Faculty Bibliography

Background/UNASSIGNED:We explored characteristics and beliefs associated with e-cigarette use patterns among cigarette smokers requiring inpatient detoxification for opioid and/or alcohol use disorder(s). Methods/UNASSIGNED:-test statistics, and logistic regression models were used. Results/UNASSIGNED: Conclusions/UNASSIGNED:E-cigarette use seems to be appealing to a small proportion of cigarette smokers with SUD. Although, dual smokers seem to use e-cigarettes for its cessation premise, they don't appear to be actively seeking to quit. E-cigarettes may offer a more effective method for harm reduction, further evaluation of incorporating it within smoking cessation protocols among patients in addiction treatment is needed.

HIV pre-exposure prophylaxis (PrEP) is a highly effective prevention strategy, yet awareness, knowledge, and willingness to use it among people who inject drugs (PWID) remains inadequate despite widespread eligibility. Stigma, particularly HIV-stigmatizing beliefs and attitudes, may be a key barrier to engagement at early stages of the PrEP care continuum. We examine how HIV-stigmatizing beliefs and attitudes affect PrEP awareness, knowledge, and willingness among PWID. We surveyed 262 HIV-negative PWID in Los Angeles and Denver (2021-2023) and used structural equation modeling to examine associations between HIV-stigmatizing beliefs and attitudes (11-item validated scale with α = 0.899 and 1-factor structure) and three early PrEP outcomes: awareness, knowledge, and willingness, while controlling for race/ethnicity, gender, housing status, and conducted sub-analyses on willingness to use long-acting injectable PrEP. HIV-stigmatizing beliefs and attitudes were significantly associated with lower PrEP awareness (β - 0.212, p < 0.001) and less accurate knowledge (β - 0.179, p = 0.006). Accurate knowledge was associated with greater willingness to use PrEP (β 0.175, p = 0.027). Black, Indigenous, and Other Persons of Color (BIPOC) participants reported higher HIV-stigmatizing beliefs and attitudes than non-Hispanic White participants (β 0.196, p = 0.003). Over half (56%) of participants were willing to take daily oral PrEP once informed, and many were interested in long-acting injectable PrEP. HIV-stigmatizing beliefs and attitudes are associated with lower PrEP care continuum engagement among PWID, particularly through limiting awareness and understanding of PrEP. BIPOC participants reported higher levels of stigmatizing attitudes, suggesting that broader structural and intersectional stigma may shape PrEP engagement, consistent with prior research. Interventions to increase PrEP uptake should address both individual- and structural-level stigma and consider leveraging peer networks and community supports to foster resilience and improve equitable access to HIV prevention tools.

OBJECTIVE/UNASSIGNED:To examine how exposure to advertising channels is associated with e-cigarette use among youth in the United States. METHODS/UNASSIGNED:This study included 161,700 middle and high school students aged 9-18 years from the 2014-2022 National Youth Tobacco Survey data. Multivariate logistic regressions estimated adjusted odds ratios (aORs) and 95 % confidence intervals (CIs) for the association between exposure to advertising channels and ever e-cigarette use. Annual percent change (APC) for ever e-cigarette use and exposure to each advertising channel were analyzed using Joinpoint regression. Data for 2014-2018 and 2019-2022 were analyzed separately due to the change in survey format and weighting procedure. RESULTS/UNASSIGNED:Ever e-cigarette use prevalence increased (APC = + 2.78: 95 % CI -13.65, 21.38) between 2014 and 2018, then declined (APC = -18.20 %: 95 % CI -27.11, 8.36) between 2019 and 2022. Exposure to retail (2014-2018 aOR = 1.36: 95 % CI 1.29, 1.43; 2019-2022 aOR = 1.46: 95 % CI 1.38, 1.54) and internet advertising (2014-2018 aOR = 1.43: 95 % CI 1.35, 1.51; 2019-2022 aOR = 1.19: 95 % CI 1.13, 1.25) were associated with higher odds of ever e-cigarette use. CONCLUSIONS/UNASSIGNED:Exposure to retail and internet marketing increased the likelihood of ever-use of e-cigarettes among youth in the US. Additional regulations for point-of-sale and internet advertisements should be implemented.

BACKGROUND/UNASSIGNED:Despite the growing relevance of rural areas in the overdose crisis, research on rural people who inject drugs and their experiences with law enforcement remains limited. This research examines how rural policing and stigma uniquely shape the lives of people who inject drugs. METHODS/UNASSIGNED:Forty-one semi-structured qualitative interviews were conducted with people who inject drugs in southern Illinois. For this analysis, we focused on participants who mentioned police in response to the question, "Have you ever been treated differently because you used drugs?" RESULTS/UNASSIGNED:We identified three interrelated manifestations of stigma in rural people who inject drugs' interactions with police-verbal degradation and discrediting, unwarranted searches, and dehumanization-that align with Earnshaw's (2020) model distinguishing between stigma components (stereotypes, prejudice, discrimination) and health impact pathways. CONCLUSION/UNASSIGNED:This study emphasizes the impact of stigma on people who use drugs, particularly in their interactions with law enforcement.

INTRODUCTION/BACKGROUND:E-cigarettes (ECs) and heated tobacco products (HTPs) are recent arrivals to the nicotine product market in the Middle East, which are rapidly growing in popularity in the region. There is a lack of surveillance data at the country-level on use of these products and factors associated with their use. METHODS:This study analyzed a subset of data from the UAE Healthy Future Study, a population-based cohort study of the Emirati population, to determine the factors associated with EC and HTP use among a sample of Emirati adults (≥ 18 years). The baseline assessment and supplementary questionnaires, conducted from 2016 to 2023, included data on combustible tobacco use, EC, and HTP use and sociodemographic characteristics. RESULTS:Of the 2,041 individuals who answered questions on EC use, 32% reported ever using them. Of 521 people providing data on HTP, 30% reported ever using them. After adjusting for age, sex, education, perceived harms and perceived addictiveness of EC, current EC use was associated with baseline combustible tobacco smoking (aOR = 27.63, 95% confidence interval [CI] 14.39, 53.06), users of a younger age (aOR=0.91, 95%CI 0.88, 0.95), and users of male sex (OR = 2.15, 95% CI 1.21, 3.81). Current HTP use was less common, but was also associated with baseline combustible tobacco use. CONCLUSIONS:Use of ECs and HTPs was more common among those who used combustible tobacco. Future research should examine use trajectories among those who do and do not smoke, as well as uptake of these products among youth. IMPLICATIONS/CONCLUSIONS:Non-combustible nicotine products are growing in popularity in the Middle East Region. Our study found that EC and HTP use is associated with baseline combustible tobacco use and that concurrent users may use them to cut down on their combustible tobacco use. Continued comprehensive population-based monitoring of all tobacco and nicotine products, especially EC and HTP use, will provide current data to aid in appropriately informing public health and harm reduction messages and programming.

BACKGROUND/UNASSIGNED:Ecological momentary assessment (EMA) provides insight into the effectiveness and feasibility of smoking-related interventions. OBJECTIVE/UNASSIGNED:The objective of this paper was to assess adherence to an EMA protocol and compare EMA-derived responses with measures collected through multiple surveys. METHODS/UNASSIGNED:A subanalysis was conducted using data from a 12-week, open-label, and 2-arm pilot randomized clinical trial among adult smokers with chronic obstructive pulmonary disease, coronary artery disease, peripheral vascular disease, or asthma in the last 12 months (n=109). Participants were randomized to either electronic cigarette (EC) or nicotine replacement therapy (NRT) treatment arms. We compared EMA data collected through automated SMS text message prompts sent to participants 4 times daily for 12 weeks, including cigarettes smoked per day (CPD), craving, and satisfaction, to survey data collected at 12 weeks. Convergent validity between survey- and EMA-reported measures was evaluated using Pearson correlation and paired t tests. CPD was modeled using negative binomial regression. Relative rates (RRs) of reaching at least 50%, 75%, and 100% CPD reduction between two arms were calculated using both EMA and survey data. RESULTS/UNASSIGNED:The majority of participants were non-Hispanic White (63/109, 58%) and female (60/109, 55%), and had a median age of 60 (IQR 54-65) years. Among the 109 participants, 59.6% (n=65) were consistently adherent to the EMA protocol over the 12-week period. Median weekly EMA response rate remained high over the 12-week study period even though a modest decline was observed (week 1, 97.8% and week 12, 89.4%). The mean CPD declined significantly (week 1, mean 14.2, SD 9.9 and week 12, mean 4.6, SD 6.7; P<.001). EMA-derived and survey-based CPD measurements were positively correlated (r=0.73, 95% CI 0.6-0.82) as were measures of craving (r=0.38, 95% CI 0.17-0.56). No significant paired difference in CPD was observed between EMA measurements and surveys. A significant effect of time on CPD EMA data (incidence rate ratio [IRR] 1-week change 0.93; P<.01) and survey data was found (IRR 12-week change 0.36; P<.01). However, the treatment effect was not significant, which aligned with the RR results. An increase in the EC consumption was observed over time in the EC arm, with 12.1% (7/58) fully switched to EC (defined as CPD=0 and EC use>0) and 20.7% (12/58) mostly switched (defined as a reduction in CPD>75% and EC use>0) in week 12. CONCLUSIONS/UNASSIGNED:EMA is a suitable method to collect recall-based smoking-related data. Though results from mixed effect modeling and RR comparisons were similar using EMA or survey data, EMA provides unique advantages, namely greater granularity in the time and the capability to detect switching patterns in near real time. These findings provide the feasibility of using EMA in developing smoking cessation interventions in future tobacco harm reduction research.

BACKGROUND:Smoking among adults in substance use disorder (SUD) treatment programs is common with limited success in quitting. Given e-cigarettes' potential for smoking harm reduction, it is important to examine e-cigarette use among people in SUD treatment. METHODS:We analyzed data from adults who have received SUD treatment in the past year, from the 2020-2021 National Survey on Drug Use and Health (N = 1,246). We delineated correlates of lifetime and current (past-month) use e-cigarette use. RESULTS:Among adults receiving SUD treatment, an estimated 39.4 % (95 % CI: 34.1, 45.1) have used e-cigarettes in their lifetime and 19.5 % (95 % CI: 16.1, 23.6) of those currently vape. Among those reporting current vaping, an estimated 57.3 % (95 % CI: 44.9-68.8) currently smoke cigarettes and half (54.2 % [95 % CI: 41.1-66.7]) currently use cannabis. Compared to those who only received treatment for alcohol use disorder, those receiving treatment for drug use (aPR = 1.47, 95 % CI: 1.09-1.99) and alcohol and drug use (aPR = 1.60, 95 % CI: 1.16-2.22) had higher prevalence of lifetime e-cigarette use, and those reporting treatment for drug use only (aPR = 2.60, 95 % CI: 1.52-4.46) and alcohol and drug use (aPR = 2.82, 95 % CI: 1.63-4.87) also had higher prevalence of current e-cigarette use. CONCLUSIONS:The prevalence of e-cigarette use was higher among those in treatment for both drug or alcohol and drugs only than those receiving treatment for only alcohol use. Smoking harm reduction interventions can potentially include e-cigarette among those receiving drug treatment. There is also a need to address challenges of dual e-cigarette and cigarette use, as well as dual e-cigarette use with cannabis.

BACKGROUND:Off-label prescribing of ketamine to treat psychiatric disorders has been increasing, as has recreational use and availability of illicit ketamine. It is important to examine trends in ketamine-related poisonings to inform public health efforts. METHODS:We examined data from poisonings (exposures) involving ketamine reported to Poison Centers in the US between 2019 and 2023 (n = 1519). Annual trends were examined for number of exposures and characteristics of exposures, and we delineated correlates of major (life-threatening) adverse effects and death compared to less severe outcomes. RESULTS:The number of reported ketamine exposures increased from 205 in 2019 to 414 in 2023. Most cases involved ketamine ingestion (57.2 %), and a plurality involved misuse or "abuse" (36.2 %) and moderate effects (44.8 %). The percentage of cases involving suspected suicide attempts doubled from 12.7 % in 2019 to 25.9 % (a 103.9 % increase; P < 0.001); ingestion use increased from 46.0 % to 65.2 % (a 41.7 % increase; P < 0.001), and cases involving ketamine in liquid form decreased from 65.1 % to 41.2 % (a 36.7 % decrease; P < 0.001). Cases with major effects or death decreased from 23.4 % in 2019 to 15.6 % in 2023 (a 33.2 % decrease; P = 0.039). A major event or death was experienced by 18.6 % of cases, but prevalence was lower for those who inhaled ketamine (aPR=0.49, 95 % CI:0.29-0.85) compared to those who did not inhale. DISCUSSION/CONCLUSIONS:Poisonings involving ketamine are at their highest in reporting history. Both medical and recreational ketamine use and related adverse events need to be monitored, especially as off-label prescribing of take-home oral formulations appears to be increasing.

BACKGROUND/UNASSIGNED:Family history of substance use (FHSU), along with sociodemographic and psychosocial factors, has been identified as a key risk factor for adolescent substance use and progression to substance use disorders (SUD). However, the interaction between distinct sociodemographic and psychosocial profiles in adolescents with FHSU and constitutional factors, such as psychopathological symptom severity, impulsivity, and reward processing, remains unclear. Given the complexity of these factors, it is crucial to explore how these elements contribute to the differential vulnerability to SUD among youth with family history of substance use. Particularly as, the identification of clinically relevant subgroups of at-risk youth may inform precision prevention and treatment approaches to reduce adverse outcomes related to SUDs. METHODS/UNASSIGNED: = 4,369; female 48.33%, White 61.16%), respectively]. We used K-means clustering to identify latent subgroups in the FHSU-P population based on psychosocial variables and then compared the resulting subgroups on internalizing, externalizing, and total psychopathology, impulsivity, and reward prediction errors. RESULTS/UNASSIGNED: = 443) were characterized by lower engagement across peer, school, and parental domains. Group comparisons showed that Subgroups 1 and 2 had comparable levels of psychopathology and impulsivity, while Subgroups 3, 4, and 5 displayed higher psychopathology and impulsivity. Reward prediction errors were similar across all subgroups. Other group differences are also presented and discussed in the main text. CONCLUSION/UNASSIGNED:These findings highlight significant heterogeneity within the FHSU-P group and emphasize the importance of stratifying adolescents based on sociodemographic and psychosocial factors. Such stratification can help identify adolescents at higher risk for psychopathologies, including SUDs, offering insights for targeted prevention and intervention strategies.

BACKGROUND/UNASSIGNED:Electronic cigarettes (EC) may serve as a potential smoking harm reduction tool by addressing both nicotine and behavioral dependence. This qualitative study reports the feasibility and acceptability of using EC and telehealth counseling among individuals in treatment programs for opioid use disorders (OUD) who smoke combustible cigarette, and was conducted as part of a randomized controlled trial. We report findings among participants in the EC arm. METHODS/UNASSIGNED:Qualitative interviews were conducted from March to May 2021. The interviews were audio recorded, transcribed, and de-identified. An inductive approach guided by the Theoretical Framework of Acceptability was used. We developed and refined a codebook through a collaborative iterative process and team discussions. Five analysts coded the transcripts using Quirkos, with independent double coding for each transcript to achieve consensus and ensure inter-coder reliability. In-depth thematic analysis was conducted via synthesizing relevant codes that were described and exemplified using representative quotes. Saturation was achieved when no additional codes emerged. RESULTS/UNASSIGNED:Eleven participants randomized to EC were interviewed: average age = 55 years (range = 39-69), 88% were male, 41% non-Hispanic black, and 35% non-Hispanic white. Four main themes identified included inciting sense of accountability toward cigarette smoking reduction; acknowledging the value of telehealth counseling; noting positive attributes such as addressing craving, as well as challenges in utilizing EC such as the need to remember charging the EC; and finally, participants' expression of the satisfaction with their perceived improvements in their health and other behavioral aspects. CONCLUSION/UNASSIGNED:The intervention combining telehealth counseling with EC was perceived as acceptable and helpful for reducing cigarette smoking, as well as resulting in other positive health benefits. ECs were easy to use and seemed to address craving; albeit with some challenges that can be addressed in future trials. EC combined with telehealth counseling carries great promise in smoking reduction among individuals with OUD.