Detecting univariate, bivariate, and overall effects of drug mixtures using Bayesian kernel machine regression.

Background: Innovative analytic approaches to drug studies are needed to understand better the co-use of opioids with non-opioids among people using illicit drugs. One approach is the Bayesian kernel machine regression (BKMR), widely applied in environmental epidemiology to study exposure mixtures but has received far less attention in substance use research.Objective: To describe the utility of the BKMR approach to study the effects of drug substance mixtures on health outcomes.Methods: We simulated data for 200 individuals. Using the Vale and Maurelli method, we simulated multivariate non-normal drug exposure data: xylazine (mean = 300 ng/mL, SD = 100 ng/mL), fentanyl (mean = 200 ng/mL, SD = 71 ng/mL), benzodiazepine (mean = 300 ng/mL, SD = 55 ng/mL), and nitazene (mean = 200 ng/mL, SD = 141 ng/mL) concentrations. We performed 10,000 MCMC sampling iterations with three Markov chains. Model diagnostics included trace plots, r-hat values, and effective sample sizes. We also provided visual relationships of the univariate and bivariate exposure-response and the overall mixture effect.Results: Higher levels of fentanyl and nitazene concentrations were associated with higher levels of the simulated health outcome, controlling for age. Trace plots, r-hat values, and effective sample size statistics demonstrated BKMR stability across multiple Markov chains.Conclusions: Our understanding of drug mixtures tends to be limited to studies of single-drug models. BKMR offers an innovative way to discern which substances pose a greater health risk than other substances and can be applied to assess univariate, bivariate, and cumulative drug effects on health outcomes.

Overdose Risk and Brain Injury (Traumatic Brain Injury/Acquired Brain Injury), A Commentary.

OBJECTIVE: This commentary seeks to evaluate existing knowledge about the relationship between brain injury (BI) and overdose (OD), to unify distant bodies of literature, and to enhance prevention and treatment for opioid OD among individuals with BI. BACKGROUND: There is a hidden epidemic of undiagnosed BI in the United States. Due to lack of screening, the vast majority of BI sufferers do not know they have a BI. Not only are those with BI at elevated risk for opioid use, misuse, and opioid use disorder, but also they are at elevated risk for OD. Conversely, those with OUD and those who experienced an OD, are more likely to sustain BI. Key Findings/Conclusions: The existing literature suggests that primary strategies to reduce ABI (Acquired Brain Injury)/TBI (Traumatic Brain Injury) harms involve addressing: screening, stigma, racial disparities, and popular misconceptions about OD. The association between TBI and OD is an underexamined public health issue, exacerbated by the bidirectional nature of the relationship. Not only is TBI a risk factor for opioid OD; opioid OD was also found to be a major cause of ABI, which can have lifelong effects similar to Alzheimer's disease. Screening tools for BI were underutilized and inconsistently implemented across reviewed studies. Enhanced screening population wide is a promising intervention, complemented with expanded treatment and research. Black individuals face worse outcomes in BI and treatment outcomes. Anti-racist strategies must fight inequity while addressing social and structural drivers of overdose and BI within the opioid and opioid overdose crises.

Racial/ethnic disparities in opioid overdose prevention: comparison of the naloxone care cascade in White, Latinx, and Black people who use opioids in New York City.

BACKGROUND: Drug overdose mortality is rising precipitously among Black people who use drugs. In NYC, the overdose mortality rate is now highest in Black (38.2 per 100,000) followed by the Latinx (33.6 per 100,000) and white (32.7 per 100,000) residents. Improved understanding of access to harm reduction including naloxone across racial/ethnic groups is warranted. METHODS: Using data from an ongoing study of people who use illicit opioids in NYC (N = 575), we quantified racial/ethnic differences in the naloxone care cascade. RESULTS: We observed gaps across the cascade overall in the cohort, including in naloxone training (66%), current possession (53%) daily access during using and non-using days (21%), 100% access during opioid use (20%), and complete protection (having naloxone and someone who could administer it present during 100% of opioid use events; 12%). Naloxone coverage was greater in white (training: 79%, possession: 62%, daily access: 33%, access during use: 27%, and complete protection: 13%, respectively) and Latinx (training: 67%, possession: 54%, daily access: 22%, access during use: 24%, and complete protection: 16%, respectively) versus Black (training: 59%, possession: 48%, daily access:13%, access during use: 12%, and complete protection: 8%, respectively) participants. Black participants, versus white participants, had disproportionately low odds of naloxone training (OR 0.40, 95% CI 0.22-0.72). Among participants aged 51 years or older, Black race (versus white, the referent) was strongly associated with lower levels of being trained in naloxone use (OR 0.20, 95% CI 0.07-0.63) and having 100% naloxone access during use (OR 0.34, 95% CI 0.13-0.91). Compared to white women, Black women had 0.27 times the odds of being trained in naloxone use (95% CI 0.10-0.72). CONCLUSIONS: There is insufficient protection by naloxone during opioid use, with disproportionately low access among Black people who use drugs, and a heightened disparity among older Black people and Black women.

"As safe as possible": a qualitative study of opioid withdrawal and risk behavior among people who use illegal opioids.

BACKGROUND: Opioid withdrawal is a regular occurrence among many people who use illicit opioids (PWUIO) that has also been shown to increase their willingness to engage in risk-involved behavior. The proliferation of fentanyl in the illicit opioid market may have amplified this relationship, potentially putting PWUIO at greater risk of negative health outcomes. Understanding the relationship between withdrawal and risk-involved behavior may also have important implications for the ways that problematic drug use is conceptualized, particularly in disease models of addiction, which position risk behavior as evidence of pathology that helps to justify ontological distinctions between addicts and non-addicts. Examining withdrawal, and its role in PWUIO's willingness to engage in risk, may aid in the development of alternative theories of risk involvement and create discursive spaces for de-medicalizing and de-othering people who use illegal drugs. METHODS: This article is based on 32 semi-structured interviews with PWUIO in the New York City area who also reported recent withdrawal experience. Interviews were conducted remotely between April and August 2022 and recorded for later transcription. Data were then coded and analyzed based on a combination of inductive and deductive coding strategies and informed by the literature. RESULTS: Participants described a strong relationship between withdrawal and their willingness to engage in risk-involved behavior that was exacerbated by the proliferation of fentanyl. Yet, their descriptions did not align with narratives of risk as a product of bad decisions made by individuals. Rather, data demonstrated the substantial role of social and structural context, particularly drug policies like prohibition and criminalization, in the kinds of risks that PWUIO faced and their ability to respond to them. CONCLUSIONS: Withdrawal should be taken more seriously both from an ethical perspective and as an important catalyst of risk behavior. However, theories that position activities taken to avoid withdrawal as irrational and as evidence of pathology are poorly aligned with the complexity of PWUIO's actual lives. We recommend the use of less deterministic and less medicalized theories of risk that better account for differences between how people view the world, and for the role of socio-structural forces in the production of risk.

Naloxone protection, social support, network characteristics, and overdose experiences among a cohort of people who use illicit opioids in New York City.

BACKGROUND: Despite increased availability of take-home naloxone, many people who use opioids do so in unprotected contexts, with no other person who might administer naloxone present, increasing the likelihood that an overdose will result in death. Thus, there is a social nature to being "protected" from overdose mortality, which highlights the importance of identifying background factors that promote access to protective social networks among people who use opioids. METHODS: We used respondent-driven sampling to recruit adults residing in New York City who reported recent (past 3-day) nonmedical opioid use (n = 575). Participants completed a baseline assessment that included past 30-day measures of substance use, overdose experiences, and number of "protected" opioid use events, defined as involving naloxone and the presence of another person who could administer it, as well as measures of network characteristics and social support. We used modified Poisson regression with robust variance to estimate unadjusted and adjusted prevalence ratios (PRs) and 95% confidence intervals (CIs). RESULTS: 66% of participants had ever been trained to administer naloxone, 18% had used it in the past three months, and 32% had experienced a recent overdose (past 30 days). During recent opioid use events, 64% reported never having naloxone and a person to administer present. This was more common among those: aged ≥ 50 years (PR: 1.18 (CI 1.03, 1.34); who identified as non-Hispanic Black (PR: 1.27 (CI 1.05, 1.53); experienced higher levels of stigma consciousness (PR: 1.13 (CI 1.00, 1.28); and with small social networks (< 5 persons) (APR: 1.14 (CI 0.98, 1.31). Having a recent overdose experience was associated with severe opioid use disorder (PR: 2.45 (CI 1.49, 4.04), suicidality (PR: 1.72 (CI 1.19, 2.49), depression (PR: 1.54 (CI 1.20, 1.98) and positive urinalysis result for benzodiazepines (PR: 1.56 (CI 1.23, 1.96), but not with network size. CONCLUSIONS: Results show considerable gaps in naloxone protection among people who use opioids, with more vulnerable and historically disadvantaged subpopulations less likely to be protected. Larger social networks of people who use opioids may be an important resource to curtail overdose mortality, but more effort is needed to harness the protective aspects of social networks.

Challenges to Opioid Treatment Programs After Hurricane Sandy: Patient and Provider Perspectives on Preparation, Impact, and Recovery.

Over 300,000 patients with an opioid use disorder (OUD) receive methadone maintenance therapy from opioid treatment programs (OTPs) in the United States. Large numbers of these attend OTPs located in New York and New Jersey, areas (largely but not exclusively coastal) impacted by Hurricane Sandy (Sandy) on October 29th, 2012. Disruption of methadone dispensing and other services can have severe consequences to patients (and treatment seekers) such as relapse, dropping out of treatment and resumption or increase in HIV/HCV injection risk behaviors. To facilitate OTP preparedness and response, we developed recommendations for OTPs for future emergencies. Using both qualitative and quantitative measures, we obtained data from OTP directors, staff, patients and out-of-treatment persons to learn how OTPs prepared for the impending hurricane, whether recovery efforts were successful, and what impact the hurricane has had. We observed a wide range of preparation and recovery efforts among participating programs. Director, staff, and patient perspectives on programs' responses and storm impact often differed. Triangulated data suggest that program responses were adequate for a majority of patients. For a sizeable minority of patients, program responses were very successful; for at least 20% of the clinics, program planning and responses were inadequate to meet the needs of patients. Among the recommendations made for sustaining continuity of care in future emergencies are: a focus on improving communication, procuring transportation, guest dosing, and take home provisions.

Implementation of Online Opioid Prevention, Recognition and Response Trainings for Laypeople: Year 1 Survey Results.

BACKGROUND: This article reports on the first implementation of an online opioid-overdose prevention, recognition and response training for laypeople. The training was disseminated nationally in November 2014. Between 2000 and 2014, U.S. opioid deaths increased by 200%. The importance of complementary approaches to reduce opioid overdose deaths, such as online training, cannot be overstated. OBJECTIVES: A retrospective evaluation was conducted to assess perceived knowledge, skills to intervene in an overdose, confidence to intervene, and satisfaction with the training. MEASUREMENTS: Descriptive statistics were used to report sample characteristics, compare experiences with overdose and/or naloxone between subgroups, and describe participants' satisfaction with the trainings. Z-ratios were used to compare independent proportions, and paired t-tests were used to compare participant responses to items pre- and posttraining, including perceived confidence to intervene and perceived knowledge and skills to intervene successfully. RESULTS: Between January and October 2015, 2,450 laypeople took the online training; 1,464 (59.8%) agreed to be contacted. Of these, 311 (21.2% of those contacted) completed the survey. Over 80% reported high satisfaction with content, format and mode of delivery and high satisfaction with items related to confidence and overdose reversal preparedness. Notably, 89.0% of participants felt they had the knowledge and skills to intervene successfully posttraining compared to 20.3% pretraining (z = -17.2, p <.001). Similarly, posttraining, 87.8% of participants felt confident they could successfully intervene compared to 24.4% pretraining (z = -15.9, p <.001). CONCLUSIONS: This study demonstrates the effectiveness of the GetNaloxoneNow.org online training for laypeople.

Competing Constructivisms: The Negotiation of PTSD and Related Stigma Among Post-9/11 Veterans in New York City.

Posttraumatic stress disorder (PTSD) stands as a form of psychopathology that straddles moral and psychiatric domains. Grounded in discrete instances of trauma, PTSD represents an etiological outlier in an era of increased attention to the genetics of mental illness and a prime location for social constructivist analyses of mental illness. This examination of PTSD narratives-as voiced in qualitative interviews and focus groups with 50 veterans of the recent Iraq and Afghanistan wars living in New York City-attends to the processes through which veterans conceive and navigate PTSD symptoms and diagnoses. In so doing we highlight the social constructivist positions undertaken by veterans themselves as they varyingly challenge and internalize symptomology in dialogue with psychiatric definitions and the stigma associated with PTSD. Findings demonstrate the rejection of classic psychopathological etiology-in brain disease, for example-by many veterans as well as the complex balancing of benefit and stigma that veterans undertake when making decisions about presenting to psychiatric clinicians. Drawing on veterans' accounts, we argue for greater cultural specificity in characterizing the diagnosis-seeking behavior of trauma survivors and a greater appreciation for the contradictions and compromise related to both acceptance and rejection of a mental health diagnosis.

Opioid-Involved Overdose Among Male Afghanistan/Iraq-Era U.S. Military Veterans: A Multidimensional Perspective.

BACKGROUND: Mirroring nationwide trends in a broad range of U.S. populations, an alarming number of Afghanistan/Iraq-era U.S. Military veterans have experienced opioid-related overdoses. A growing body of research has examined the proximal behaviors that can precipitate an overdose; considerably less is known about more distal physiological, psychosocial and structural influences on these risk behaviors. OBJECTIVES: This study adopts a multidimensional approach to better understand opioid-related overdose among U.S. Military veterans, and seeks to explore not only the proximal behavioral precipitants of overdose events, but also the complex nexus of physiological, psychological, and sociological influences that undergird overdose events. METHODS: This qualitative examination is based on interview data from 36 male veterans who were discharged from the military after September 2001 and experienced at least one opioid-related overdose during or after military service. Participants were recruited in New York City during 2014 to share narrative accounts of their overdoses. RESULTS: Veterans' accounts indicate that background experiences, such as self-medication for social and psychological pain, trauma, social alienation and isolation, and histories of illicit drug use, precondition the more immediate factors and behaviors that precipitate overdose (including bingeing on drugs, mixing drugs, naiveté about dosage, and ambivalence about life/death). CONCLUSIONS: Findings suggest the need for comprehensive drug safety and overdose education that is sensitive to veterans' physiological, psychological, and sociological conditions. A multidimensional understanding of the distal and proximal overdose risks faced by veterans and other vulnerable groups may help lay a foundation for more inclusive/holistic approaches to overdose prevention and education.

Development of an opioid-related Overdose Risk Behavior Scale (ORBS).

BACKGROUND: Drug overdose has emerged as the leading cause of injury-related death in the United States, driven by prescription opioid (PO) misuse, polysubstance use, and use of heroin. To better understand opioid-related overdose risks that may change over time and across populations, there is a need for a more comprehensive assessment of related risk behaviors. Drawing on existing research, formative interviews, and discussions with community and scientific advisors an opioid-related Overdose Risk Behavior Scale (ORBS) was developed. METHODS: Military veterans reporting any use of heroin or POs in the past month were enrolled using venue-based and chain referral recruitment. The final scale consisted of 25 items grouped into 5 subscales eliciting the number of days in the past 30 during which the participant engaged in each behavior. Internal reliability, test-retest reliability and criterion validity were assessed using Cronbach's alpha, intraclass correlations (ICC) and Pearson's correlations with indicators of having overdosed during the past 30 days, respectivelyInternal reliability, test-retest reliability and criterion validity were assessed using Cronbach's alpha, intraclass correlations (ICC) and Pearson's correlations with indicators of having overdosed during the past 30 days, respectively. RESULTS: Data for 220 veterans were analyzed. The 5 subscales-(A) Adherence to Opioid Dosage and Therapeutic Purposes; (B) Alternative Methods of Opioid Administration; (C) Solitary Opioid Use; (D) Use of Nonprescribed Overdose-associated Drugs; and (E) Concurrent Use of POs, Other Psychoactive Drugs and Alcohol-generally showed good internal reliability (alpha range = 0.61 to 0.88), test-retest reliability (ICC range = 0.81 to 0.90), and criterion validity (r range = 0.22 to 0.66). The subscales were internally consistent with each other (alpha = 0.84). The scale mean had an ICC value of 0.99, and correlations with validators ranged from 0.44 to 0.56. CONCLUSIONS: These results constitute preliminary evidence for the reliability and validity of the new scale. If further validated, it could help improve overdose prevention and response research and could help improve the precision of overdose education and prevention efforts.

Recent Overdose Experiences in a Community Sample of Military Veterans Who Use Opioids.

Rising rates of overdose mortality underscore the importance of understanding and preventing overdose. We developed a seven-item scale for the assessment of nonfatal opioid-related overdose experiences, adding items on others' perceptions of whether the participant had overdosed and whether an intervention was attempted to frequently used criteria. We administered the scale to 240 primarily male and minority veterans, recruited using venue-based and chain-referral sampling, who separated from the military post-9/11 and reported current opioid use. The items were internally consistent, and correlated well with overdose risk behaviors (r = .13-.45). The new scale detected overdose events in a significantly higher proportion of participants (36.5%) than that using either self-report criterion (18.2%) or difficulty breathing and losing consciousness criteria (23.8%). These experiences or perceptions should be investigated to inform and better tailor the development of more effective overdose prevention and response programs.

Exploration of weekly variation in naloxone possession and carriage among people who use opioids in New York City before, during, and after the COVID-19 pandemic.

BACKGROUND: Naloxone is critical for reversing opioid-related overdoses. However, there is a dearth of research examining how naloxone possession and carriage are impacted by time-varying individual and social determinants, and if this differed during the height of the COVID-related mitigation measures (e.g., shutdowns). METHODS: We utilized weekly ecological momentary assessments (EMA) to measure factors associated with naloxone possession and carriage among 40 people who use illicit opioids in New York City, for 24 months. Descriptive statistics were used to explore the frequency of weeks with consistent naloxone possession and carriage. Mixed effects binary and multivariable logistic regression was used to test for the impact of time-varying EMA- and baseline-level factors on each outcome. RESULTS: Approximately 70% of weekly EMAs were associated with consistent naloxone possession or carriage. In multivariable models, compared to during the height of the COVID-related shutdowns (March 12, 2020-May 19, 2021), the time before was associated with lower odds of consistent possession (Odds Ratio (OR) = 0.05, 95% Confidence Interval (CI) = 0.01-0.15) and consistent carriage (OR = 0.06, CI = 0.01-0.25). Additionally, being female (OR = 11.15, CI = 2.85-43.42), being White versus being Black or Hispanic/Latinx (OR = 8.05, CI = 1.96-33.06), and lifetime overdose (OR = 1.96, CI = 1.16-19.80) were associated with higher odds of consistent possession. Recent opioid injection (OR = 3.66, CI = 1.34-9.94), being female (OR = 7.91, CI = 3.91-8.23), and being White (OR = 5.77, CI = 1.35-24.55) were associated with higher odds of consistent carriage. Not wanting to be perceived as a drug user was reported in nearly one third (29.0%; 190/656) of EMAs where inconsistent possession was reported. CONCLUSIONS: Our findings paint a relatively positive picture of possession and carriage during COVID-related shutdowns, particularly among white and female participants, and highlight the importance of capturing time-varying factors to understand naloxone-related behavior. To curb growing disparities, outreach to equip Black and Hispanic/Latinx people with naloxone is needed as well as interventions to reduce stigma as a barrier to naloxone engagement.

Evaluation of self-directed specimen collection for chlamydia and gonorrhea testing among people who use drugs.

Background: People who use drugs (PWUD) often have elevated sexually transmitted infection (STI) risk and unmet healthcare needs. Self-directed STI specimen collection (i.e., individuals collect the specimen and mail to the laboratory) may be valuable in addressing STI testing barriers among PWUD. Methods: Within a cohort study among PWUD in New York City, we conducted a cross-sectional substudy from November 2021-August 2022 assessing sexual health with a one-time online survey (n = 120); participants could opt-in to receive a self-collection kit. Participants who opted-in were mailed a kit containing collection materials (males: urine cup, females: vaginal swab), pre-paid return label, instructions, and educational information. Specimens were sent to the laboratory and tested for Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (GC). We measured the number of kits requested, delivered, mailed to the lab, and CT/GC positive; and examined differences in requesting a kit by sociodemographic and behavioral characteristics. Results: Sixty-three total kits were requested by 44 unique participants. Of the 63 requested, 41 were delivered; one kit was undeliverable at the provided address and the rest were not sent due to no address provided or being duplicate requests. Of the 41 kits delivered, three participants returned the kit to the lab; of those, one was positive for CT and GC. The greatest differences in those who did and did not request a kit were observed by age, sexual orientation, past-year sex trade and casual partnerships, and experiences of relationship violence. Conclusions: Self-directed specimen collection may be desirable for PWUD, but research is needed to understand barriers to this testing approach for this population.

Opioid and other substance misuse, overdose risk, and the potential for prevention among a sample of OEF/OIF veterans in New York City.

This paper describes veterans' overdose risks and specific vulnerabilities through an analysis of qualitative data collected from a sample of recently separated, formerly enlisted OEF/OIF veterans in the New York City area. We illustrate how challenges to the civilian readjustment process such as homelessness, unemployment, and posttraumatic stress disorder can render veterans at increased risk for negative health consequences and then present veterans' perspectives as they outline several innovative solutions to these obstacles. We conclude by discussing several overdose prevention efforts currently underway and how they might be adapted to meet the opioid and substance misuse challenges veterans face.

The opiate pain reliever epidemic among U.S. arrestees 2000-2010: regional and demographic variations.

The increasing rate of opiate pain reliever (OPR) use is a pressing concern in the United States. This article uses a drug epidemics framework to examine OPR use among arrestees surveyed by the Arrestee Drug Abuse Monitoring program. Results demonstrate regional and demographic variation in use across nine focal cities. High rates of OPR use on the West Coast illustrate the expansion of use from its initial epicenter. By 2010, OPR use had plateaued in all focal cities. Findings suggest directions for ongoing research into pathways to use and vectors of diffusion and for regionally specific interventions sensitive to age and ethnic diversity.

Pathways to racial disparities in the effects of Good Samaritan Laws: A mixed methods pilot study.

BACKGROUND: Drug overdose deaths continue to rise, and considerable racial inequities have emerged. Overdose Good Samaritan laws (GSLs) are intended to encourage overdose witnesses to seek emergency assistance. However, evidence of their effectiveness is mixed, and little is known regarding racial disparities in their implementation. This study examined GSL impact by assessing racial differences in awareness of and trust in New York state's GSL. METHODS: Using a sequential mixed methods design, Black and white participants were recruited from an existing longitudinal cohort study of people who use illicit opioids in New York City to participate in a quantitative survey and qualitative interviews. Racially stratified survey responses were analyzed using chi-squared tests, Fisher exact tests, or t-tests. Qualitative interviews were analyzed using a hybrid inductive-deductive approach. RESULTS: Participants (n=128) were 56% male and predominantly aged 50 years or older. Most met criteria for severe opioid use disorder (81%). Fifty-seven percent reported that the New York GSL makes them more likely to call 911 even though 42% reported not trusting law enforcement to abide by the GSL; neither differed by race. Black people were less likely to have heard of the GSL (36.1% vs 60%) and were less likely to have accurate information regarding its protections (40.4% vs 49.6%). CONCLUSIONS: Though GSLs may reduce negative impacts of the criminalization of people who use drugs, their implementation may exacerbate existing racial disparities. Resources should be directed towards harm reduction strategies that do not rely on trust in law enforcement.

The COVID-19 pandemic and the health of people who use illicit opioids in New York City, the first 12 months.

BACKGROUND: Concurrent opioid-related overdose and COVID-19 crises in the U.S. have imposed unprecedented challenges on people who use illicit opioids. METHODS: Using the experiences of 324 people who use illicit opioids between April 2020 and March 2021, we examined four domains of health and well-being potentially impacted by COVID-19: drug risks and responses, healthcare and related services, material hardship, and mental health. Data were drawn from participants' completed monthly survey assessments which were grouped into four periods of interest for the unfolding pandemic: April-June 2020, July-October 2020, November-January 2021, and February-March 2021. RESULTS: A majority of measures in our four domains showed early COVID-19 related impacts, which quickly diminished as people and agencies responded to the pandemic. Difficulty obtaining food was the most frequently reported material hardship and appeared worst in April-June 2020. Over half of the population reported depression in April-June 2020, but this declined over the study period. Some participants reported changes to the heroin supply, including higher prices, lower quality, difficulty finding the drug, and fentanyl contamination. There was no discernable temporal shift in the frequency of use of each substance or the frequency of withdrawal symptoms. Over the study period, the mean number of overdoses per month decreased while the percent of opioid use events at which both a witness and naloxone were present (i.e., protected events) increased. Most participants receiving MOUD experienced an increase in take-home doses. CONCLUSIONS: Findings speak to the resilience of people who use drugs as a population with disproportionate experience of trauma and crisis and also to the rapid response of NYC health agencies and service providers working with this population. Despite evident signs of adaptability and resilience, the COVID-19 pandemic has highlighted some of the unique vulnerabilities of people who use illicit opioids and the need for greater rates of "protected" opioid use and greater availability of wrap-around services to efficiently address the safety, food security, mental health, and treatment needs of the population.

Parenting and childcare responsibilities, harm reduction service engagement, and opioid overdose among women and men who use illicit opioids in New York City.

Background: Little is known regarding relationships among parenting, engagement in harm reduction services, and overdose risk among people who use illicit opioids (PWUIO), and whether associations differ by gender. Methods: Using baseline data from an ongoing study among PWUIO in New York City (n = 575), we measured childcare factors (i.e., residing with children, avoidance of drug treatment for fear of child welfare, difficulty accessing harm reduction due to childcare issues), and harm reduction services and overdose-related outcomes. Among those with children, we estimated prevalence ratios (PR) using modified Poisson regression with a product-interaction term for gender differences. Results: In the total sample (n = 575), approximately 70% reported having children. Compared to men, women were more likely to reside with children (25% vs 36%; p-value = 0.04), avoid treatment for fear of child welfare (16% vs 26%; p-value = 0.04), and less likely to be trained in naloxone administration (68% vs 61%; p-value = 0.09). Among participants with children (n = 403), residing with children was associated with naloxone training among men (aPR 1.28, 95% CI: 1.01, 1.62). Avoiding treatment for fear of child welfare was associated with carrying naloxone overall (aPR 0.68, 95% CI: 0.46, 0.99), with a stronger association among women (aPR 0.48, 95% CI: 0.26, 0.92). Difficulty accessing services due to childcare was associated with lifetime overdose (aPR 1.53, 95% CI: 1.05, 2.23). Conclusion: Childcare responsibilities may be a barrier for accessing substance use services and treatment for men and women. Further qualitative and mixed-methods research is needed to understand how to make treatment and services accessible for parents.

Evaluation of an Experimental Web-based Educational Module on Opioid-related Occupational Safety Among Police Officers: Protocol for a Randomized Pragmatic Trial to Minimize Barriers to Overdose Response.

BACKGROUND: As drug-related morbidity and mortality continue to surge, police officers are on the front lines of the North American overdose (OD) crisis. Drug law enforcement shapes health risks among people who use drugs (PWUD), while also impacting the occupational health and wellness of officers. Effective interventions to align law enforcement practices with public health and occupational safety goals remain underresearched. OBJECTIVE: The Opioids and Police Safety Study (OPS) aims to shift police practices relating to PWUD. It adapts and evaluates the relative effectiveness of a curriculum that bundles content on public health promotion with occupational risk reduction (ORR) to supplement a web-based OD response and naloxone training platform (GetNaloxoneNow.org, or GNN). This novel approach has the potential to improve public health and occupational safety practices, including using naloxone to reverse ODs, referring PWUD to treatment and other supportive services, and avoiding syringe confiscation. METHODS: This longitudinal study uses a randomized pragmatic trial design. A sample of 300 active-duty police officers from select counties in Pennsylvania, Vermont, and New Hampshire with high OD fatality rates will be randomized (n=150 each) to either the experimental arm (GNN + OPS) or the control arm (GNN + COVID-19 ORR). A pre- and posttraining survey will be administered to all 300 officers, after which they will be administered quarterly surveys for 12 months. A subsample of police officers will also be qualitatively followed in a simultaneous embedded mixed-methods approach. Research ethics approval was obtained from the New York University Institutional Review Board. RESULTS: Results will provide an understanding of the experiences, knowledge, and perceptions of this sample of law enforcement personnel. Generalized linear models will be used to analyze differences in key behavioral outcomes between the participants in each of the 2 study arms and across multiple time points (anticipated minimum effect size to be detected, d=0.50). Findings will be disseminated widely, and the training products will be available nationally once the study is completed. CONCLUSIONS: The OPS is the first study to longitudinally assess the impact of a web-based opioid-related ORR intervention for law enforcement in the U.S. Our randomized pragmatic clinical trial aims to remove barriers to life-saving police engagement with PWUD/people who inject drugs by focusing both on the safety of law enforcement and evidence-based and best practices for working with persons at risk of an opioid OD. Our simultaneous embedded mixed-methods approach will provide empirical evaluation of the diffusion of the naloxone-based response among law enforcement. TRIAL REGISTRATION: ClinicalTrail.gov NCT05008523; https://clinicaltrials.gov/show/NCT05008523. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/33451.

U.S. Military veterans and the opioid overdose crisis: a review of risk factors and prevention efforts.

U.S. military veterans have been heavily impacted by the opioid overdose crisis, with drug overdose mortality rates increasing by 53% from 2010-2019. Risk for overdose among veterans is complex and influenced by ongoing interaction among physiological/biological, psychological, and socio-structural factors. A thorough understanding of opioid-related overdose among veterans, one that goes beyond simple pharmacological determinism, must examine the interplay of pain, pain treatment, and stress, as well as psychological and social experiences-before, during, and after military service. Comprehensive efforts to tackle the overdose crisis among veterans require interventions that address each of these dimensions. Promising interventions include widespread naloxone distribution and increased provision of low-threshold wrap-around services, including medications for opioid use disorder (MOUD) and holistic/complementary approaches. Interventions that are delivered by peers - individuals who share key experiential or sociodemographic characteristics with the population being served - may be ideally suited to address many of the barriers to opioid-related risk mitigation common among veterans. Community care models could be beneficial for the large proportion of veterans who are not connected to the Veterans Health Administration and for veterans who, for various reasons including mental health problems and the avoidance of stigma, are socially isolated or reluctant to use traditional substance use services. Interventions need to be tailored in such a way that they reach those more socially isolated veterans who may not have access to naloxone or the social support to help them in overdose situations. It is important to incorporate the perspectives and voices of veterans with lived experience of substance use into the design and implementation of new overdose prevention resources and strategies to meet the needs of this population. Key messagesU.S. military veterans have been heavily impacted by the opioid overdose crisis, with drug overdose mortality rates increasing by 53% from 2010-2019.The risks for overdose that veterans face need to be understood as resulting from an ongoing interaction among biological/physiological, psychological, and social/structural factors.Addressing drug overdose in the veteran population requires accessible and non-judgemental, low threshold, wraparound, and holistic solutions that recognise the complex aetiology of overdose risk for veterans.