Carolyn Day

Changes in patterns of drug injection concurrent with a sustained reduction in the availability of heroin in Australia

Between 1996 and 2000, heroin was the drug most frequently injected in Australia, and viable heroin markets existed in six of Australias eight jurisdictions. In 2001, there was a dramatic and sustained reduction in the availability of heroin that was accompanied by a substantial increase in its price, and a 14% decline in the average purity of seizures analysed by forensic laboratories. The shortage of heroin constitutes a unique natural experiment within which to examine the impact of supply reduction. This paper reviews one important correlate of the shortage, namely changes in patterns of illicit drug injection. A number of studies have consistently suggested that between 2000 and 2001, there was a sizeable decrease in both prevalence and frequency of heroin injection among injecting drug users. These changes were accompanied by increased prevalence and frequency of stimulant injection. Cocaine was favoured in NSW, the sole jurisdiction in which a cocaine market was established prior to the heroin shortage; whereas methamphetamine predominated in other jurisdictions. Some data suggest that, at least in the short-term, some drug injectors left the market altogether subsequent to the reduced heroin availability. However, the findings that (1) some former heroin users switched their drug preference to a stimulant; and (2) subsequently attributed this change to the reduced availability of heroin, suggests that reducing the supply of one drug may serve to increase the use of others. Given the differential harms associated with the use of stimulants and opiates, this possibility has grave implications for Australia, where the intervention and treatment system is designed primarily to accommodate opiate use and dependence.

Assessment and treatment of hepatitis C virus infection among people who inject drugs in the opioid substitution setting: ETHOS study.

BACKGROUND Access to hepatitis C virus (HCV) treatment remains extremely limited among people who inject drugs (PWID). HCV assessment and treatment was evaluated through an innovative model for the provision of HCV care among PWID with chronic HCV infection. METHODS Enhancing Treatment for Hepatitis C in Opioid Substitution Settings (ETHOS) was a prospective observational cohort. Recruitment was through 5 opioid substitution treatment (OST) clinics, 2 community health centers, and 1 Aboriginal community controlled health organization in New South Wales, Australia. RESULTS Among 387 enrolled participants, mean age was 41 years, 71% were male, and 15% were of Aboriginal ethnicity. Specialist assessment was undertaken in 191 (49%) participants, and 84 (22%) commenced interferon-based treatment. In adjusted analysis, HCV specialist assessment was associated with non-Aboriginal ethnicity (adjusted odds ratio [AOR], 4.02; 95% confidence interval [CI], 2.05-7.90), no recent benzodiazepine use (AOR, 2.06; 95% CI, 1.31-3.24), and non-1 HCV genotype (AOR, 2.13; 95% CI, 1.32-3.43). In adjusted analysis, HCV treatment was associated with non-Aboriginal ethnicity (AOR, 4.59; 95% CI, 1.49-14.12), living with the support of family and/or friends (AOR, 2.15; 95% CI, 1.25-3.71), never receiving OST (AOR, 4.40; 95% CI, 2.27-8.54), no recent methamphetamine use (AOR, 2.26; 95% CI, 1.12-4.57), and non-1 HCV genotype (AOR, 3.07; 95% CI, 1.67-5.64). CONCLUSIONS HCV treatment uptake was relatively high among this highly marginalized population of PWID. Potentially modifiable factors associated with treatment include drug use and social support.

Hepatitis C-related discrimination among heroin users in Sydney: drug user or hepatitis C discrimination?

The hepatitis C virus (HCV) is a common infection among injecting drug users. There are currently few available data on the extent (or prevalence) of HCV-related discrimination. This study examined perceived discrimination among a sample of heroin users and sought to determine whether the discrimination was attributed to their drug user or HCV status. Heroin users were recruited through needle and syringe programmes and methadone clinics in Sydney and were asked about discrimination in the preceding 12 months. Four hundred and one heroin users were recruited, of whom 59% reported being HCV-positive. Discrimination was reported by 22% of the 237 IDUs who reported being HCV-positive, with 17% reporting that the discrimination occurred in the preceding 12 months. Sixty-seven incidents were reported, of which half were perceived to be due to their drug user status, 15% of these incidents were due to HCV status and 25% due to a combination of both. Twenty-five incidents occurred in a health-care setting, of which 13 resulted in the service being withheld. HCV is a serious public health concern, and if IDU are to be encouraged into drug treatment it is essential that service providers are perceived to be non-discriminatory. In managing IDU patients, health care workers need to be cognizant of the impact that their attitude has on treatment outcome.

The accessibility, acceptability, health impact and cost implications of primary healthcare outlets that target injecting drug users: A narrative synthesis of literature

BACKGROUND Injecting drug users (IDUs) are at increased risk of health problems ranging from injecting-related injuries to blood borne viral infections. Access to primary healthcare (PHC) is often limited for this marginalised group. Many seek care at emergency departments and some require hospital admission due to late presentation. The costs to both the individual and the health system are such that policymakers in some settings have implemented IDU-targeted PHC centres, with a number of models employed. However, there is insufficient evidence on the effectiveness of these centres to inform health service planning. A systematic review examining such interventions is not possible due to the heterogeneous nature of study designs. Nevertheless, an integrative literature review of IDU-targeted PHC may provide useful insights into the range of operational models and strategies to enhance the accessibility and acceptability of these services to the target population. METHODS Available literature describing the impact of IDU-targeted PHC on health outcomes, cost implications and operational challenges is reviewed. A narrative synthesis was undertaken of material sourced from relevant journal publications, grey literature and policy documents. RESULTS Several models have proven accessible and acceptable forms of PHC to IDUs, improving the overall healthcare utilisation and health status of this population with consequent savings to the health system due to a reduction in visits to emergency departments and tertiary hospitals. CONCLUSIONS Although such findings are promising, there remains a dearth of rigorous evaluations of these targeted PHC, with the public health impact of such outlets yet to be systematically documented.

The reliability of sensitive information provided by injecting drug users in a clinical setting: Clinician-administered versus audio computer-assisted self-interviewing (ACASI)

Abstract Research with injecting drug users (IDUs) suggests greater willingness to report sensitive and stigmatised behaviour via audio computer-assisted self-interviewing (ACASI) methods than during face-to-face interviews (FFIs); however, previous studies were limited in verifying this within the same individuals at the same time point. This study examines the relative willingness of IDUs to report sensitive information via ACASI and during a face-to-face clinical assessment administered in health services for IDUs. During recruitment for a randomised controlled trial undertaken at two IDU-targeted health services, assessments were undertaken as per clinical protocols, followed by referral of eligible clients to the trial, in which baseline self-report data were collected via ACASI. Five questions about sensitive injecting and sexual risk behaviours were administered to participants during both clinical interviews and baseline research data collection. “Percentage agreement” determined the magnitude of concordance/discordance in responses across interview methods, while tests appropriate to data format assessed the statistical significance of this variation. Results for all five variables suggest that, relative to ACASI, FFI elicited responses that may be perceived as more socially desirable. Discordance was statistically significant for four of the five variables examined. Participants who reported a history of sex work were more likely to provide discordant responses to at least one socially sensitive item. In health services for IDUs, information collection via ACASI may elicit more reliable and valid responses than FFI. Adoption of a universal precautionary approach to complement individually tailored assessment of and advice regarding health risk behaviours for IDUs may address this issue.

Initiation to heroin injecting among heroin users in Sydney, Australia: cross sectional survey.

BackgroundHeroin injection is associated with health and social problems including hepatitis C virus (HCV) transmission. Few studies have examined the circumstances surrounding initiation to heroin injecting, especially current users initiating others. The current study aimed to examine the age of first heroin use and injection; administration route of first heroin use; relationship to initiator; the initiation of others among a group of heroin users; and to examine these factors in relation to HCV status and risk.MethodHeroin users in Sydney were recruited through needle and syringe programs, a methadone clinic and snowballing. Participants were interviewed about their own initiation to heroin use, blood-borne virus risk and knowledge, and whether they had initiated others to heroin injecting. Information on HCV status was collected via self-report. Data was analysed using univariate and multivariate statistical techniques for Normally distributed continuous and categorical data.ResultsThe study recruited 399 heroin users, with a mean age of 31 years, 63% were male, 77% reported heroin as their primary drug and 59% were HCV positive (self-report). Mean age at first heroin use and injection was 19 and 21 years, respectively. The majority of heroin users commenced heroin use via injecting (65%), younger users (<25 years, 25–30 years) were less likely than older users (>30 years) to commence heroin use parenterally. Participants were initiated to injection mainly by friends (63%). Thirty-seven percent reported initiating others to heroin injection, but few factors were related to this behaviour. Those with longer heroin using careers were more likely to report initiating others to heroin injection, but were no more likely to have done so in the preceding 12 months. Participants who had initiated others were more likely to have shared injecting equipment (12 vs 23%), but were no more likely to be HCV positive (self-report) than those who did not.ConclusionInterventions to prevent heroin users initiating others to injecting are necessary. Peer groups may be well positioned to implement such interventions.

Using intervention time series analyses to assess the effects of imperfectly identifiable natural events: a general method and example

BackgroundIntervention time series analysis (ITSA) is an important method for analysing the effect of sudden events on time series data. ITSA methods are quasi-experimental in nature and the validity of modelling with these methods depends upon assumptions about the timing of the intervention and the response of the process to it.MethodThis paper describes how to apply ITSA to analyse the impact of unplanned events on time series when the timing of the event is not accurately known, and so the problems of ITSA methods are magnified by uncertainty in the point of onset of the unplanned intervention.ResultsThe methods are illustrated using the example of the Australian Heroin Shortage of 2001, which provided an opportunity to study the health and social consequences of an abrupt change in heroin availability in an environment of widespread harm reduction measures.ConclusionApplication of these methods enables valuable insights about the consequences of unplanned and poorly identified interventions while minimising the risk of spurious results.

Effects of reduction in heroin supply on injecting drug use: analysis of data from needle and syringe programmes

In early 2001 there was a dramatic decline in the availability of heroin in New South Wales (NSW), Australia, where previously heroin had been readily available at a low price and high purity.1 The decline was confirmed by Australias strategic early warning system, which revealed a reduction in heroin supply across Australia and a considerable increase in price,2 particularly from January to April 2001. This “heroin shortage” provided a natural experiment in which to examine the effect of substantial changes in price and availability on injecting drug use and its associated harms in Australias largest heroin market,2 a setting in which harm reduction strategies were widely used. Publicly funded needle and syringe programmes were introduced to Australia in 1987, and methadone maintenance programmes, which were established in the 1970s, were significantly expanded in 1985 and again in 1999. In NSW needle and syringe programmes are delivered primarily within the public sector through area health services. There is also a private sector programme, subsidised by the government, delivered through pharmacies (known as “fitpacks”). …

Alcohol and other drug use disorders among older-aged people.

In Australia people aged 65 years or older currently comprise 12.1% of the population. This has been estimated to rise to 24.2% by 2051. Until recently there has been relatively little research on alcohol and other drug use disorders among these individuals but, given the ageing population, this issue is likely to become of increasing importance and prominence. Epidemiological research shows a strong age-related decline in the prevalence of alcohol and other drug use disorders with age. Possible reasons for this include: age-related declines in the use and misuse of alcohol and other drugs; increased mortality among those with a lifetime history of alcohol and other drug use disorders; historical differences in exposure to and use of alcohol and other drugs. Despite the age-related decline in the prevalence of these disorders, they do still occur among those aged 65 years or older and, given historical changes in exposure to and use of illicit drugs, it likely that the prevalence of these disorders among older-aged individuals will rise. Specific issues faced by older-aged individuals with alcohol and other drug use problems are discussed. These include: interactions with prescribed medications, under-recognition and treatment of alcohol and drug problems, unintentional injury and social isolation. Finally, a brief discussion of treatment issues is provided.

Twenty-year trends in benzodiazepine dispensing in the Australian population

Considerable concern has been expressed about overprescribing of benzodiazepines and related harms. Past analyses have relied on World Health Organization‐defined daily doses (DDD) which are sometimes out of keeping with clinical usage. This study examines 20‐year (1992–2011) trends of benzodiazepine dispensing in Australia using both DDD and Ashton equivalent dose.