Mortality among injecting drug users: a critical reappraisal

Health-associated quality of life impairment in people who inject drugs (PWID) after bloodstream infection

BACKGROUND

People who inject drugs (PWID) have high rates of bloodstream infections (BSI) with Staphylococcus aureus (SA) and group A streptococcus (GAS). Little is known about health-related quality of life outcomes after BSI.

METHODS

We performed a prospective pilot cohort study of patients with BSI due to SA or GAS. Health-related quality of life, anxiety, depression and cognitive function were assessed using validated tools (EQ5-5D-5L), Hospital Anxiety and Depression Score (HADS) and Montreal Cognitive Assessment (MOCA) at baseline, 28 days post-discharge and 6 months post-infection.

FINDINGS

66 patients were recruited over a 12-month period, including 17 PWID. For the whole cohort, global health rank improved from baseline to day 28 (median 40 to 60, p=0.002), with no significant improvement from day 28 to day 168 (median 60 to 75, p=0.161). At baseline, PWID had lower overall health-related quality of life than non-PWID (median 25 vs 45, p=0.229), persisting at day 28 (non-PWID median 65, PWID median 43, p=0.036) and day 168 (non-PWID median 75, PWID median 40, p=0.035). This difference was driven by worse scores in the EQ-5D-5L mental health component and HADS, with HADS scores being significantly impaired in PWID at baseline (p=0.001) and day 28 (p=0.007).

CONCLUSION

PWID have impaired health-related quality of life after SA and GAS BSI that persists for up to 6 months. Poor mental health is the major component of this, and further studies could clarify if this is a target for intervention.

A Hazard Analysis of Risk Factors of Mortality in Individuals Who Inject Drugs in Denver CO

Despite multiple risk factors for mortality among People Who Inject Drugs (PWID), more research is warranted that examines sub-populations within PWID. Mortality data from PWID participating in longitudinal HIV prevention research in Denver were obtained from The Colorado Department of Public Health and Environment. Risk factors for both all-cause and acute-toxicity related mortality were analyzed using Cox proportional hazards regression. Two-thousand seven individuals were interviewed at baseline. Eighty-six individuals died during the time frame of the study, 58 of which were due to acute-toxicity. Disabled (HR = 3.3, p < 0.001), gay/lesbian-identified (HR = 2.6, p = 0.03), white race/ethnicity (HR = 2.4, p = 0.003), and use of a shared cooker (HR = 2.1, p = 0.01) were important adjusted risk factors. These suggest that drug and HIV interventions should utilize techniques that can address the needs of marginalized populations in addition to HIV drug risk behaviors.

HIV and Hepatitis C Virus Infection and Risk Behaviors Among Heterosexual, Bisexual, and Lesbian Women Who Inject Drugs in Australia

PURPOSE

Women who inject drugs (WWID) are vulnerable to a range of harms, including exposure to sexually transmitted and blood-borne infections, abusive relationships, physical and sexual violence and mental health issues. Lesbians and bisexual women are at greater risk than heterosexual women for substance use disorders. This study aimed to compare a large sample of heterosexual, bisexual, and lesbian WWID and to identify correlates of sexual orientation.

METHODS

The Australian Needle and Syringe Program (NSP) Survey is an annual cross-sectional survey. People who inject drugs (PWID) who attend NSP services are invited to complete a brief self-administered questionnaire and provide a capillary dried blood spot. Of 22,791 survey respondents between 2004-2013, one third were women (n=7,604). Analyses were restricted to the first participation record for each respondent.

RESULTS

Of the 5,378 individual women, 4,073 (76%) identified as heterosexual, 1,007 (19%) identified as bisexual, and 298 (6%) identified as lesbian. HIV prevalence was low (<1.0%). More than half (56%) had been exposed to hepatitis C virus (HCV), with prevalence highest among bisexual women (59%). In adjusted analysis, bisexual women had significantly greater odds of initiating injection at a younger age (AOR 1.44, 95% CI 1.19-1.73), and reporting public injection (AOR 1.44, 95% CI 1.21-1.73) and receptive sharing of drug preparation equipment (AOR 1.20, 95% CI 1.00-1.44). Bisexual women (AOR 1.42, 95% CI 1.07-1.88) and lesbians (AOR 1.63, 95% CI 1.10-2.44) had significantly greater odds of reporting sex work than their heterosexual counterparts.

CONCLUSION

Results contribute to the literature on HIV and HCV transmission risk among WWID. Analysis of the relationship between sexual orientation and risk behavior identified bisexual orientation as independently associated with increased risk. Services that target PWID need to recognise and address a broad range of sexual identities and behaviors. Future research should explore reasons for increased risk in sexual minority women.

Mortality and cause of death in a cohort of people who had ever injected drugs in Glasgow: 1982-2012

BACKGROUND

To describe all-cause and cause-specific mortality in a cohort of people who had ever injected drugs (PWID) with a low prevalence of HIV over 20-30 years.

METHODS

Using a retrospective study design, identifying data from a cohort of PWID recruited between 1982 and 1993 through in-patient drug treatment services were linked to National Records for Scotland deaths data using probabilistic record linkage. We report all-cause and cause-specific mortality rates; standardized mortality ratios (SMR) across time, gender and age were estimated.

RESULTS

Among 456 PWID, 139 (30.5%) died over 9024 person-years (PY) of follow-up. Mortality within the cohort was almost nine times higher than the general population, and remained elevated across all age groups. The greatest excess mortality rate was in the youngest age group, who were 15-24 years of age (SMR 31.6, 95% CI 21.2-47.1). Drug-related deaths declined over time and mortality was significantly higher among HIV positive participants. Although SMRs declined with follow-up, the SMR of the oldest age group (45-60) was 4.5 (95% CI 3.0-6.9). There were no significant differences in all-cause mortality rates between participants who were 25 years and older at cohort entry compared to younger participants.

CONCLUSION

Mortality rates remained higher than the general population across all age groups. Screening services that identify a history of injecting drug use may be an opportunity to address risk factors faced by an ageing population of PWID and potentially have implications for future health care planning.

Difficulties in recording mortality resulting from drug abuse

It is considered, according to statements from different sources, that data on the number of deaths in the population of a certain country or region are accurate and correct, but determining causes of death is, for different reasons, often incorrect. There is, therefore,a justified doubt that there are more inaccurately registered drug abuse-related deaths in state registries. Hence, this paper tends to show the most frequent difficulties encountered when recording mortality resulting from drug abuse.

Opiate- and cocaine-related fatal overdoses in Luxembourg from 1985 to 2011: a study on gender differences

BACKGROUND/AIM

We analysed gender differences in national fatal overdose (FOD) cases related to opiates and cocaine use between 1985 and 2011 (n = 340).

METHODS

Cross-examination of national data from law enforcement and drug use surveillance sources and of forensic evidence. Bivariate and logistic regression analysis of male/female differences according to sociodemographics, forensic evidence and drug use trajectories.

RESULTS

The burden of deaths caused by FOD on the general national mortality was higher for men (PMR/100=0.55) compared with women (PMR/100=0.34). Compared with their male peers, women were younger at the time of death (t=3.274; p=0.001) and showed shorter drug use careers (t=2.228; p=0.028). Heroin use was recorded more frequently in first drug offences of female victims (AOR=6.59; 95% CI 2.97-14.63) and according to forensic evidence, psychotropic prescription drugs were detected to a higher degree in females (AOR=2.019; 95% CI 1.065-3.827).

CONCLUSION

The time window between the onset of illicit drug use and its fatal outcome revealed to be shorter for women versus men included in our study. Early intervention in female drug users, routine involvement of first-line healthcare providers and increased attention to use of poly- and psychotropic prescription drugs might contribute to prevent premature drug-related death and reduce gender differences.

Premature mortality in Scottish injecting drug users: a life-history approach

In Scotland, deaths in drug users are known to be higher than in the rest of the UK and most of Europe. Reducing drug-related deaths is currently a national priority for the Scottish Government.  This study aimed to present a description of the life histories of a group of injecting drug users who have recently died, with a view to highlighting areas for further research. The Edinburgh Addiction Cohort study recently carried out 432 follow-up interviews between the years 2005 and 2007. Thirty-three cases who completed this extensive interview detailing early life, education, employment, drug use, opiate substitution treatment, criminal history, mental health problems and overdose have subsequently died, leaving this source of rich information about their lives. The design of the interview used the life grid approach. Information was also compiled from full primary care records and General Register Office death certificates. Early life adversity was apparent for many cases, with a steady progression into early criminal behaviour and drug misuse. Poor adult life outcomes illustrated the lifelong damaging effects of drug injecting. Death occurred significantly earlier than in the general population or those living in deprived communities who did not use drugs. In conclusion, a clearer understanding of the life histories of problem drug users would be advantageous for health-care professionals and policy-makers. More qualitative research studies are needed to highlight areas which might require early intervention and also complement the existing secondary data studies.

Substance abuse and psychiatric co-morbidity as predictors of premature mortality in Swedish drug abusers: a prospective longitudinal study 1970-2006

BACKGROUND

Few longitudinal cohort studies have focused on the impact of substances abused and psychiatric disorders on premature mortality. The aim of the present study was to identify predictors of increased risk of drug related death and non drug related death in substance abusers of opiates, stimulants, cannabis, sedatives/hypnotics, hallucinogens and alcohol over several decades.

METHODS

Follow-up study of a consecutive cohort of 561 substance abusers, admitted to a detoxification unit January 1970 to February 1978 in southern Sweden, and followed up in 2006. Demographic and clinical data, substance diagnoses and three groups of psychiatric diagnoses were identified at first admission. Causes of death were coded according to ICD-10 and classified as drug related deaths or non drug related deaths. To identify the incidence of some probable risk factors of drug related premature death, the data were subjected to a competing risks Cox regression analysis.

RESULTS

Of 561 patients in the cohort, 11 individuals had either emigrated or could not be located, and 204/561 patients (36.4%) were deceased by 2006. The cumulative risk of drug related death increased more in the first 15 years and leveled out later on when non drug related causes of death had a similar incidence. In the final model, male gender, regular use of opiates or barbiturates at first admission, and neurosis were associated with an increased risk of drug related premature death, while cannabis use and psychosis were associated with a decreased risk. Neurosis, mainly depression and/or anxiety disorders, predicted drug related premature death while chronic psychosis and personality disorders did not. Chronic alcohol addiction was associated with increased risk of non drug related death.

CONCLUSIONS

The cohort of drug abusers had an increased risk of premature death to the age of 69. Drug related premature death was predicted by male gender, the use of opiates or barbiturates and depression and anxiety disorders at first admission. The predicted cumulative incidence of drug related death was significantly higher in opiate and barbiturate abusers over the observed period of 37 years, while stimulant abuse did not have any impact. Alcohol contributed to non drug related death.

Causes of premature mortality in Swedish drug abusers: a prospective longitudinal study 1970-2006

AIMS

To evaluate premature mortality and causes of death from young adulthood to middle age in a cohort of drug users followed during almost four decades.

DESIGN

Follow-up study of a consecutive cohort of patients with drug abuse/dependence.

METHODS

A cohort of 561 drug abusers, admitted to a detoxification and short-term rehabilitation unit 1970-1978 was followed to December 31st, 2006. Standardized interviews and hospital records with toxicological analyses were used for demographic data, substance use and psychiatric diagnoses at admission. For Follow-up analyses, autopsy protocols including toxicology tests and death certificates were obtained for assessment of causes of death which were coded according to ICD-10. Age-group standardized mortality ratios were calculated independently for both sexes.

RESULTS

204 persons (36.4%) were deceased by 2006. SMR was 5.94 for the cohort. Compared to an age- and gender-matched population, the risk of premature death was about eighteen times higher between the ages of 20-44 and about five times higher from 45 up to the age of 69. Of 120 (59%) drug-related deaths, 43 were opiate overdoses, and 3 were overdose from amphetamine. A total of 53 (26%) persons died violent deaths: 39 suicides, of which 25 were drug-related, 3 homicides and 12 accidents. The Swedish national causes of death register underestimated drug-related death by 37% and suicide by 85% compared to the results from this study.

CONCLUSIONS

The cohort of drug abusers had an increased risk of premature often drug-related and violent death well into middle age, and to a great extent the drug addicts died from the same drug they had abused when they were first admitted for treatment. The underestimation of drug-related death and suicide in some national death cause registers could be reduced if the doctor routinely records ICD codes when issuing death certificates and autopsy protocols.

A case of heroin overdose reversed by sublingually administered buprenorphine/naloxone (Suboxone)

BACKGROUND

Opioid overdose is a major source of morbidity and mortality in injection drug users in the United States and many other countries.

CASE DESCRIPTION

A case is described in which buprenorphine/naloxone (Suboxone) was administered sublingually to reverse a heroin overdose.

CONCLUSIONS

Sublingually administered buprenorphine/naloxone might be used as a means to reverse opioid overdose.

"The life they save may be mine": diffusion of overdose prevention information from a city sponsored programme

BACKGROUND

Overdose remains the leading cause of death among injection drug users (IDUs) in the United States. Overdose rates are consistently high in Baltimore, MD, USA. The current qualitative study examines diffusion of information and innovation among participants in Staying Alive, an overdose prevention and naloxone distribution programme in Baltimore, MD.

METHODS

In-depth interviews were conducted between June 2004 and August, 2005 with 25 participants who had completed the Staying Alive training and had reported using naloxone to revive an overdose victim. Interviews were taped and transcripts were transcribed verbatim.

RESULTS

Participants were 63% male, 63% African American, and the median age was 41 years old. Participants successfully shared information on overdose prevention and management, particularly the use of naloxone, to their peers and family.

CONCLUSIONS

The current study demonstrates IDUs' interest in and ability to diffuse overdose prevention information and response skills to the injection drug use community. The study underscores the importance of promoting the diffusion of information and skills within overdose prevention programmes.

HIV-infected adults with a CD4 cell count greater than 500 cells/mm3 on long-term combination antiretroviral therapy reach same mortality rates as the general population

OBJECTIVE

To compare mortality rates in combination antiretroviral therapy (cART)-treated HIV-infected adults with mortality in the general population according to the level of CD4 cell count reached and the duration of exposure to cART.

METHODS

HIV-infected adults initiating a protease inhibitor-containing treatment between 1997 and 1999 were selected in the Agence Nationale de Recherches sur le Sida et les hepatites virales (ANRS) APROCO and AQUITAINE cohorts. CD4 cell counts were estimated during follow-up using a 2-phase mixed linear model. Standardized mortality ratios (SMRs) were computed in reference to the 2002 French population rates, overall and for the time period spent with a CD4 count >or=500 cells/mm3. To identify if and when mortality rates reached values of the general population, SMRs were computed successively with truncation at each year of follow-up.

RESULTS

The 2,435 adults (77% men, baseline median age = 36 years, and baseline median CD4 count = 270 cells/mm3) had a median follow-up of 6.8 years. The SMR was 7.0 (95% confidence interval [CI]: 6.2 to 7.8). During the 5,402 person-years spent with a CD4 count >or=500 cells/mm3, the mortality reached the level of the general population after the sixth year after cART initiation (SMR = 0.5, 95% CI: 0.1 to 1.6).

CONCLUSION

Although overall mortality was higher in cART-treated HIV-infected adults, a subgroup with especially good prognosis can be identified, and these characteristics should be targeted for long-term treatment.

The relationship between lifetime abuse and suicidal ideation in a sample of injection drug users

This study examined the relationship between lifetime abuse and suicidal ideation in a sample of 245 injection drug users (IDUs) who attended the Baltimore Needle Exchange Program and received a referral for opiate agonist therapy. Data were obtained from baseline interviews and HIV antibody tests. The sample mean age was 42.2 (SD = 8.1 ); 77% were African American; 69% were male. Overall, 27% reported thoughts of suicide in the last six months, and lifetime emotional, physical and sexual abuse was reported by 17%, 12% and 10%, respectively. In bivariate analyses, recent suicidal ideation was associated with emotional (odds ratio [OR] = 3.2; p = 0.001), physical (OR = 2.5; p = 0.026), and sexual abuse (OR = 5.0; p < 0.001). In multiple logistic regression models controlling for HIV status and Center for Epidemiological Studies Depression (CES-D) score, individuals who experienced emotional abuse were more than twice as likely to report recent suicidal ideation (adjusted odds ratio [AOR] = 2.6; p = 0.011); those who experienced sexual abuse were four times more likely to report suicidal ideation (AOR = 4.0; p = 0.004). These findings suggest that emotional and sexual abuse might be risk factors for suicidality among IDUs and also might suggest that suicide prevention should be an integral part of drug treatment for treatment-seeking IDUs.

Prevalence and correlates of opiate overdose among young injection drug users in a large U.S. city

OBJECTIVES

The current study examines the prevalence and correlates of witnessing and experiencing opiate overdoses among a sample of young, injection drug users (IDUs) and non-injection drug users (NIDUs) in Baltimore, MD.

METHODS

Data were derived from a longitudinal study of 15-30 year old IDUs and NIDUs (N=309) who had initiated heroin, cocaine, and/or crack use within 5 years prior to study enrollment. Chi-square and Wilcoxon rank-sum tests were used in bivariate analyses of demographic and drug use variables with each of the two dependent variables. Multivariate logistic regression models were used to identify correlates of experiencing and witnessing overdose.

RESULTS

Twenty-nine percent of participants reported having ever experienced an opiate overdose and 57% reported having ever witnessed an overdose. Having ever experienced an opiate overdose was independently associated with being White (Adjusted Odds Ratio [AOR]=3.2; 95% Confidence Interval [CI]: 1.6, 6.4) recent homelessness (AOR=2.9; 95%CI: 1.5, 5.7); and length of injection, 5.6-6.9 years versus <5.6 years (AOR=4.0; 95%CI: 1.8-8.9); injecting 7.0-7.9 years versus <5.6 years (AOR=2.5; 95%CI: 1.03-6.1); injecting >8 versus <5.6 years (AOR=4.7; 95%CI: 2.2-10.2). Having witnessed an opiate overdose was independently associated with being White (AOR=2.4; 95%CI: 1.4, 4.1) and injecting >8 years versus <5.6 years (AOR=2.2; 95%CI: 1.2, 4.0).

CONCLUSIONS

This study documents the high prevalence of witnessing and experiencing opiate overdoses among young, newly initiated IDUs and NIDUs. The results could inform the growing number of overdose prevention efforts throughout the U.S.

Using cohort studies to estimate mortality among injecting drug users that is not attributable to AIDS

BACKGROUND

Injecting drug use (IDU) and associated mortality appear to be increasing in many parts of the world. IDU is an important factor in HIV transmission. In estimating AIDS mortality attributable to IDU, it is important to take account of premature mortality rates from other causes to ensure that AIDS related mortality among injecting drug users (IDUs) is not overestimated. The current review provides estimates of the excess non-AIDS mortality among IDUs.

METHOD

Searches were conducted with Medline, PsycINFO, and the Web of Science. The authors also searched reference lists of identified papers and an earlier literature review by English et al (1995). Crude mortality rates (CMRs) were derived from data on the number of deaths, period of follow up, and number of participants. In estimating the all-cause mortality, two rates were calculated: one that included all cohort studies identified in the search, and one that only included studies that reported on AIDS deaths in their cohort. This provided lower and upper mortality rates, respectively.

RESULTS

The current paper derived weighted mortality rates based upon cohort studies that included 179 885 participants, 1,219,422 person-years of observation, and 16,593 deaths. The weighted crude AIDS mortality rate from studies that reported AIDS deaths was approximately 0.78% per annum. The median estimated non-AIDS mortality rate was 1.08% per annum.

CONCLUSIONS

Illicit drug users have a greatly increased risk of premature death and mortality due to AIDS forms a significant part of that increased risk; it is, however, only part of that risk. Future work needs to examine mortality rates among IDUs in developing countries, and collect data on the relation between HIV and increased mortality due to all causes among this group.

Concurrent use of alcohol and cocaine: differences in patterns of use and problems among users of crack cocaine and cocaine powder

AIM

To investigate differences in alcohol and drug consumption behaviours and related problems among users of cocaine powder versus crack cocaine.

METHODS

The sample of concurrent users of alcohol and cocaine (n = 102) was recruited from clinical and community (non-clinical) settings in London. Those recruited in the community were contacted by means of snowball sampling methods. Data were collected by means of face-to-face structured interviews.

RESULTS

Heavy drinking was common. There were differences in alcohol consumption between users of cocaine powder and crack cocaine. Cocaine powder users reported more frequent heavy drinking than crack users. Heavy drinking often involved drinking excessive amounts over prolonged periods. Crack cocaine users reported more serious problems associated with cocaine, other illicit drugs, psychological and physical health problems, and acquisitive crime.

CONCLUSIONS

Frequent heavy drinking represents a serious risk to the health of many cocaine users. The differences in alcohol consumption patterns confirm the importance of distinguishing between use of cocaine powder and crack cocaine. Few of the sample had received treatment for cocaine or alcohol problems. Healthcare professionals working in primary care or accident and emergency settings may need to be trained to detect, assess, and respond to concurrent alcohol and cocaine problems.

Prevalence and correlates of suicidal ideation among young injection vs. noninjection drug users

The objective of this study was to identify correlates of suicidal ideation and to examine the hypothesis that injection drug users (IDUs) were more likely to report suicidal ideation than noninjection drug users (NIDUs). Participants included IDUs (n = 244) and NIDUs (n = 73) from Baltimore, Maryland, aged 15-30 who began snorting or smoking heroin or cocaine/crack (NIDUs) or injecting drugs (IDUs) within the past 5 years who were recruited between August 2000 and March 2002. Among the 317 participants, 42% were female, 59% were white, and median age was 24. The prevalence of suicidal ideation was 27%. IDUs were more likely to report suicidal ideation than NIDUs (31% vs. 14%, p = 0.003). Adjusting for age, gender, and race, IDUs were 2.4 times more likely than NIDUs to report suicidal ideation [95% Confidence Interval (CI): 1.1-5.2]. However, on further adjustment for homelessness, depressive symptoms, and gay/lesbian/bisexual identity, IDU status was no longer independently associated with suicidal ideation. These results suggest that factors associated with injection drug users' lifestyles and mental health status may account for the higher prevalence of suicidal ideation in IDUs vs. NIDUs. Further study into these associations is warranted in identifying avenues for suicide prevention among these populations.

Modeling the current and future disease burden of hepatitis C among injection drug users in Scotland

Quantitative estimates of the current and future burden of hepatitis C virus (HCV) disease are required to plan a public health response to the HCV epidemic with regard to both prevention and treatment. A forward projection model was used to estimate the numbers of both current and former injecting drug users (IDUs) who acquired HCV and progressed to moderate and severe disease in Glasgow and Scotland during 1960-2030. The model was designed to synthesize information on the incidence and cessation of injecting drug use, the incidence of HCV infection among IDUs, the rate of HCV disease progression, and the annual number of IDUs developing HCV-related decompensated cirrhosis. During 2003, a total of 17,400 and 42,900 HCV-infected IDUs were estimated in Glasgow and Scotland, respectively; this compares with approximately 5,000 and 13,900 diagnosed, respectively, and 13,200 and 32,200 with chronic HCV, respectively. The number of IDUs developing HCV-related decompensated cirrhosis in Scotland is estimated to double between 2000 and 2020. As many as 16% and 27% of former IDUs in 2005 aged 30-39 and 40-49 years, respectively, were estimated to have moderate disease, which highlights the potential benefit of targeting HCV testing at former IDUs who belong to these age groups. In conclusion, the identification and treatment of a larger proportion of former IDUs with HCV disease and education about the importance of minimal alcohol consumption are needed to help achieve a greater impact on the future morbidity and mortality of this disease.

Blood morphine levels in naltrexone-exposed compared to non-naltrexone-exposed fatal heroin overdoses

The aim of this study was to investigate the association between prior exposure to naltrexone and increased risk of fatal heroin overdose using a review of toxicology reports for heroin-related fatalities between July 1997 to August 1999 for two groups: those treated with oral naltrexone and those who were not treated. Additional information for the oral naltrexone group was obtained from clinic files. Naltrexone-treated deaths were identified from the patient database at the Australian Medical Procedures Research Foundation (AMPRF), Perth, Western Australia (WA) through the Western Australian Department of Health, Data Linkage Project. Non-treated cases were identified from the database at the Forensic Science Laboratory, State Chemistry Centre (WA). We identified and investigated blood morphine concentrations following 21 fatal heroin overdoses with prior exposure to naltrexone and in 71 non-naltrexone-exposed cases over the same time period. The proportion of deaths where heroin use was a major contributing factor was little different in the non-naltrexone compared to the naltrexone-exposed group. Furthermore, in 'acute opiate toxicity' deaths, blood morphine levels were lower in non-naltrexone-exposed compared with naltrexone-exposed cases. Although there was a higher number of deaths designated as rapid (i.e. occurring within 20 minutes) in the naltrexone-exposed (89%) compared with the non-exposed group (72%) this was not statistically significant. Other drug use in relation to heroin-related fatalities is discussed. Findings do not support the hypothesis that prior exposure to naltrexone increases sensitivity to heroin toxicity.

The role of methadone in drug-related deaths in the west of Scotland

AIMS

To determine the incidence of methadone as either the principal cause of death or as a contributing factor in drug related deaths in the Strathclyde Police region of Scotland and to assess the impact of supervised consumption of methadone on the number of deaths that occurred within each health board area within this region.

DESIGN

Retrospective analysis of records held within the Department of Forensic Medicine and Science based at the University of Glasgow over the 11-year period 1991-2001.

SETTING

The Strathclyde Police region of Scotland (population approximately 2.25 million).

FINDINGS

In 1991, there was one death recorded which was attributable to methadone. Following the introduction of the methadone maintenance programme (MMP) in Glasgow during 1994, there was a 100% increase in these deaths compared to the previous year, a trend which continued over the subsequent 2 years. Following a confidential enquiry into these deaths and a greater compliance from pharmacies supervising methadone consumption, deaths involving methadone had decreased by 48% in 1997. This was particularly evident in the Greater Glasgow Health Board Area, where methadone prescribing has continued to rise annually. However, some difficulties still exist. Multiple take home doses are sometimes prescribed when a pharmacy is closed, which may lead to inadvertent overdose or facilitate diversion of legitimate supplies. In addition, continued use of heroin was found in approximately one-fifth of MMP patients, suggesting possible underdosing.

CONCLUSIONS

A growing prevalence of heroin misuse has resulted in an increase in the number of individuals entering the MMP. Despite a continuing increase in the amount of methadone prescribed, methadone deaths in Strathclyde have decreased since 1996 due possibly to changes in both prescribing and clinical care. With efficient management to establish that the patient is complying with the guidelines of the programme and has stopped heroin misuse, methadone can be a safe drug for substitution therapy.

The impact of hepatitis C virus coinfection on HIV progression before and after highly active antiretroviral therapy

To compare the impact of hepatitis C virus (HCV) coinfection on progression of HIV infection in the eras before and after the introduction of highly active antiretroviral therapy (HAART), the authors conducted a retrospective cohort study. One hundred twenty-five HCV+ patients and 1076 HCV- patients were studied; 83% of HCV+ patients were injection drug users. HCV+ subjects experienced no clear benefit from HAART. The adjusted hazard ratios (HRs) of opportunistic infection, death, and hospitalization were 0.74 (95% CI: 0.31-1.78), 1.78 (95% CI: 0.59-5.37), and 2.1 (95% CI: 0.90-4.90), respectively, comparing the post-HAART era with the pre-HAART era. In contrast, HCV- subjects experienced rate reductions for all outcomes. Comparable HRs for opportunistic infection, death, and hospitalization were 0.49 (95% CI: 0.37-0.64), 0.28 (95% CI: 0.19-0.41), and 0.51 (95% CI: 0.38-0.67), respectively. HCV+ subjects remained at increased risk for death and hospitalization post-HAART even after additional adjustment for antiretroviral use and time-updated CD4 cell and viral load measures. Deaths and hospitalizations in HCV+ patients were primarily for non-AIDS-defining infections and complications of injection drug use. HCV coinfection and comorbidity associated with injection drug use are preventing the realization of substantial health benefits associated with HAART.

Heroin overdose: research and evidence-based intervention

Drug overdose is a major cause of premature death and morbidity among heroin users. This article examines recent research into heroin overdose to inform interventions that will reduce the rate of overdose death. The demographic characteristics of overdose cases are discussed, including factors associated with overdose: polydrug use, drug purity, drug tolerance, routes of administration, and suicide. Responses by heroin users at overdoses are also examined. Potential interventions to reduce the rate of overdose and overdose-related morbidity are examined in light of the emerging data in this field.

Beyond risk theory: suicidal behavior in its social and epidemiological context

The effect of exposure to risk factors for suicidal behavior varies from place to place and from period to period. This may be due to contextual influences, which arise if individuals' suicide risk depends not only on their personal exposure to risk or protective factors, but also on how these are distributed in their social, cultural, economic, or even physical environments. There has been relatively little explicit attention in suicide research for such contextual influences even though they are an important component of the cross-level bias, which can arise when aggregate level associations are assumed to also apply in individuals and vice versa. Contextual effects are conceptually related to the issues of social selection vs. causation, population density, and network effects. Because of a lack of prospective multilevel research, it is unclear exactly which mechanisms underlie the phenomenon that the distribution of risk factors in an individual's context may affect their suicide risk above and beyond their personal exposure. A number of mechanisms, like deviancy amplification, formalization of restraints, and buffering effects of social support are proposed. Contextual effects may result in a concentration of suicide risk in persons when the risk factors they are exposed to become rare--whether spontaneously or through focused prevention. This has important but mostly overlooked implications for population-based prevention strategies.

Concomitant drugs of misuse and drug using behaviours associated with fatal opiate-related poisonings in Sheffield, UK, 1997-2000

AIMS

To examine the degree of involvement of concomitant drugs of misuse and other previously identified behavioural risk factors in acute accidental opiate-related poisoning fatalities in Sheffield, 1997-2000.

DESIGN

Retrospective analysis of coroners' records.

SETTING

Sheffield, UK.

PARTICIPANTS

All those who died from an acute accidental opiate-related poisoning in Sheffield between 1 January 1997 and 31 December 2000.

MEASUREMENTS

Coronial data were collated under the headings: demographic characteristics, circumstances of death and toxicological findings.

FINDINGS

Ninety-four deaths occurred over the study period. The majority of cases were regular users of illicit drugs. Approximately 20% of deaths were preceded by a period of abstinence from drug use, with imprisonment and hospitalization as the most common reasons. Sixty-one per cent of cases had concomitant drugs of misuse detected from toxicology most commonly benzodiazepines and/or alcohol. These were, however, found in relatively small concentrations and opiate blood concentrations were no lower in deaths where multiple substances were involved. Despite evidence to suggest that smoking is the preferred route of heroin administration in this region, the vast majority of cases involved injecting.

CONCLUSIONS

Administration of an opiate via intravenous injection was the most consistent factor associated with these deaths over the period of this study. Co-administration of other central nervous system depressants, at least in lower quantities appear to be a feature rather than a risk factor per se in such fatalities.

Suicide among heroin users: rates, risk factors and methods

The current paper examines critically the literature on suicide rates, suicide risk factors and methods employed for suicide among heroin users, and compares these to those of the general population. Heroin users have a death rate 13 times that of their peers, and deaths among heroin users attributed to suicide range from 3-35%. Overall, heroin users are 14 times more likely than peers to die from suicide. The prevalence of attempted suicide is also many orders of magnitude greater than that of community samples. The major general population risk factors for suicide also apply to heroin users (gender, psychopathology, family dysfunction and social isolation). Heroin users, however, have extremely wide exposure to these factors. They also carry additional risks specifically associated with heroin and other drug use. Drugs as a method of suicide play a larger role in suicide among heroin users than in the general population. Heroin, however, appears to play a relatively small role in suicide among this group. Overall, suicide is a major clinical issue among heroin users. It is concluded that suicide is a major problem that treatment agencies face, and which requires targeted intervention if the rates of suicide among this group are to decline.

The relationship between notifications to the Home Office Addicts Index and deaths of notified addicts

Aims This paper examines (a) the relationship between notifications to the Home Office Addicts Index and deaths of notified addicts, and (b) the survival rates of such addicts.Design and participants Data came from the Home Office Addicts Index covering (a) notifications of opiate and cocaine addicts seeking treatment in the UK between 1966 and 1996, and (b) deaths of notified addicts between 1967 and 1996.Measurement Date of first notification; date of death; numbers of notifications in different times.Findings The proportion of addicts dying compared to the number of new notifications 20 years earlier rose from 2 to 7 in 10 between 1988 and 1993. There is constancy in the relationship between numbers of death and new notifications for up to 10 years before death. The proportion of the cumulative notified population dying between 1985 and 1993 remained consistent at 0.6% or 0.7%. The average length of time between first notification and death increased by six months between 1985‐90 and 1991‐96. Whilst the absolute number of deaths rose between 1984 and 1993, the proportion of newly notified addicts dying each year fell from 2.1% to 0.5%.Conclusions An increase in notifications was directly associated with a proportionate increase in addict deaths. One can expect the number of serious‐end drug users who die to increase with time, especially given the continuing role played by opiates ‐ chiefly heroin and methadone ‐ and increasingly cocaine in drug‐related deaths. At the same time, one can expect such individuals to survive for longer periods than did addicts in past decades.

A prospective study of mortality among drug misusers during a 4-year period after seeking treatment

AIMS

The opportunity to study deaths as they occur within the framework of a prospective cohort study is relatively uncommon. This study investigates deaths among drug misusers over a 4-year period, with specific attention to the circumstances and causes of death, and risk factors for mortality. The study also critically examines the recording of drug-related deaths.

DESIGN, SETTING, PARTICIPANTS

Prospective cohort study of 1075 drug misusers recruited to 54 treatment programmes during 1995.

MEASUREMENTS

Data derived from interviews conducted with clients at intake, death certificates and post-mortem examinations.

FINDINGS

The annual mortality rate was 1.2%, about six times higher than that for a general, age-matched population. Fourteen per cent of the deaths were due to self-inflicted injuries, accidents or violence and 18%, were due to medical causes. The majority of deaths (68%) were associated with drug overdoses. Opiates were the drugs most commonly detected during post-mortem examinations. In the majority of cases, more than one drug was detected. Polydrug use and, specifically, heavy drinking, and use of benzodiazepines and amphetamines, were identified as risk factors for mortality. Anxiety and homelessness were also predictive of increased mortality.

CONCLUSIONS

We suggest that drug misusers and those working with drug misusers need to be more alert to the risks of polydrug use, including the combined use of alcohol with illicit drugs. The study revealed inconsistencies in the recording of drug-related deaths on death certificates. The routine recording of all substances detected during toxicological examination would improve the accuracy of death certification.

Predictors and prevention of nonfatal overdose among street-recruited injection heroin users in the San Francisco Bay Area, 1998-1999

OBJECTIVES

This study sought to determine prevalence of and risk factors for nonfatal recent overdose among street-recruited injection heroin users.

METHODS

From August 1998 through July 1999, 1427 heroin injectors were recruited from 6 inner-city neighborhoods in the San Francisco Bay Area, Calif, and interviewed. Factors hypothesized to be associated with recent overdose were analyzed with logistic regression.

RESULTS

Of the 1427 participants, 684 (48%) had had an overdose, 466 (33%) had experienced 2 or more overdose events, and 182 (13%) had had a recent overdose. In multiple logistic regression, being younger (adjusted odds ratio [OR] for each year of increasing age = 0.95; 95% confidence interval [CI] = 0.94, 0.97), having been arrested 3 or more times in the past year (adjusted OR = 2.50; 95% CI = 1.61, 3.87), drinking 4 or more alcoholic drinks per day (adjusted OR = 2.05; 95% CI = 1.37, 3.05), and having participated in methadone detoxification during the past year (adjusted OR = 1.47; 95% CI = 1.03, 2.09) were independently associated with recent overdose. Being homeless; identifying as gay, lesbian, bisexual, or transgender; having spent 5 or more years in prison or jail; and having engaged in sex work also were associated with recent overdose.

CONCLUSIONS

Targeted interventions that decrease risk for overdose are urgently needed.

Mortality of opiate users in Vienna, Austria

The purpose of this study was to investigate whether there are differences in overall and cause-specific mortality rates of opiate users in maintenance treatment and of opiate users not in any drug treatment program in Vienna, Austria. A cohort of opiate-users enrolled in maintenance treatment in Vienna and a cohort of individuals involved in opiate-related emergencies from 1995 to 1997 were retrospectively analyzed. The standardized mortality rate of opiate-users enrolled in maintenance treatment was 12.1 and that of individuals involved in opiate-related emergencies was 48.8. Excess mortality was found for all categories for both groups. In the face of the extremely high excess mortality of opiate users involved in opiate-related emergencies, measures have to be taken to get these individuals in drug treatment programs as soon as possible.

Trends in young adult mortality in three European cities: Barcelona, Bologna and Munich, 1986-1995

OBJECTIVE

In recent decades, in most European countries young adult mortality has risen, or at best has remained stable. The aim of this study was to describe trends in mortality attributable to the principal causes of death: AIDS, drug overdose, suicide and motor vehicle traffic accidents, among adults aged between 15 and 34 years in three European cities (Barcelona, Bologna and Munich), over the period 1986 to 1995.

METHODS

The population studied consisted of all deaths that occurred between 1986 and 1995 among residents of Barcelona, Bologna and Munich aged from 15 to 34 years. Information about deaths was obtained from mortality registers. The study variables were sex, age, the underlying cause of death and year of death. Causes of death studied were: drug overdose, AIDS, suicide and motor vehicle traffic accidents. Age standardised mortality rates (direct adjustment) were obtained in all three cities for the age range 15-34. To investigate trends in mortality over the study period Poisson regression models were fitted, obtaining the average relative risk (RR) associated with a one year increment.

RESULTS

Young adult mortality increased among men in Barcelona and Bologna (RR per year: 1.04, 95% confidence intervals (95%CI): 1.03, 1.06 in Barcelona and RR:1.03, 95%CI:1.01, 1.06 in Bologna) and among women in Barcelona (RR:1.02, 95%CI: 1.01, 1.04), with a change in the pattern of the main causes of death attributable to the increase in AIDS and drug overdose mortality. In Munich, the pattern did not change as much, suicides being the main cause of death during the 10 years studied, although they have been decreasing since 1988 (RR:0.92, 95%CI:0.88, 0.96 for men and 0.81, 95%CI: 0.75-0.87 for women).

CONCLUSION

The increase in AIDS mortality observed in the three European cities in the mid-80s and mid-90s has yielded substantial changes in the pattern of the main causes of death at young ages in Barcelona and Bologna. Munich presented a more stable pattern, with suicide as the main cause of death.

Predictors of accidental fatal drug overdose among a cohort of injection drug users

OBJECTIVES

This study evaluated factors associated with accidental fatal drug overdose among a cohort of injection drug users (IDUs).

METHODS

In a prospective cohort study of 2849 IDUs in King County, Washington, deaths were identified by electronically merging subject identifiers with death certificate records. Univariate and multivariate Cox regression analyses were performed to identify predictors of overdose mortality.

RESULTS

Thirty-two overdoses were observed. Independent predictors of overdose mortality were bisexual sexual orientation (relative risk [RR] = 4.86; 95% confidence interval [CI] = 2.30, 13.2), homelessness (RR = 2.30; 95% CI = 1.06, 5.01), infrequent injection of speedballs (RR = 5.36; 95% CI = 1.58, 18.1), daily use of powdered cocaine (RR = 4.84; 95% CI = 1.13, 20.8), and daily use of poppers (RR = 22.0; 95% CI = 1.74, 278).

CONCLUSIONS

Sexual orientation, homelessness, and drug use identify IDUs who may benefit from targeted interventions.

Mortality 5 Years After Detoxification and Counseling as Indicated by Psychometric Tests

Residential detoxification of substance abusers, using medication to alleviate withdrawal symptoms, often fails to ensure further abstention and predict which clients have the greatest risk of morbidity after detoxification. Prolonging the detoxification period with a counseling period has been shown to enhance compliance to counseling. Sixty-one (61) substance abusers (mean age: 31.3 years; 22 women) with a mean length of abuse of 16 years in 1993-1994 were tested using two psychometric tests and then followed up in 1999 according to mortality. Mean value on Antonovsky's Sense of Coherence (SOC) scale was 2.98 and on Hopkins Symptom Checklist (HSCL-24) was 2.06, indicating postdetoxification coping problems and distress. Thirteen (13) abusers died during follow-up. Cox regression of mortality showed increased risk in men, and also an increased risk of dying in the observation period with lower SOC score (p <.01), but not with increasing HSCL-24 score. Logistic regression indicated a 3.6 times higher risk of dying in the observation period if the SOC score was 1 point lower (on a scale range from 1 to 5). An increased mortality in drug addicts leaving the facility with an SOC value below 3.00 after a 4-week detoxification and counseling stay is thus strongly supported by the data. Antonovsky's SOC scale thus seems to be a good indicator of future mortality.

Peer-initiated overdose resuscitation: fellow drug users could be mobilised to implement resuscitation

Research interviews about overdose experiences were conducted with 115 patients attending a methadone maintenance clinic in south London, UK. While almost half (49.6%) reported having experienced overdose personally (on an average of four occasions each), almost all (97.4%) reported that they had witnessed overdoses (on an average of six occasions each). This represents a total of 706 overdoses witnessed, of which 106 had resulted in fatalities. The vast majority of patients (86/97) reported that they had taken actions when they had witnessed overdoses with those acting taking an average of nearly threee different actions on the last occasion on which they had seen someone overdosing. Most respondents reported that they would be willing to act, even if they did not know the overdose victim personally and that they had not been deterred from acting by the previous response from the emergency services. Fear of punishment was not a strong deterrent from acting certainly not for this sample, with many participants also expressing an interest in expanding their repertoire of overdose interventions, for example through training in resuscitation techniques and by keeping naloxone at home for use in overdose emergency.

Experience of heroin overdose among drug users attending general practice

BACKGROUND

Heroin overdose is responsible for significant mortality. It has not previously been highlighted as an important prevention or care issue for general practitioners (GPs) involved in the management of drug misuse.

AIMS

To examine the prevalence and experience of heroin overdose in a population of drug users attending a general practice.

METHOD

A questionnaire-based interview of drug users attending a general practice in Dublin, Ireland.

RESULTS

Twenty-four (73% of estimated total) drug users were interviewed. Although 17 (71%) were on recognised methadone treatment programmes, 10 (42%) were still injecting heroin. A total of 23 (96%) had witnessed an overdose, with 10 (42%) having been victims of overdose themselves. Twenty-two (92%) knew a victim of fatal overdose, with four (17%) having been present at a fatal overdose. The interviews revealed high levels of activity associated with overdose and poor use of preventive measures.

CONCLUSION

The issue of prevention and management of overdose should become a priority for GPs caring for opiate-dependent patients.

[Discrepancies in the number of deaths from an acute reaction to psychoactive substances recorded in Spain]

OBJECTIVE

The National Mortality Register (NMR) is used to monitor and prioritize health problems, but it may underestimate deaths from external causes, among which are deaths from acute reaction to psychoactive substances (ARPS). To evaluate the discrepancies between death from ARPS collected in the NMR and those collected in the specific register of the State Information System for Drug Addiction (SEIT).

METHODS

We evaluated the discrepancy between ARPS deaths in 15-49 years olds registered in the NMR (code E850-858) and deaths from acute reaction to opium and cocaine in the SEIT, in Barcelona, Bilbao, Madrid, Sevilla, Valencia and Zaragoza, between 1984-93.

RESULTS

3,491 ARPS deaths were registered in SEIT, 1,285 in NMR. Varying degrees of discrepancies appeared between the two registers in all six cities. The NMR in Madrid showed 92% fewer deaths than the SEIT, while in Barcelona the NMR figure was 23% lower. Between 1984 and 1993 the differences between registers in all cities, except Madrid and Seville, narrowed (p < 0.01).

CONCLUSIONS

Even though detection of ARPS deaths in the NMR has been improving, it still underestimates the real situation, and is therefore not a useful tool in the evaluation of temporal-spatial variations. To improve detection of ARPS deaths (and those from other external causes) a systematic linkage with data from the coroners' registers must be done.

Trends in fatal substance overdose in eastern Saudi Arabia

Two hundred and forty-nine deaths owing to substance overdose were reported to the Medico-Legal Centre, Dammam, Saudi Arabia in the 8 year period from 1990 to 1997. All cases were subject to a full forensic autopsy with toxicological and histological studies. The overall male:female ratio was 7.9:1 and males predominated in all age groups. Saudis outnumbered other nationalities and accounted for 191 (77%) of the cases. Four main categories of overdose fatalities were identified: opiates, prescribed medication, alcohol and carbon monoxide. Opiates accounted for 116 (47%) of all overdose deaths, although such fatal overdoses have been decreasing since 1993. Medically-prescribed drugs accounted for 50 (20%) of the fatalities (21 deaths from antidepressants, 19 from tranquillisers, five from hypnotics, three from paracetamol and two from amphetamines). Ethyl alcohol accounted for 27 deaths (11%) and carbon monoxide for 26 deaths (10.5%). This study shows a sharp fall in overdose fatalities in eastern Saudi Arabia during the last 5 years, which probably reflects the influence of a combined policy of strict legislations against drug trafficking and tight control over prescription of drugs.

Pre-AIDS mortality in HIV-infected individuals in England, Wales and Northern Ireland, 1982-1996

OBJECTIVE

To assess pre-AIDS mortality in HIV-infected patients in England, Wales and Northern Ireland during the period 1982-1996.

DESIGN

Surveillance data on pre-AIDS and AIDS deaths reported to the PHLS-AIDS Centre were analysed.

METHODS

Pre-AIDS mortality was estimated as the proportion of pre-AIDS deaths among all deaths in HIV-infected people. Trends over time in the number of pre-AIDS and AIDS deaths were compared using Poisson regression with logarithmic link. Causes of pre-AIDS deaths were recorded. Comparisons were made between the pre-AIDS and the AIDS death groups by logistic regression for: age, location of residence at death, year of death and risk exposure.

RESULTS

Four-hundred and sixty-eight pre-AIDS deaths and 8574 AIDS deaths were identified. Pre-AIDS mortality accounted for 5.0% of HIV-related deaths. Trends over time in the number of pre-AIDS and AIDS deaths were not significantly different (P=0.11). Reported causes of pre-AIDS death included pneumonia (92), liver disease (62), septicaemia (51), malignancies (49), suicide (45), cardiopulmonary causes (46), haemorrhage (42), overdose (24) and accidental causes (24). Factors positively associated with pre-AIDS death were injecting drug use, haemophilia and blood transfusion, residence outside the Thames regions, and death at an older age.

CONCLUSIONS

Pre-AIDS mortality represents a substantial proportion of HIV mortality, particularly where injecting drug use is a frequent route of HIV transmission.

Drug Misuse in Scotland: Policy, Prevalence, and Public Health

The paper outlines the nature and extent of illegal drug use in Scotland. The paper provides a detailed discussion of the impact of HIV among injecting drug users in Scotland. It is shown that although HIV remains a major public health concern within parts of Scotland, most notably in Edinburgh and Dundee, HIV infection remains low elsewhere within Scotland. Although concern in relation to HIV has receded in light of the continuing low prevalence, there has been growing concern over the marked increase in drug-related deaths among drug users within parts of Scotland. Within the policy sphere greater attention is now being given to topic of drug prevention and the impact of drug use on community well being.