Challenges to Studying Illicit Drug Users

Establishing a model of peer support for pregnant persons with a substance use disorder as an innovative approach for engaging participants in the healthy brain and child development study

The HEALthy Brain and Child Development (HBCD) Study, a multi-site prospective longitudinal cohort study, will examine human brain, cognitive, behavioral, social, and emotional development beginning prenatally and planned through early childhood. The goal is to recruit over 7000 caregiver-child dyads across the United States, with 25 % of the study population comprising children exposed in utero to substances to better understanding the effects of prenatal substance exposure on fetal and child development. However, barriers of mistrust for pregnant persons who are substance involved can create challenges to recruiting and retaining this population. The HBCD Study is utilizing a novel approach in research, the inclusion of support professionals (i.e. study navigators) as research team members to boost recruitment, engagement, and retention in this population and other marginalized and underrepresented groups. This article describes the conceptualization and early implementation of a support model utilizing certified peer support specialists, and the evolution to a broader study navigator model (SNM). Core skills, training, and support necessary for integrating such support professionals onto the research team are outlined. A reflection on challenges and next steps describes how the early implementation of the SNM encourages a paradigm shift in longitudinal research that humanizes and centers the participants.

Methamphetamine detection using portable capillary electrophoresis coupled with a swab-based extraction device

Methamphetamine (MA) is one of the most virulent illicit drugs that can be synthesized from household materials leading to its prevalent trafficking and local manufacturing in clandestine drug laboratories (clan labs). The significant problems of tracing MA in clan labs and monitoring drug abusers lie in the lag time between sample collection and analysis and the number of tests done. Capillary electrophoresis (CE) is a rapid separation technique amenable to miniaturization and field testing. Herein, we developed a simple transient isotachophoretic (tITP)-CE method to detect MA and its precursor pseudoephedrine (PSE) in clan labs and non-invasive biological fluids. The method was implemented on the ETD-100, a commercial fully automated portable CE instrument with an integrated swab-based extraction system. Within 2 min of insertion of the swab, MA and PSE were automatically extracted with a leading electrolyte (LE) and then separated on covalently modified capillaries. The ETD-100 showed a limit of detection (LOD) and quantification (LOQ) of MA 0.02 and 0.05 μg/swab and 0.02 and 0.06 μg/swab of PSE, with an enhancement factor of 118 and 328, respectively, when compared to a normal non-tITP injection. The intra and inter-day relative standard deviation in terms of migration time were in the range of 0.75-1.93 % for both MA and PSE and were 2.0-2.4 % for both MA and PSE peak height. The method was demonstrated with the detection of spiked MA and PSE on different household materials as well as in non-invasive biological fluids with a recovery above 60 %.

Is there still hope for the prophylactic hepatitis C vaccine? A review of different approaches

Despite remarkable progress in the treatment of hepatitis C virus (HCV) infection, it remains a significant global health burden, necessitating the development of an effective prophylactic vaccine. This review paper presents the current landscape of HCV vaccine candidates and approaches, including more traditional, based on inactivated virus, and more modern, such as subunit protein, vectored, based on nucleic acids (DNA and mRNA) and virus-like particles. The concept of the HCV vaccine is first put in the context of viral genetic diversity and adaptive responses to HCV infection, an understanding of which is crucial in guiding the development of an effective vaccine against such a complex virus. Because ethical dimensions are also significant in vaccine research, development, and potential deployment, we also address them in this paper. The road to a safe and effective vaccine to prevent HCV infection remains bumpy due to the genetic variation of HCV and its ability to evade immune responses. The progress in cell-culture systems allowed for the production of an inactivated HCV vaccine candidate, which can induce cross-neutralizing antibodies in vitro, but whether this could prevent infection in humans is unknown. Subunit protein vaccine candidates that entered clinical trials elicited HCV-specific humoral and cellular responses, though it remains to be shown whether they translate into effective prevention of HCV infection or progression of infection to a chronic state. Such responses were also induced by a clinically tested vector-based vaccine candidate, which decreased the viral HCV load but did not prevent chronic HCV infection. These disappointments were not readily predicted from preclinical animal studies. The vaccine platforms employing virus-like particles, DNA, and mRNA provide opportunities for the HCV vaccine, but their potential in this context has yet to be shown. Ensuring the designed vaccine is based on conserved epitope(s) and elicits broadly neutralizing immune responses is also essential. Given failures in developing a prophylactic HCV vaccine, it is crucial to continue supporting national strategies, including funding for screening and treatment programs. However, these actions are likely insufficient to permanently control the HCV burden, encouraging further mobilization of significant resources for HCV vaccine research as a missing element in the elimination of viral hepatitis as a global public health.

Feasibility of using real-world data to emulate substance use disorder clinical trials: a cross-sectional study

INTRODUCTION

Real-world evidence is receiving considerable attention as a way to evaluate the efficacy and safety of medical products for substance use disorders (SUDs). However, the feasibility of using real-world data (RWD) to emulate clinical trials evaluating treatments for SUDs is uncertain. The aim of this study is to identify the number of clinical trials evaluating treatments for SUDs with reported results that could be feasibly emulated using observational data from contemporary insurance claims and/or electronic health record (EHR) data.

METHODS

In this cross-sectional study, all phase 2-4 trials evaluating treatments for SUDs registered on ClinicalTrials.gov with reported results were identified. Each trial was evaluated to determine if the indications, interventions, at least 80% of eligibility criteria, comparators, and primary end points could be ascertained using contemporarily available administrative claims and/or structured EHR data.

RESULTS

There were 272 SUD trials on ClinicalTrials.gov with reported results. Of these, when examining feasibility using contemporarily available administrative claims and/or structured EHR data, 262 (96.3%) had indications that were ascertainable; 194 (71.3%) had interventions that were ascertainable; 21 (7.7%) had at least 80% of eligibility criteria that were ascertainable; 17 (6.3%) had active comparators that were ascertainable; and 61 (22.4%) had primary end points that were ascertainable. In total, there were no trials for which all 5 characteristics were ascertainable using contemporarily available administrative claims and/or structured EHR data. When considering placebo comparators as ascertainable, there were 6 (2.2%) trials that had all 5 key characteristics classified as ascertainable from contemporarily available administrative claims and/or structured EHR data.

CONCLUSIONS

No trials evaluating treatments for SUDs could be feasibly emulated using contemporarily available RWD, demonstrating a need for an increase in the resolution of data capture within a public health system to facilitate trial emulation.

Suicidal thoughts and behaviors among untreated illicit substance users: a population-based study

OBJECTIVES

Research regarding the contribution of specific psychoactive substances to suicidality has yielded equivocal results. The present study examined the prevalence and factors associated with suicidal thoughts and behaviors among a population-based sample of untreated illicit substance users.

METHODS

A total of 616 illicit substance users who were recruited from high-risk areas of Shiraz using snowball sampling participated in the study. Eligible participants were individuals aged 18 years and older who regularly used one illicit psychoactive substance (e.g., opioids, heroin, cannabinoids, stimulants, hallucinogens) for at least one year and who had received no treatment for their drug use during the past year. Data were collected regarding socio-demographic characteristics, mental history, and substance use habits. Data regarding suicidal thoughts and behaviors were assessed using the Beck Suicidal Ideation Scale (BSIS) and self-reports of previous suicide attempts. Multiple logistic regression analysis was used to identify independent variables associated with suicidality.

RESULTS

Among the participants, 23.6% reported having had suicidal thoughts during the past week and 6.7% reported having attempted suicide during the past year. Methamphetamine was reported as the primary substance of use among approximately half of the participants who attempted suicide during past year (49.2%). Multiple logistic regression analysis showed that current suicidal thoughts were independently associated with having no job, a history of mental health condition, previous suicidal attempts, concurrent use of more than one substance, and using methamphetamine and heroin as the primary substances. Suicidal thoughts were not associated with increased odds of regular opium and cannabis use.

CONCLUSION

Both methamphetamine and heroin use are significantly associated with current suicidal thoughts. Evaluation of the risk of suicidality by physicians and mental health care professionals in both community and outpatient settings would be especially appropriate among those individuals using these psychoactive substances.

Modelling the progression of illicit substance use patterns from real-world evidence

AIMS

To investigate an innovative pharmacometrics approach that addresses the challenges of using real-world evidence to model the progression of illicit substance use.

METHODS

The modelling strategy analysed real-world data from the National Longitudinal Study of Adolescent to Adult Health (AddHealth) survey using survival analyses and differential equations. Respondents were categorized into drug-naïve, active users and nonusers. The transitions between categories were modelled using interval-censored parametric survival analysis. The resulting hazard rate functions were used as time-dependent rate constants in a differential equation system. Covariate models for sex and depression status were assessed.

RESULTS

AddHealth enrolled 6504 American teenagers (median age 16 years, range 11-21 years); this cohort was followed with five interviews over a 22-year period; the median age at the last interview was 38 years (range 34-45 years). The percentages of illicit drug users at Interviews 1-5 were 7.7%, 5.9%, 15.8%, 21.4% and 0.98%, respectively. The generalized gamma distribution emerged as the preferred model for the survival functions for transitions between categories. Age-dependent prevalence was obtained from the differential equation system. Active drug use was more prevalent in males, increased in adolescence and college years, peaked at 24 years, and decreased to low levels by 35 years. Depression, which was more frequent in females, increased the drug-naïve-active user transition rates but not the active user-nonuser and nonuser-active user transition rates. The evidence did not support an interaction between sex and depression.

CONCLUSIONS

The model provided a satisfactory approximation for the age-dependent progression of illicit substance use from preadolescence to early middle age.

Promoting research engagement among women with addiction: Impact of recovery peer support in a pilot randomized mixed-methods study

OBJECTIVE

The impact of involving peers on research engagement is largely unknown. The purpose of this pilot study, a part of a larger research, was to evaluate the impact of recovery peer involvement as a study team member on recruitment/retention of persons with lived experience of SUD during pregnancy and to assess participant perceptions about factors impacting engagement of this population and their children in research, especially brain magnetic resonance imaging (MRI).

METHODS

This study randomly assigned participants (1:1) to either Peer or Research Coordinator (RC) arms. Eligible participants were English-speaking adult, non-pregnant females with lived experience of substance use during pregnancy. Certified Peers were recruited word of mouth and completed study-specific training. The impact of trained, certified Peer versus RC on research engagement was assessed by between-arm comparison of retention rates. Quantitative and qualitative survey data on participant perceptions were summarized.

RESULTS

Thirty-eight individuals enrolled into the study (19 Peer, 19 RC). Peer versus RC had 7.2 times greater odds of completing Visit 2 (Fisher's exact test; 95%CI: 1.2, 81.8; p = 0.03). The majority (70.4%) of respondents identified being accompanied by a peer and getting a tour of the MRI facility/procedures as 'extremely' helpful for improving participant comfort and engagement in future studies. Motivators of future research engagement also included creating a trusting, supportive, non-judgmental research environment, and linkages to treatment and other services.

CONCLUSION

Findings support the notion that peers involved as research team members could boost research engagement among persons with substance use during pregnancy.

Pre-Loading with Drugs before Entering the Nighttime Entertainment District: A Scoping Review

Background: Nighttime entertainment districts attract many people who pre-load with alcohol and other substances before entering licensed venues. Despite the harms and dangers associated with both alcohol pre-loading and drug use respectively, there is a paucity of research on drug and polysubstance pre-loading. Objectives: The primary objectives of this scoping review are to systematically map out the body of existing literature on drug and polysubstance pre-loading, discuss methodological potentials and pitfalls in field-based research, identify gaps in knowledge, and derive practical implications and opportunities for future research. Methods: Using the PRISMA (ScR) guidelines, we conducted a search of Medline, PsycINFO, Embase, Scopus, CINAHL, Social Services Abstracts, Sociological Abstracts, and Web of Science databases. We followed this up by conducting an author and citation analysis of relevant articles. Results: Of the 632 data sources identified, 338 articles were reviewed after removing duplicates. Overall, only nine articles were included and thematically analyzed. In our review and analysis of the literature, we find people who drug pre-load to be a particularly vulnerable subset of the population. We also posit that the point-of-entry design has greater sensitivity than the commonly used portal-in design. From this, we also draw attention to various time points where field-based researchers can provide intervention. Conclusions: Given the high prevalence of young adults engaging in the behavior, clinicians should consider pre-loading behaviors when assessing for risk and vulnerability. Field-based research would elucidate the full breadth and scope of the growing pre-loading phenomenon and the dangers associated with this practice.

Risk of Central Serous Chorioretinopathy in Male Androgen Abusers

INTRODUCTION

Male gender is an important risk factor of central serous chorioretinopathy (CSC), and studies have explored the pathophysiological role of androgens in CSC with conflicting results. In this study, we shed light on this hot topic by exploring the risk of CSC in a large cohort of male androgen abusers.

METHODS

This study included male androgen abusers identified through a nationwide anti-doping test program across Danish fitness centers from January 3 2006 to March 1 2018. For each case, we randomly sampled ten male controls using Danish nationwide registries. These controls were matched in age and date. Cases and controls were followed until May 16 2018. Data on diagnoses were extracted using the Danish National Registry of Patients using ICD-10 codes to identify cases with CSC.

RESULTS

We included 1189 cases and 11,890 controls. Mean age at the time of doping sentence was 27.4 ± 6.9 years, and mean length of follow-up was 15.8 ± 3.6 years. We identified no cases of CSC in androgen abusers, and five cases of CSC in the control cohort. The difference between groups was not statistically significant (P = 1.0).

CONCLUSIONS

Male androgen abusers were not at increased risk of CSC. Considering the lack of any signal in this large study, we speculate that if male androgen plays any direct role in the pathophysiology of CSC, its role may be subtle at best.

A mixed-methods analysis of risk-reduction strategies adopted by syringe services program participants and non-syringe services program participants in New York City

BACKGROUND

Since the emergence of fentanyl in the drug market, syringe services programs (SSPs) have been at the forefront of providing life-saving tools such as naloxone and fentanyl test strips to people who use drugs (PWUD). It is still unclear, however, how the adoption of risk-reduction practices has differed among PWUD in the context of increasing presence of non-pharmaceutical fentanyl in the drug supply. This study aims to assess the adoption of risk-reduction tools (e.g., naloxone) among those engaged with SSP services and those not engaged with SSP services.

METHODS

We conducted a mixed-methods study following a convergent parallel design integrating both quantitative and qualitative data. Interviews were conducted with 80 people who used street opioids (i.e., heroin or opioid pills not prescribed), 32 of whom were not engaged in SSP services. Quantitative differences between those engaged and those not engaged in SSPs were assessed using independent samples t tests and Fisher's exact tests. A thematic analytic approach was employed to compare qualitative responses between the two groups.

RESULTS

Three main themes emerged in our analysis: (1) Both groups expressed an interest in fentanyl test strips (FTS), but those engaged in SSP services found them to be more accessible; (2) there was greater adoption of and enthusiasm for naloxone among SSP participants; and (3) SSP participants were more likely to have or be interested in having someone check in on them when using alone, but stigma and perceived personal risk of overdose prevented widespread adoption of this practice among all participants.

CONCLUSION

SSPs provide a vital function by facilitating naloxone and FTS distribution to participants who often have little control over their exposure to fentanyl. However, stigma and misconceptions regarding drug use are barriers to people adopting risk-reduction practices, particularly among those not engaged with SSPs.

Prevalence of illicit drug consumption in a population of Hanoi: an estimation using wastewater-based epidemiology

Illicit drug use is a serious issue in Vietnam, but information about their prevalence is scarce, mainly based on seizure data. Wastewater-based epidemiology (WBE) is an alternative tool for obtaining such information, especially when stigma related to drug use can hinder survey approaches. The study aimed to apply WBE to assess the prevalence of use of a range of illicit drugs in an urban population of Vietnam. A total of 184 wastewater samples were collected at two different sites along a sewage canal, receiving sewage from over 400,000 people in Hanoi, Vietnam, in three different periods between 2018 and 2020. Illicit drugs and their metabolites were measured by direct injection using liquid chromatography-tandem mass spectrometry. The results were back-estimated, normalised to per capita daily consumption for assessement of consumption patterns and trends. Most drugs were detected in all the samples except cocaine, benzoylecgonine, amphetamine indicating a low prevalence of cocaine and amphetamine use. The estimated consumption level of methamphetamine was varied from 119.5 to 553.5 mg/d/1000 pp. The market of illicit drugs in Vietnam has changed from opiates to amphetamine-type simulants, and methamphetamine has replaced heroin as the No.1 drug, its use can be as much as 3 times more than heroin use. Moreover, we observed the considerable and potentially increasing level of ketamine consumption in Hanoi. No statistical difference was found in daily consumption per capita among days of the week for any drugs, both legal (codeine, methadone) and illegal (methamphetamine, MDMA, ketamine and heroin), suggesting the drugs were consumed mainly by regular users. This study provides important information related the illicit drug consumption in Vietnam, which will help to formulate appropriate drug control policies in this country.

How ethics committees and requirements are structuring health research in the Philippines: a qualitative study

BACKGROUND

The last few decades have seen the rising global acknowledgment of the importance of ethics in the conduct of health research. But research ethics committees or institutional review boards (IRBs) have also been criticized for being barriers to research. This article examines the case of the Philippines, where little has been done to interrogate the health research and IRB culture, and whose circumstances can serve as reflection points for other low- and middle-income countries.

METHODS

Semi-structured interviews were conducted from July to October 2020 to elicit health researchers' perspectives and experiences regarding IRBs and the ethics approval process in the country, as well as counterpoint narratives from researchers who have also worked for IRBs.

RESULTS

Across the fields of clinical, public health, and social science research, the issue of ethics review revealed itself to be foremost an issue of inequity. IRB processes serve as a barrier for those outside the academe; those belonging to institutions, cities, or entire regions without their own accredited IRBs; and researchers working independently, without ample budget, or on highly specialized topics-more so for non-clinical researchers who must grapple with the primarily biomedical framework of most IRBs. Consequently, the research landscape invariably favors those with the resources to do research, and researches that tend to attract funding.

CONCLUSION

The broader challenge of equity in health research will entail more fundamental reforms, but proximal interventions can be done to make the ethics approval process more equitable, such as enhancing institutional oversight, regulating IRB fees, and enabling a more supportive and welcoming environment for early-career, student, independent, and non-clinical health researchers. This article ends by reflecting on the implications of our findings toward the larger research culture.

The role of rash-impulsivity, emotional dysregulation and reward drive in comorbid disordered eating and substance use disorders

Purpose

Substance use disorder (SUD) frequently co-occurs with other psychological conditions, such as eating disorders (EDs). Psychological factors such as emotional dysregulation, rash impulsivity (RI) and reward sensitivity (RS) play a role in the etiology of each disorder, yet little is known about the combined effects of these on comorbid SUDs and EDs or disordered eating behaviours (DEBs). This study aims to examine the role of these psychological factors in comorbid DEBs and SUDs among individuals in treatment for SUDs. The role of gender is tested as a moderator.

Design/methodology/approach

A cross-sectional self-report survey was completed by 131 participants attending Australian residential substance use treatment centres. A binomial logistic regression analysis was performed to examine the effects of emotional dysregulation, RI and RS on comorbid DEB and SUD. Further, moderation analyses were used to examine the moderating effect for gender on the relationship between these three personality variables and comorbidity.

Findings

The most commonly reported primary substance of use was alcohol (43.5%), followed by amphetamines (38.6%). Findings showed that emotional dysregulation and RI were significantly related to an increase in comorbidity likelihood; however, RS was not. Gender moderated the relationship between comorbidity and RI only.

Originality/value

The significant positive relationship found between RI and comorbidity for females only was a novel finding for the current study. Further research is needed to develop an understanding of the etiology of comorbidity.

Peer recovery services for persons returning from prison: Pilot randomized clinical trial investigation of SUPPORT

Previously incarcerated persons with substance use disorder (SUD) need recovery supports, given the overrepresentation of this population in prison and community supervision. Peer support programs have the potential to fill gaps in postrelease support for persons with SUD. To assess the effectiveness of peer support approaches, this pilot study randomized access to peer recovery coaches within a well-established community reentry program. We examined several proximal outcomes to determine potential mechanisms of action, along with several exploratory outcomes. While attrition due to re-incarceration, death, and program disengagement was high, our findings suggest that those who received peer recovery coach support in the reentry program had recovery-based improvements, including improved self-reported mental and physical health and reductions in substance use behaviors. The treatment group also saw improvements in measures of treatment motivation and self-efficacy. Both groups saw similar positive trends in some outcomes, likely due to the relative success of the well-established reentry program regardless of the inclusion of peer support coaches. This study contributes lessons learned and potential mechanisms of action to limited research on the effectiveness of peer recovery supports for reentry populations with SUD.