatment. Further efforts to reach those not service engaged, particularly those not receiving OAT or who predominantly inject methamphetamine, are needed to achieve HCV elimination targets.

Use of alcohol swabs to clean injecting sites among people who regularly inject drugs in Australia.

INTRODUCTION AND AIMS: Cleaning drug injection sites with alcohol swabs prior to injecting reduces risk of abscesses and other skin and soft tissue infections (SSTI). Better understanding of swabbing behaviours can inform interventions to improve injecting hygiene. We aimed to determine the socio-demographic, drug use and injecting risk exposure correlates of swabbing prior to injecting and reasons for not swabbing. DESIGN AND METHODS: The Illicit Drug Reporting System recruited participants who had injected drugs at least monthly in the past six months in June-July 2017 from all Australian capital cities via needle and syringe programs and word-of-mouth. A structured interview was used to collect information on drug use and related behaviour, as well as swabbing practices. Logistic regression was used to identify factors associated with not swabbing at last injection. RESULTS: Of 853 respondents, one-quarter (26%) reported that they did not swab prior to their last injection. In adjusted analyses, crystal methamphetamine as the last drug injected, past month receptive or distributive syringe sharing, and past month re-use of one's own needle were significantly associated with not swabbing at last injection. Among participants who did not swab at last injection, swabbing was frequently considered unnecessary and a small number disliked using alcohol swabs. DISCUSSION AND CONCLUSIONS: Efforts are needed to increase awareness of the importance of injecting hygiene in preventing SSTI. Interventions to increase swabbing should be included as part of a wider package of injecting hygiene education, particularly in light of associations with receptive and/or distributive syringe sharing.

Uptake of direct acting antiviral therapies for the treatment of hepatitis C virus among people who inject drugs in a universal health-care system.

INTRODUCTION AND AIMS: Direct acting antiviral (DAA) treatment can reduce hepatitis C virus (HCV) infection incidence and mortality, although large scale uptake of these treatments is necessary to achieve those reductions. Targeting people who inject drugs (PWID) will be crucial to achieve the necessary reductions. Previously, treatment uptake has been very low (1-2%) among PWID, but these new DAAs have been subsidised in Australia since March 2016. This study describes treatment uptake among a sample of PWID in Australia and examines sociodemographic and drug use variables associated with treatment uptake. DESIGN AND METHODS: An Australian national cross-sectional sample (n = 817) of regular PWID drawn from a convenience sentinel sample aged ≥18 years. Information on demographics, drug use, HCV antibody testing, RNA testing, recent DAA treatment initiation and DAA prescriber settings was collected via an interviewer-administered survey. RESULTS: There were 291 HCV RNA positive participants, of who one-third reported initiating DAA treatment since the introduction of subsidised DAA medications. Current opioid substitution treatment was significantly associated with increased treatment uptake (adjusted odds ratio 2.20, 95% confidence interval 1.31, 3.68) while those with unstable housing were less likely to initiate treatment (adjusted odds ratio 0.42, 95% confidence interval 0.22, 0.82). DISCUSSION AND CONCLUSIONS: This study found that DAA treatment uptake has increased among current PWID, a priority population for treatment. Efforts to maintain this uptake through linking current PWID with treatment providers through harm reduction services such as opioid substitution therapy, needle and syringe programs, and outreach services are required to meet incidence and mortality reduction targets.

Hepatitis C testing in general practice settings: A cross-sectional study of people who inject drugs in Australia.

BACKGROUND: People who inject drugs (PWID) often do not receive confirmatory RNA testing following positive HCV antibody testing. Expanding access to adequate testing and assessment will improve the progression of patients through the HCV care cascade with the potential to improve diagnosis as well as linkage to treatment. We aimed to determine current utilisation of general practitioners (GPs) by PWID in Australia compared to other settings for HCV testing and post-test discussions. METHODS: A national sample (n=888) of people who had injected drugs regularly in the past 6 months was interviewed about HCV antibody, RNA testing, and post-test discussions, and the settings where these took place. RESULTS: The majority of participants (n=735; 93%) reported antibody testing. Among participants who reported a positive result (n=435), 54% identified their regular GP as the setting where their most recent antibody test was conducted. Confirmatory RNA testing was reported by 60% (n=274) of those who reported being antibody positive. Among those who reported RNA testing (n=257), the most common setting reported was their regular GP (48%). There were no differences in the proportions who recalled post-test discussions at GPs compared to other settings. CONCLUSION: HCV testing was most frequently undertaken by participants' regular GP. GPs are currently providing testing and post-test discussions at similar proportions to other more specialised settings. However, RNA testing is incomplete for more than one-third of the antibody positive PWID interviewed. Our findings suggest that the general practice setting is a common and accessible setting for PWID to access HCV testing. Targeting GPs to improve follow-up of positive antibody tests may help to improve patient progression through the HCV care cascade.

Motivations for new psychoactive substance use among regular psychostimulant users in Australia.

BACKGROUND: Examine the motivations for new psychoactive substance (NPS) use amongst a sample of regular psychostimulant users (RPU) in Australia, and determine whether motivations differ across substances. METHOD: Data were obtained from 419 RPU interviewed for the 2014 Ecstasy and related Drugs Reporting System who reported lifetime NPS use. Based on the most recent NPS used, motivations for use were rated on an 11-point scale (0 'no influence'-10 'maximum influence'). RESULTS: For NPS overall, value for money was found to be the most highly endorsed motivation for use, scoring a median of five out of ten. However, there was substantial variation in motivations for use across substance types. Availability (i.e. no other drug was available to me at the time; 6/10) was the most highly endorsed motivation for the use of synthetic cathinones, which was significantly higher than reported for DMT. Perceived legality and availability were the most highly endorsed motivations for synthetic cannabinoids (5/10); perceived legality scored higher for synthetic cannabinoids than for all the other NPS, whilst in regards to availability synthetic cannabinoids scored significantly higher than DMT only. Value for money was the most highly endorsed motivation for NBOMe (8/10) and 2C-family substances (5/10); in regards to NBOMe this scored significantly higher than all other NPS. Short effect duration was the most highly endorsed motivation for DMT (7/10), which was significantly higher than for all other NPS. CONCLUSION: Synthetic cathinones and cannabinoids appear to be largely motivated by 'opportunistic' reasons (i.e. availability, legality), while NBOMe, 2C-family substances and DMT appear to be motivated by particular desirable qualities of a substance (i.e. value for money, short effect duration). Providing a nuanced understanding of why individuals use particular NPS improves our ability to understand the NPS phenomenon and to tailor harm reduction messages to the appropriate target groups.

How does the use of multiple needles/syringes per injecting episode impact on the measurement of individual level needle and syringe program coverage?

BACKGROUND: Recent work by McCormack et al. (2016) showed that the inclusion of syringe stockpiling improves the measurement of individual-level syringe coverage. We explored whether including the use of a new parameter, multiple sterile syringes per injecting episode, further improves coverage measures. METHODS: Data comes from 838 people who inject drugs, interviewed as part of the 2015 Illicit Drug Reporting System. Along with syringe coverage questions, the survey recorded the number of sterile syringes used on average per injecting episode. We constructed three measures of coverage: one adapted from Bluthenthal et al. (2007), the McCormack et al. measure, and a new coverage measure that included use of multiple syringes. Predictors of multiple syringe use and insufficient coverage (<100% of injecting episodes using a sterile syringe) using the new measure, were tested in logistic regression and the ability of the measures to discriminate key risk behaviours was compared using ROC curve analysis. RESULTS: 134 (16%) participants reported needing multiple syringes per injecting episode. Women showed significantly increased odds of multiple syringe use, as did those reporting injection related injuries/diseases and injecting of opioid substitution drugs or pharmaceutical opioids. Levels of insufficient coverage across the three measures were substantial (20%-28%). ROC curve analysis suggested that our new measure was no better at discriminating injecting risk behaviours than the existing measures. CONCLUSION: Based on our findings, there appears to be little need for adding a multiple syringe use parameter to existing coverage formulae. Hence, we recommend that multiple syringe use is not included in the measurement of individual-level syringe coverage.

Estimating prevalence of drug and alcohol presentations to hospital emergency departments in NSW, Australia: impact of hospital consultation liaison services.

The impact of drug and alcohol misuse has been the subject of widespread media discussion in the past year, particularly in the context of restricted alcohol trading hours in an effort to reduce alcohol-fuelled violence. A recent study evaluating NSW Health's drug and alcohol consultation liaison (CL) services1 demonstrates how pervasive drug and alcohol problems are, and the impact they have on the health system. This paper highlights how expanding CL services to fill current unmet need could deliver a range of benefits to patients and hospitals.

Evaluating the Impact of Hospital Based Drug and Alcohol Consultation Liaison Services.

Consultation liaison (CL) services provide direct access to specialist services for support, treatment advice and assistance with the management of a given condition. Alcohol and other drugs (AOD) CL services aim to improve identification and treatment of patients with AOD morbidity. Our objective was to evaluate the costs and consequences of AOD CL services in hospitals in New South Wales, Australia. Patients were surveyed at eight hospitals and problematic AOD use was identified using the Alcohol, Smoking and Substance Involvement Screening Test (n=1615). For consenting participants, medical record data were obtained from 18 months pre- to 12 months post-survey. We used interrupted time series analyses to compare utilization and costs for patients with and without AOD problems and changes over time between those who received AOD CL and similar patients. Approximately 35% of patients surveyed had AOD problems (excluding tobacco) with 7% requiring intensive treatment. Only 24% of patients requiring intensive treatment were treated by AOD CL. Those treated had relative improvements over time in the cost of presentations to emergency departments, emergency admission performance and increased uptake of appropriate pharmaceuticals. The estimated net benefit of AOD CL services was at least AUD$100,000 savings per hospital per year. Expanding AOD CL services to address current unmet need may lead to even greater cost savings for hospitals.

The hidden costs of drug and alcohol use in hospital emergency departments.

INTRODUCTION AND AIMS: This study estimates the burden of drug and alcohol morbidity on hospitals in New South Wales (NSW) by observing a multi-site collective sample utilising survey information and data linkage. Specifically we aimed to determine the prevalence of alcohol and other drug (AOD) problems and to estimate patterns of utilisation of hospital services, costs of presentations, and admissions for patients with AOD problems. DESIGN AND METHODS: Patients were recruited from eight NSW public hospitals presenting to the hospital emergency department over a 10 day period. Participants completed a self-administered survey with demographic characteristics and questions about substance use. More than two-thirds (68%) of participants consented to provide access to their NSW Health medical data for a period spanning 2.5 years. RESULTS: One-third (35%) of the total sample were identified as having problematic AOD use with one in five of these patients requiring a high level of intervention. Those patients requiring a high level of intervention present more often and cost more per presentation. If admitted they were more likely to have longer stays and were also more likely to be admitted to a psychiatric ward and have a longer stay in the ward. DISCUSSION: This study demonstrates a need for AOD interventions in the emergency department setting, both because it represents an opportunity for intervention in a population in which problems with substance use is highly prevalent, and because there is evidence that AOD imposes additional costs on the health system. [Butler K, Reeve R, Arora S, Viney R, Goodall S, van Gool K, Burns L. The hidden costs of drug and alcohol use in hospital emergency departments. Drug Alcohol Rev 2016;35:359-366].

New psychoactive substance use among regular psychostimulant users in Australia, 2010-2015.

OBJECTIVE: To examine the rates and patterns of new psychoactive substance (NPS) use amongst regular psychostimulant users (RPU) in Australia. METHOD: Data were obtained from the 2010-2015 Ecstasy and related Drugs Reporting System (EDRS), which comprised a total cross-sectional sample of 4122RPU. RESULTS: Recent use of 'any' NPS increased from 33% in 2010 to 40% in 2015, although trends of use differed significantly across NPS classes. The correlates associated with NPS use also varied across NPS classes: frequent (i.e. weekly or more) ecstasy users were more likely to report recent phenethylamine use; LSD users were more likely to report recent phenethylamine and tryptamine use; and daily cannabis users were more likely to report recent synthetic cannabinoid use than RPU who had not used NPS. 'Poly' NPS consumers were found to be a particularly high risk group and were significantly more likely to be younger, male, report daily cannabis use, report weekly or more ecstasy use, report recent LSD use, have higher levels of poly drug use, have overdosed on any drug in the past year, and to have engaged in past month criminal activity. CONCLUSION: NPS use has been established as a significant and ongoing practice amongst our sample of RPU. It appears that RPU seek out NPS with similar properties to the illicit drugs that they are already consuming, with poly NPS consumers found to be a particularly high risk group.

Characterising dark net marketplace purchasers in a sample of regular psychostimulant users.

BACKGROUND: The past five years has seen a proliferation in marketplaces operating on the 'dark net' selling licit and illicit substances. While monitoring systems have investigated the specific substances for sale on these marketplaces, less is known about consumer motivations for accessing these marketplaces and factors associated with their use. METHODS: An Australian national sample (n=800) recruited on the basis of regular psychostimulant use was recruited and asked about purchasing substances from dark net marketplaces and the reasons for doing so. Respondents who had purchased any drug from a dark net marketplace in the preceding year were compared to those who had not in terms of demographic information and factors including drug use, criminal activity, and sexual and mental health. RESULTS: Nine percent (n=68) of the sample had purchased from dark net markets in the past year. MDMA, LSD and cannabis were the three most commonly purchased substances, and the main benefits cited for purchasing online were the better quality and lower cost of drugs available. Controlling for other factors, participants who purchased from dark net marketplaces in the past year tended to be younger, more likely to be involved in recent property crime and to have used more classes of drugs in the preceding six months, specifically psychedelics and 'new psychoactive drugs'. CONCLUSIONS: Though a small minority of participants reported having purchased drugs online in the preceding six months, these appeared to be a more 'entrenched' group of consumers, with more diverse substance use and rates of criminal activity. For consumers in the current sample reporting recent dark net usage, country borders are now less of a significant barrier to purchase and there is a wider range of substances available than ever before.

The Potential Reach of Opioid Substitution Settings to Deliver HCV Care to People Who Inject Drugs in Australia.

BACKGROUND: Recent efforts in Australia to engage people who inject drugs (PWID) in hepatitis C (HCV) care have focussed on opioid substitution treatment (OST) services as a delivery site. This approach potentially excludes non-opioid using PWID. This study aimed to determine differences between those currently receiving OST and those not among a sample of PWID. METHODS: Additional questions on HCV testing were included in the 2013 Illicit Drug Reporting System (IDRS), an annual sentinel surveillance system. The IDRS recruits PWID in all Australian capital cities from a range of sources, predominantly needle and syringe programs. All participants are reimbursed AUD$40 for a ~45 minute interview-administered survey. RESULTS: Current OST was reported by 44% of the total sample, and two-thirds reported an opioid as their drug of choice. Those participants who reported current OST were significantly more likely than those not in OST to report heroin as their drug of choice (65% vs. 43%, p<0.0.001) and the drug injected most often (53% vs. 30%, p<0.001). Compared to those in OST, those not in OST were more likely to report methamphetamine as their drug of choice (29% vs. 14%, p<0.001) or drug injected most often (33% vs. 17%, p<0.001). Current OST clients were more likely to have been tested for HCV antibodies (anti-HCV) than those not in OST (96% vs. 93%, p<0.05) and to report an anti-HCV positive result (75% vs. 64%, p<0.001). Those receiving OST were no more likely than those not to undergo further HCV-related testing (e.g. RNA) (62% vs. 56%, p=0.136). Both groups reported further HCV-related testing was undertaken primarily at a community general practice. DISCUSSION: Despite a large proportion of current PWID receiving OST, there remains a substantial minority who are neither seeking nor eligible for treatment. Efforts to improve access to HCV care for PWID in Australia therefore need to be expanded beyond OST, especially given the large proportion of participants who reported inadequate HCV testing.

Driving under the influence among frequent ecstasy consumers in Australia: trends over time and the role of risk perceptions.

BACKGROUND: Driving under the influence (DUI) of alcohol and illicit drugs is a serious road safety concern. This research aimed to examine trends in DUI across time and changes in attitudes towards the risks (crash and legal) associated with DUI among regular ecstasy users (REU) interviewed in Australia. METHODS: Participants were regular (at least monthly) ecstasy users surveyed in 2007 (n=573) or 2011 (n=429) who had driven a car in the last six months. Face to face interviews comprised questions about recent engagement of DUI and roadside breath (alcohol) and saliva (drug) testing. Participants also reported the risk of crash and of being apprehended by police if DUI of alcohol, cannabis, ecstasy, and methamphetamine. RESULTS: There were significant reductions in DUI of psychostimulants (ecstasy, methamphetamine, cocaine, LSD) but not alcohol or cannabis between 2007 and 2011. This was accompanied by increased experience of roadside saliva testing and increases in crash and legal risk perceptions for ecstasy and methamphetamine, but not alcohol or cannabis. When the relationship between DUI and risk variables was examined, low crash risk perceptions were associated with DUI of all substances and low legal risk perceptions were associated with DUI of ecstasy. CONCLUSIONS: The observed reduction in DUI of psychostimulants among frequent ecstasy consumers may be related to increased risk awareness stemming from educational campaigns and the introduction of saliva testing on Australian roads. Such countermeasures may be less effective in relation to deterring or changing attitudes towards DUI of cannabis and alcohol among this group.