Motivational Network Intervention to Reduce Substance Use and Increase Supportive Connections for Emerging Adults in a Supportive Housing Program.

BACKGROUND: For transition-aged youth experiencing homelessness (TAYEH) moving to transitional housing, a motivational network intervention (MNI) may help modify high-risk networks, thereby reducing substance use and strengthening prosocial connections. METHODS: Thirty-six TAYEH received a four-session MNI integrated into usual housing case management or usual case management. Intervention acceptability, feasibility, and motivational interviewing fidelity were evaluated. RESULTS: Nearly all participants would recommend the MNI to others, formed goals, and believed the program improved their lives. Case managers delivered the program with fidelity. However, sample size and number of sessions delivered fell short of targets due to COVID-19 disruptions and other factors and limited our ability to examine preliminary effects on substance use and network outcomes in a fully powered trial. CONCLUSION: Case managers can successfully deliver the MNI, but its use may not be feasible unless adaptations are made to accommodate the instability this population faces when they enter housing.

Discrimination experiences and problematic alcohol and cannabis use in young adulthood.

BACKGROUND AND OBJECTIVES: Limited research has examined how discrimination in young adulthood relates to substance use. We examined how multiple and specific types (e.g., race-based) of experiences of unfair treatment are related to problematic alcohol and cannabis use. METHODS: We analyzed cross-sectional data from a diverse cohort of young adults (mean age 24.7) predominantly residing in southern California (n = 2303) to examine associations of multiple (count) and specific experiences (race-, sexual orientation-, gender-based) of perceived everyday discrimination with self-reported alcohol and cannabis use outcomes (consequences, use disorders, and solitary use). We also tested interactions between the three specific discrimination experiences and sociodemographic characteristics (e.g., race-based discrimination × race/ethnicity). RESULTS: In this diverse sample (e.g., 47% Latinx/o and 22% Asian; 22% sexual/gender diverse; 56% female) of young adults, about 46% reported up to four different discrimination experiences and 27% reported race-, 26% gender-, and 5% sexual orientation-based discrimination. Race- and gender-based discrimination and experiencing more types of discrimination were associated with worse cannabis use outcomes. Race-based discrimination was associated with fewer alcohol consequences and lower Alcohol Use Disorders Identification Test (AUDIT) scores. Associations with sexual orientation-based discrimination and the interactions were not significant. DISCUSSION AND CONCLUSIONS: Findings build on limited research on associations of discrimination with cannabis use in young adults. More work is needed to understand the mechanisms by which discrimination influences drinking behaviors. SCIENTIFIC SIGNIFICANCE: This study advances the field by examining the unique contributions of specific and multiple types of discrimination experiences in young adulthood, a critical developmental period in which substance use peaks.

In flux: Associations of substance use with instability in housing, employment, and income among young adults experiencing homelessness.

Young adults experiencing homelessness (YAEH) are faced with instabilities in many areas of their lives, including their living situation, employment, and income. Little is known about how the experience of instability in these different domains might be associated with substance use. Leveraging data collected on 276 YAEH in Los Angeles County, regression analyses examine associations between three distinct types of instability (housing, employment, income) and participants' self-reported alcohol use, alcohol consequences, non-cannabis drug use, and substance use symptoms. Results indicated that recent instability in income, employment, and secure housing for those with access to it (but not housing in general or non-secure housing) were significantly associated with greater alcohol/drug use or substance use symptoms. Depression was also found to moderate the association between employment instability and alcohol use. Our findings suggest that efforts to reduce instability in income, employment, and secure housing may have positive benefits for substance using YAEH, especially those with depressive symptoms.

Health-related social control among U.S. adults ages 30-80: Associations with alcohol use over four years.

Health-related social control (HRSC) includes efforts to regulate or influence others' health behaviors and is an important way interpersonal relationships can affect individual-level health. This study used egocentric network data to describe the size and composition of HRSC networks, identify trajectories of HRSC receipt, and examine how HRSC is related to binge drinking and alcohol-related problems. Data come from a U.S. nationally representative sample of 1235 adults age 30 and older (baseline mean age = 52, 52% female, 64% White) who completed four annual surveys between 2019 and 2022. On average, 30% of adults' network members were HRSC agents who told or reminded them to do things to protect their health. At baseline, 50% of respondents identified a spouse/partner as a HRSC agent, 56% a relative, 46% a friend, and 12% someone else. Respondents' relationships with HRSC agents were generally strong, 93% of agents were described as people "whose opinion matters," and only 10% were described as hassling or making life difficult for the respondent. Growth mixture modeling identified five trajectories of HRSC receipt over the four-year period: Stable High (36% of sample), Stable Moderate (47%), Stable Low (14%), Decreasing (2%), and Increasing (2%). Binge drinking was relatively consistent for the three Stable HRSC classes (ranging from 11% to 15% of individuals), decreased steadily for the Increasing HRSC class (32%-16%), and fluctuated for the Decreasing HRSC class (decreasing from 10% to 2%, then increasing to 8%). For alcohol problems, the Increasing HRSC class showed the largest increase (2%-21%) before dropping to near-baseline levels (4%), whereas the Decreasing HRSC class fluctuated during the first three waves followed by no individuals reporting alcohol problems at the last wave. Results highlight the importance of examining heterogeneity in adults' HRSC experiences because of its implications for understanding social influences on health-related behaviors.

Associations between service use and behavioral health trajectories among young adults experiencing homelessness.

Purpose: To examine associations of service use (housing, mental health, substance use, education, and employment) with depression and substance use disorder (SUD) trajectories among young adults experiencing homelessness. Method: Secondary data come from 276 young adults who participated in an intervention to reduce substance use and sexual risk behaviors. Participants were recruited from three drop-in centers in Los Angeles County from 2018 to 2020, and completed surveys at baseline, 3-, 6-, 12-, and 24-months post-baseline. Latent growth curve models examined trajectories of depression and SUD; service use in the past three months was used to predict growth trajectories. Results: More frequent use of mental health services (but not other services) at baseline was associated with greater depression symptoms at baseline, linear declines in depression, and a quadratic increase in depression. Service use at baseline was not associated with likelihood of SUD at baseline or changes in SUD over time. Conclusions: Young adults in most need of behavioral services are likely to receive services for mental health, but not SUD. Use of mental health services may reduce depression symptoms over time, but continuing care may be needed to prevent symptom returns. More work is needed to connect young adults with SUD treatment and improve effectiveness of these services.

Homelessness and Food Insecurity During Emerging Adulthood: Associations With Changes in Behavioral and Physical Health Over a Two-Year Period.

PURPOSE: For emerging adults in the United States, economic instability is a widespread problem with implications for the successful transition to adulthood. This study examines how two indicators of economic instability, homelessness and food insecurity, are associated with changes in health-related outcomes over a two-year period. METHODS: The analytic sample (N = 2,182) completed online surveys in 2019-2020 (mean age 23 years) and 2021-2022 (mean age 25 years). Regression analyses were conducted for the full sample, as well as by sexual or gender diverse (SGD) identity (17.8% of sample identified as SGD) and race/ethnicity (76.3% identified as non-White). RESULTS: At age 23, 8.2% of participants reported homelessness and 31.2% reported food insecurity. In the full sample, homelessness and food insecurity were associated with increased depression, anxiety, physical ailments, and drug problems two years later. A similar pattern emerged for those identifying as non-SGD. The only associations for SGD-identifying participants were food insecurity with increased anxiety, depression, and physical ailments. Racial/ethnic differences indicated that homelessness was associated with increased depression and anxiety among Hispanics, and physical ailments and drug consequences among Asians, but fewer drug problems among Whites. Food insecurity was associated with increased depression in all racial/ethnic groups, anxiety among Hispanics and Asians, physical ailments among Whites and Asians, and drug problems among Asians. DISCUSSION: Homelessness and food insecurity predicted worse health outcomes during the transition to adulthood, with varying results across SGD and racial/ethnic subgroups. It is important for future research to continue examining long-term effects of economic instability on health disparities during this important developmental period.

Trajectories of alcohol and cannabis use among emerging adults with a history of unstable housing: Associations with functioning over a two-year period.

INTRODUCTION: Research has documented high rates of alcohol and cannabis use among emerging adults experiencing homelessness. However, little is known about trajectories of use over time or how trajectories are associated with functioning (e.g., risk behaviors, mental and physical health, social functioning, economic well-being). METHODS: Data come from a cohort of 18-25 year olds experiencing homelessness who were surveyed 5 times over 24 months. Parallel process growth mixture models were used to model heterogeneity in alcohol and cannabis use across the 5 timepoints, which allowed for the extraction of classes based on both alcohol and cannabis use trajectories. Classes were compared on demographics and functioning at baseline and 24-months. RESULTS: Two trajectory classes of alcohol and cannabis use emerged: moderate decreasing cannabis and low stable alcohol use (75% of the sample) and heavy cannabis and alcohol use (25% of the sample). The heavy cannabis and alcohol use class reported a significantly higher likelihood for any non-cannabis drug use at baseline and 24-months, as well as greater depression and physical ailments at 24-months. In addition, at 24-months this class had a marginally higher likelihood of a positive screen for at least moderate anxiety and being recently unhoused. CONCLUSIONS: The effects of heavy continued cannabis and alcohol co-use on multiple domains of functioning (e.g., risk behavior, mental and physical health) highlight the importance of a coordinated systems approach that addresses the often complex and interrelated challenges facing emerging adults with a history of homelessness.

Understanding effects of the group process on drinking outcomes for emerging adults experiencing homelessness.

BACKGROUND: There is little research on group process for motivational interviewing-based group interventions with young people. We examine how change talk, group climate and cohesion, and facilitator empathy among emerging adults experiencing homelessness affect their drinking outcomes. METHODS: Data come from a clinical trial at three drop-in centers serving emerging adults experiencing homelessness in Los Angeles County and focus on those who received the intervention (n = 132). Participants completed baseline, 3-, 6-, and 12-month follow-up surveys. They were predominantly male and non-white. Group sessions were digitally recorded and coded for percentage change talk (PCT), group climate and cohesion, and facilitator empathy. RESULTS: Because baseline alcohol use was significantly higher at site 1 than sites 2 and 3, we examined associations separately by site. At 6 months, higher PCT was associated with fewer drinks per drinking day for sites 2 and 3, whereas higher PCT was associated with more drinks per drinking day for site 1. There were no effects of PCT at 12 months. Higher group cohesion scores were associated with fewer drinking days at 6 months; higher facilitator empathy was associated with fewer maximum drinks in a day at both 6 and 12 months. Group climate was not associated with drinking outcomes. CONCLUSIONS: These findings highlight the importance of measuring multiple factors in the group process to understand outcomes. What is "uttered" during group and what is observed provide different methods to evaluate the group process and allow us to better bridge the gap between research and practice.

A phone-based tobacco use cessation program for people living with HIV in Uganda and Zambia: study protocol for a randomized controlled trial.

BACKGROUND: Nicotine replacement therapy (NRT) and short messaging service (SMS)-based tobacco cessation interventions have demonstrated effectiveness in reducing tobacco use in many populations, but evidence is needed on which tailored treatments are most efficacious in meeting the complex medical and psychosocial factors confronting people living with HIV (PLWH) in sub-Saharan Africa (SSA). This paper describes the protocol of a study to test the efficacy of both NRT and a tailored SMS-based tobacco use cessation intervention among PLWH in Uganda and Zambia. METHODS: In a randomized controlled trial, 800 adult PLWH who use tobacco will be recruited by health care professionals at HIV treatment centers where they are receiving care. Participants will be randomized to one of the four study arms: (1) standard of care [SOC; brief clinician advice to quit combined with HIV education and information aimed at encouraging HIV treatment adherence (with no mention of tobacco) delivered via text messages]; (2) SOC + 12 weeks of NRT; (3) SOC + 6 weeks of SMS text messages to support quitting tobacco use (SMS); or (4) SOC + NRT + SMS. Participants will receive a cell phone and solar panel with power bank for charging the phone. The main outcome is cessation of tobacco use by study participants verified by urinary cotinine (< 15 ng/mL) at 6 months post-enrollment. As a secondary tobacco use outcome, we will measure 7-day point-prevalence abstinence (7 consecutive days of no tobacco use) measured by self-report and biochemically-verified at 4 weeks, 8 weeks, and 3 months post enrollment. DISCUSSION: Our study will provide insight into the efficacy, feasibility and applicability of delivering tobacco cessation interventions through health care professionals combined with tailored tobacco cessation SMS text messaging in two countries with different tobacco use patterns, policy environments, and health care resources and provide needed information to providers and policymakers looking for cost-effective tobacco cessation interventions. The previously tested SMS-platform to be used in our study is uniquely positioned to be scaled in low- and middle-income countries worldwide, in which case evidence of even modest success in reducing the prevalence of tobacco consumption among PLWH could confer enormous health and economic benefits. TRIAL REGISTRATION: ClinicalTrials.gov Identifier NCT05487807. Registered August 4, 2022, https://clinicaltrials.gov/ct2/show/record/NCT05487807.

Sober Curiosity and Participation in Temporary Alcohol Abstinence Challenges in a Cohort of U.S. Emerging Adults.

OBJECTIVE: Thus far, behavioral health research in the United States has not explored the prevalence or correlates of sober curiosity (SC; exploratory or experimental abstinence or moderation) or temporary alcohol abstinence challenges (TAACs; e.g., "Dry January"), despite significant attention in media and popular discourse. We explored these activities in a sample of U.S. emerging adults (e.g., ages 18-29), a population with higher-risk drinking behavior yet some of the lowest rates of treatment engagement for alcohol use problems. METHOD: Survey data were collected in 2021-2022 among participants (n = 1,659; M age = 24.7 years). We assessed SC awareness/engagement and past-year TAAC participation, and differences across demographics and behavioral characteristics. RESULTS: Overall, 9% of emerging adults were familiar with SC and 7% had participated in a TAAC in the past year. Half of TAAC participants reported drinking less after the TAAC, and 15% remained abstinent after the TAAC ended. SC familiarity and TAAC were both associated with past-month heavy drinking, cannabis use, higher Alcohol Use Disorders Identification Test (AUDIT) scores, more past-year alcohol and cannabis consequences, past-year substance use treatment, and greater readiness to quit alcohol. CONCLUSIONS: Both SC and TAACs may have potential to engage young people with a desire to moderate or eliminate their alcohol consumption. This may occur directly through use of these strategies or by helping them connect to additional services. Future research can help the field understand the uptake of SC and TAACs, gauge efficacy, and identify avenues to link young people to resources and interventions.

Sociodemographic and Behavioral Risk Correlates of PrEP Interest and Use Among Young Adults Experiencing Homelessness in Los Angeles.

Young adults experiencing homelessness (YAEH) are at elevated risk for HIV compared to their stably housed peers. Preexposure prophylaxis (PrEP) is highly effective at preventing HIV infection, yet YAEH have been largely overlooked in PrEP efforts to date despite YAEH reporting high overall interest in PrEP. We assessed individual, social, and structural variables associated with PrEP interest and use among a sample of 195 YAEH (ages 18-25) recruited from drop-in centers across Los Angeles County who met criteria for HIV risk. In the current sample, though most had heard of PrEP (81.0%), the majority were not interested in taking PrEP (68.2%) and only a minority had used/were using PrEP (11.8%). YAEH who identified as sexual and/or gender minority, reported knowing someone who had used PrEP, or recently accessed sexual health services were more likely to have used and/or reported interest in using PrEP. Those who reported more episodes of heavy drinking were less likely to report having used PrEP. Suggestions are provided for better integrating PrEP-related services into existing behavioral and health service programs for YAEH, as well as leveraging peers and fostering positive social norms to reduce PrEP-related stigma and increase interest and use of PrEP among YAEH.

Predictors of Housing Trajectories Among Young Adults Experiencing Homelessness in Los Angeles.

Experiencing homelessness during young adulthood is associated with negative health outcomes and understanding housing trajectories of young adults experiencing homelessness may aid in the development of evidence-based public health programs designed to serve this at-risk age group. In the present study, the authors examined baseline predictors of 24-month trajectories of housing stability and unsheltered housing among a sample of 271 young adults aged 18 to 25 recruited from drop-in centers in Los Angeles. In multivariate models, the authors found that identifying as multi-racial/other and better friendship quality at baseline were associated with less steep increases in the likelihood of stable housing over time. Being employed at baseline was associated with a less steep decrease in the probability of being unsheltered over time, while illicit drug use days associated with a steeper decrease in the probability of being unsheltered over time. Continued research is needed to establish important factors determining young adults' long-term housing trajectories in the effort to promote greater access and engagement with housing services.

Longitudinal associations among experiences of sexual assault, posttraumatic stress disorder symptoms, and heavy drinking in young adults.

Prior research with young adults has demonstrated clear associations between experiences of sexual assault, symptoms of posttraumatic stress disorder (PTSD), and alcohol use, but most studies have been cross-sectional or have not considered multiple theoretical pathways to understand these associations. Using six waves of data from a longitudinal cohort sample of 1,719 young adults, we examined associations among experiences of past-year sexual assault (i.e., rape, unwanted sexual touching, and physical intimidation in a sexual way), PTSD symptoms, and the frequency of binge drinking over time, allowing for the exploration of symptom-induced, interpersonal risk, and substance-induced pathways for male and female participants. For both male, ßs = 2.84 to 6.55, and female participants, ßs = 2.96 to 10.1, higher prior levels of PTSD symptoms were associated with larger increases in binge drinking over time. For female participants, higher prior levels of sexual assault were associated with larger increases in PTSD symptoms over time, ßs = 3.48 to 4.25, whereas for male participants, higher prior levels of past-year binge drinking were associated with decreases in PTSD symptoms over time, ßs = -2.75 to -0.53. Continued efforts are needed to prevent sexual assault among young adults and address PTSD symptoms among those who experience sexual assault. Interventions that target binge drinking are also needed for individuals who experience PTSD symptoms, especially young adults, to address potentially hazardous drinking before problems escalate and become chronic.

Directional associations between posttraumatic stress disorder symptoms and cannabis use in young adults: Uncovering variation by sex, race, and ethnicity.

OBJECTIVE: Prevalence rates of cannabis use and PTSD vary, with men reporting greater cannabis use than females, females reporting higher rates of PTSD than males, and race and ethnic minority persons reporting higher rates of both cannabis and PTSD compared to non-Hispanic White individuals. This study extends our understanding of directional associations between cannabis use and PTSD from early to late young adulthood (18-26 years old) using two theoretical models: symptom-driven pathway and substance-induced pathway. METHOD: Participants provided yearly data for 14 years, and the present study utilized data from Waves 9 through 14. Those endorsing Criterion A in at least one wave of data collection (n = 1,454) were included in the analytic sample. We used autoregressive latent trajectory with structured residuals to understand reciprocal associations for the full sample, as well as by sex and race or ethnicity. RESULTS: For the full sample, we noted support for both symptom-driven and substance-induced pathways during early young adulthood (18-20) but only support for a symptom-driven pathway during late young adulthood (21-26). Males showed the same pattern as the full sample; however, for females, only a symptom-driven pathway during late young adulthood was found. For race and ethnic minority participants, we showed full cross-lagged effects during both early and late young adulthood and no associations for non-Hispanic White individuals. CONCLUSIONS: Results indicate that both men and individuals from minoritized racial and ethnic groups are more likely to report heightened PTSD symptomology, maladaptive coping, and worsening symptoms. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

A randomized controlled trial of a brief motivational interviewing-based group intervention for emerging adults experiencing homelessness: 24-month effects on alcohol use.

OBJECTIVE: Despite rates of alcohol misuse being higher among emerging adults experiencing homelessness compared to those who are stably housed, there are few brief evidence-based risk reduction programs for this population that focus on alcohol use and assess outcomes for more than 1 year. This study examines alcohol outcomes from a 24-month evaluation of AWARE, a brief motivational interviewing-based group risk reduction intervention for emerging adults experiencing homelessness. METHOD: In a cluster randomized crossover trial, 18- to 25- year-olds received AWARE (n = 132) or standard care (n = 144) at one of three drop-in centers serving young people experiencing homelessness in Los Angeles County. We evaluated intervention effects on past month alcohol use, consequences, and related cognitions such as motivation to change behavior. RESULTS: AWARE participants showed significant reductions over 24 months in alcohol use and negative consequences from drinking and reported significant increases in their use of drinking protective strategies. Except for drinking frequency, control group participants did not show a significant change in these outcomes. CONCLUSIONS: Findings build on earlier work by demonstrating that AWARE is effective in reducing alcohol use and related problems among emerging adults experiencing homelessness over a 2-year period. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Parallel trajectories of vaping and smoking cannabis and their associations with mental and physical well-being among young adults.

BACKGROUND: Vaping and smoking are common modes of using cannabis (THC) among young adults, but little is known about how patterns of cannabis vaping and smoking unfold over time or how using one or both types of products may differently affect mental and physical well-being. This study examines parallel processes of cannabis vaping and smoking over 5 years and mental and physical outcomes in a sample of young adults. METHODS: Annual surveys were conducted between 2016 and 2022 with a mostly California-based cohort of 2428 young adults. Parallel process growth mixture models examined trajectories of past-month frequency of cannabis vaping and smoking from ages 20 - 25. Classes were extracted based on parallel trajectories of vaped and smoked product use. Models assessed differences in self-reported mental (anxiety, depression) and physical (ailments, subjective overall) well-being outcomes in young adulthood across classes, adjusting for demographic characteristics and mental and physical well-being at pre-baseline (average age 19). RESULTS: Four cannabis vaping/smoking classes emerged: low use of cannabis (84.7%), decreasing smoking, low-moderate vaping (7.1%), stable moderate smoking, decreasing vaping (4.6%), and rapid increasing dual use (3.4%). Classes were similar on physical well-being indicators in young adulthood. The rapid increasing dual use class showed higher anxiety and depressive symptoms compared to other classes. CONCLUSION: Progression to higher frequency of both vaping and smoking cannabis in young adulthood may contribute to poorer mental well-being compared to other use patterns. Targeted efforts to reduce dual vaping and smoking in young people who use cannabis may be needed.

Unpacking disparities in substance-related outcomes among racial, ethnic, sexual, and gender minoritized groups during adolescence and emerging adulthood.

OBJECTIVE: Alcohol and other drug (AOD) use increases substantially from adolescence to emerging adulthood, and recent longitudinal studies show disparities in AOD-related outcomes by racial and ethnic, as well as sexual and gender minority (SGM), identities. Greater insight is needed into how individual, social, and environmental contexts interact and affect such disparities, as well as why disparate outcomes are found across different domains (e.g., social, educational, economic), even after accounting for intensity of use. This commentary addresses these important and timely issues. METHOD: We provide a brief overview of the literature, including our own team's work over the last 14 years, to identify and understand disparities in AOD-related outcomes during adolescence and emerging adulthood across individuals with different racial and ethnic, and sexual and gender, identities. We then discuss paths forward to advance research and build a stronger evidence base, leading to the development and identification of effective interventions that can help mitigate disparities among historically marginalized adolescents and emerging adults. RESULTS: Existing research highlights the need for further longitudinal work in several areas, including addressing contextual factors at various levels (e.g., individual, social, environmental) that may contribute to outcomes for different groups of individuals, developing and testing culturally appropriate AOD-related services, giving greater consideration to intersectionality of multiple minority identities, and using novel statistical approaches to help improve the estimation of differences across smaller subgroups of individuals in existing cohorts. CONCLUSIONS: To inform prevention programming and policy for improving health and well-being of historically marginalized populations, it is important to continue our efforts to understand disparities in AOD-related outcomes using multidisciplinary, equity, and intersectionality lenses. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

How do college students use their free time? A latent profile analysis of leisure activities and substance use.

College is a critical period of transition to independence and the substantial amount of time that students have to participate in leisure activities may be conducive to substance use. However, little is known about the associations between leisure activities and substance use over time, or whether these associations differ by residential status (i.e., living with parents vs. on their own). Using latent profile analysis, this study found six distinct profiles of leisure activity participation in a racially/ethnically diverse sample of college students (N=1,207). Overall, profiles with medium levels of leisure activity participation were associated with more alcohol use, heavy drinking, and marijuana use one year later; whereas profiles with the lowest levels of leisure activity participation were associated with more cigarette use one year later. Identifying mechanisms through which leisure activities influence substance use can help inform prevention efforts to either reduce risks associated with participation or support protective effects.

A randomized controlled trial of a brief motivational interviewing-based group intervention for emerging adults experiencing homelessness: 12-Month effects on substance use and sexual risk behavior.

INTRODUCTION: Few brief evidence-based risk reduction programs for emerging adults experiencing homelessness focus on the interrelated problems of substance use and sexual risk behavior. This study examines outcomes from a 12-month evaluation of AWARE, a brief Motivational Interviewing (MI)-based group risk reduction intervention for this population. METHODS: In a cluster randomized crossover trial, N = 276 18-25-year-olds received AWARE or usual care at drop-in centers serving homeless youth in Los Angeles County. We evaluated intervention effects on substance use and condomless sex (primary outcomes), as well as drinking consequences and protective strategies, number of casual partners, self-efficacy, and motivation for change (secondary outcomes). RESULTS: AWARE participants self-reported reductions in their alcohol use and negative consequences from drinking, and an increase in use of drinking protective strategies. AWARE participants also reported an initial decrease in drug use other than marijuana, followed by a slight uptake later on, as well as an initial increase in importance of cutting down on other drug use followed by a decrease. Control group participants did not show change in these outcomes. Among those who reported casual sex partners at both baseline and 12-month surveys, exploratory analyses indicated that AWARE participants had a 29 % decline in condomless sex with casual partners compared to a 6 % decline for control group participants. CONCLUSIONS: Findings build on our pilot work by demonstrating that AWARE has long-term benefits on drinking among emerging adults experiencing homelessness. Further work should seek to strengthen its long-term effectiveness in reducing drug use in this population.

Adolescent Cannabis Misuse Scale: Longitudinal Associations with Substance Use, Mental Health, and Social Determinants of Health in Early Adulthood.

BACKGROUND: Some patterns of cannabis use may presage risk for long-term negative effects. We examined associations between a novel adolescent cannabis misuse scale and early-adult life course outcomes. METHODS: We performed a secondary data analysis of a cohort of Los Angeles, CA high school students from grade 9 through age 21. Participants reported baseline individual demographic and family characteristics at grade 9, adolescent cannabis misuse (8-items) and alcohol misuse (12-items) at grade 10, and outcomes at age 21. We used multivariable regression to model the associations of cannabis misuse scale score with problem substance use (defined as any of: 30-day illegal drug use, 30-day use of another's prescription to get high, hazardous drinking) and several secondary outcomes (behavioral, mental health, academic, social determinants of health), adjusting for covariates. Parallel analyses were conducted for alcohol misuse. RESULTS: The 1,148 participants (86% retention) were 47% male, 90% Latinx, 87% US born, and 40% native English speakers. Approximately 11.4% and 15.9% of participants reported at least one item on the cannabis and alcohol misuse scales, respectively. At age 21, approximately 6.7% of participants reported problem substance use, which was associated with both Cannabis and Alcohol Misuse Scales (OR 1.31, 95%CI[1.16, 1.49] and OR 1.33, 95%CI[1.18, 1.49], respectively). Both scales were similarly associated with outcomes in all four categories. CONCLUSIONS: The Adolescent Cannabis Misuse Scale is a promising tool for identifying early patterns of substance use that predict future negative outcomes and enabling early intervention at a critical period in youth development.