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The majority of new HIV infections in the US occur among sexual minority men (SMM) with older adolescent and emerging adult SMM at the highest risk. Those in relationships face unique HIV prevention challenges. Existing sexual HIV transmission risk interventions for male couples often encounter implementation challenges and engaging younger SMM early in relationships may be particularly difficult. This pilot randomized controlled trial evaluated the acceptibility and feasibility of We Test HIV testing - a behavioral health intervention tailored for younger SMM in realtionships - and generated preliminary estimates of effect size. The intervention comprises two adjunct moduls - video-based communication skills training as well as communication goal setting and planning - delivered in conjunction with routine HIV testing and counseling in individual or dyadic formats. A sample of 69 SMM aged 17 to 24 were recruited online. Following baseline assessment, youth were randomized to receive either the experimental, We Test, intervention or routine HIV testing (the control condition). Follow-up assessments were completed 3 and 6 months post-baseline. Results suggested the study was feasible and the individually delivered format was acceptible. We Test HIV testing was associated with significant improvements in communication skills. In addition, youth who remained in a relationship experienced an increase in communal coping to reduce HIV infection risk and relationship power. While groups did not differ with respect to condomless anal sex with casual partners, these psycho-social constructs (communication, communal coping with HIV prevention, and relationship power) may serve as mediators of intervention effects on sexual risk reduction in a larger study.
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Comunicação , Aconselhamento , Infecções por HIV , Teste de HIV , Parceiros Sexuais , Minorias Sexuais e de Gênero , Humanos , Masculino , Projetos Piloto , Infecções por HIV/prevenção & controle , Infecções por HIV/diagnóstico , Infecções por HIV/psicologia , Adolescente , Adulto Jovem , Minorias Sexuais e de Gênero/psicologia , Parceiros Sexuais/psicologia , Comportamento Sexual , Homossexualidade Masculina/psicologia , Programas de Rastreamento , Estudos de ViabilidadeRESUMO
BACKGROUND: Adolescent hazardous alcohol use is prevalent and has serious short- and long-term consequences. The trial 'Our Choice' examines efficacy, feasibility and acceptability of prevention interventions targeting school, parent, and student levels at Danish high schools. We hypothesize that students in a structural intervention (school and parent levels) reduce hazardous alcohol use and related health behaviors compared to students in an assessment only control group 12 months post baseline; and that adding group-based Motivational Interviewing (group MI) yields further improvements. The study examines the efficacy of interventions targeting multiple levels with the aim of providing novel insights into prevention of adolescent hazardous alcohol use and related health outcomes. METHOD: The study employs a parallel group cluster randomized controlled trial design with three conditions: (1) structural condition targeting school and parent levels, (2) structural condition combined with group MI which also targets the student level, and (3) assessment-only control condition. A participatory approach is used to adapt and develop interventions. Sixteen high schools in Denmark and about N = 3100 first-year students (15-18 years) enrolled in high school in August 2023 will be recruited. Data will be collected via online questionnaires pre-interventions (baseline), 2, 6, 9 and 12 month post baseline and analyzed with generalized linear mixed models. The primary outcome is past month high intensity drinking; secondary outcomes are alcohol use, alcohol-related consequences, well-being, tobacco, and illegal substance use. Feasibility and acceptability will be assessed via surveys (students) and interviews (high school staff) to inform future implementation. DISCUSSION: 'Our Choice' is the first trial to compare the efficacy of a structural intervention targeting school- and parent levels to an intervention targeting these levels and the student level via group MI - on hazardous drinking and related health outcomes among students. Preventing and reducing hazardous alcohol use during adolescence is crucial due to the short- and long-term negative consequences. The tested interventions can be implemented at low cost. The study has significant implications for adolescent health and well-being and has potential to inform evidence-based decisions on alcohol prevention policy, education, and health professions. TRIAL REGISTRATION NUMBER: The trial was retrospectively registered at ClinicalTrials.gov on August 24th, 2023. TRIAL REGISTRATION NUMBER: ID NCT06018389.
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Consumo de Bebidas Alcoólicas , Transtornos Relacionados ao Uso de Substâncias , Adolescente , Humanos , Consumo de Bebidas Alcoólicas/epidemiologia , Consumo de Bebidas Alcoólicas/prevenção & controle , Transtornos Relacionados ao Uso de Substâncias/prevenção & controle , Comportamentos Relacionados com a Saúde , Etanol , Estudantes , Serviços de Saúde Escolar , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
Background: Adolescent drinking has historically been closely linked to social events, and across many countries, students typically increase drinking rates when they transition to upper secondary school. COVID-19-related restrictions offered a unique possibility to examine how changes in social life impact adolescent drinking in the transition to upper secondary school. Aim: The current study investigated changes in hazardous alcohol use, social life and well-being among Danish first-year students (mean age = 16.8 years) during the second wave of the COVID-19 pandemic when restrictions gradually became more intensified. Methods: Data were collected at two time points among 352 Danish students in the first months of upper secondary school (August and November 2020). Multilevel regression models tested changes across time on past 30 days hazardous alcohol use (dependent variables). Separate models tested whether changes in alcohol use were related to gender, social interaction, loneliness and mental health. Results: During increased COVID-19-related restrictions in the second wave, students decreased the frequency and quantity of drinking (number of drinking days and binge drinking), which was associated with attending fewer parties. Students also reported less high-intensity drinking and fewer alcohol-related consequences. Students reported better mental health, but more students were affected by loneliness. Changes in mental health or loneliness were not related to reduced hazardous alcohol use. Conclusion: Our results provide evidence that alcohol use decreased among Danish students transitioning to upper secondary school during the COVID-19 pandemic when restrictions increased, thereby providing support for a close link between adolescent alcohol use and social life; this is an important frame that is relevant when designing interventions to promote healthier and less risky choices throughout the next phase(s) of the pandemic and in general.
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Background: Although a relatively large body of research has identified multiple factors associated with adolescent substance use, less is known about earlier substance-related factors during preadolescence, including curiosity to use substances. The present study examined individual-, peer-, and parent-level domains pertaining to substance use and how these domains vary by sociodemographic subgroups and substance type. Methods: Participants were 11,864 9- and 10-year-olds from the baseline sample of the Adolescent Brain Cognitive Development (ABCD) Study. Youth-reported measures were curiosity to use substances and perceived peer substance use. Parent-reported measures were availability of and rules about substances. Generalized logistic mixed models (GLMM) were used to compare these measures across alcohol, nicotine, and marijuana and across sociodemographic subgroupings (sex, race/ethnicity, household income, and family history of alcohol problems). GLMM was then used to examine predictors of curiosity to use by substance type. Results: The most striking descriptive differences were found between race/ethnicity and income categories (e.g., positive associations between greater income and greater availability of alcohol). In multivariable analyses, greater curiosity to use alcohol was associated with being male, higher household income, perceived peer alcohol use, and easy alcohol availability; greater curiosity to use nicotine was associated with being male, perceived peer cigarette use, easy availability of cigarettes, and no parental rules about cigarette use. Conclusions: This study identified substance use-related individual-, peer-, and parent-level factors among a diverse, national sample. Findings highlight the importance of considering sociodemographic and substance-specific variability and may help identify risk and protective factors preceding adolescent substance use.
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Research regarding daily acute pain and its correlates has primarily been conducted with adolescents who have had major surgery or musculoskeletal pain, restraining efforts towards adapting interventions for adolescents with other sources of acute pain. We explored the trajectories and correlates of pain intensity. Adolescents with an opioid prescription to treat acute pain (N = 157) completed demographic questions, and the PROMIS pediatric depression and anxiety subscales. A 10-day daily diary assessed pain intensity, pain interference, sleep quality, and opioid use. Three trajectories of pain intensity emerged: (1) slow decreases in pain, (2) rapid decreases in pain, and (3) stable or slight increases in pain. Teens with stable pain demonstrated the greatest anxiety levels. Higher sleep quality predicted lower next day pain intensity and pain interference, when controlling for opioid use. Future research should employ intensive longitudinal methodology to further guide intervention development and prevent the transition to chronic pain.
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Dor Aguda , Dor Crônica , Dor Aguda/tratamento farmacológico , Adolescente , Analgésicos Opioides , Ansiedade , Criança , Dor Crônica/tratamento farmacológico , Humanos , Medição da DorRESUMO
For some, substance use during adolescence may be a stepping stone on the way to substance use disorders in adulthood. Risk prediction models may help identify adolescent users at elevated risk for hazardous substance use. This preliminary analysis used cross-sectional data (n = 270, ages 13-18) from the baseline dataset of a randomized controlled trial intervening with adolescent alcohol and/or cannabis use. Models were developed for jointly predicting quantitative scores on three measures of hazardous substance use (Rutgers Alcohol Problems Index, Adolescent Cannabis Problem Questionnaire, and Hooked on Nicotine Checklist) based on personal risk factors using two statistical and machine learning methods: multivariate covariance generalized linear models (MCGLM) and penalized multivariate regression with a lasso penalty. The predictive accuracy of a model was evaluated using root mean squared error computed via leave-one-out cross-validation. The final proposed model was an MCGLM model. It has eleven risk factors: age, early life stress, age of first tobacco use, age of first cannabis use, lifetime use of other substances, age of first use of other substances, maternal education, parental attachment, family cigarette use, family history of hazardous alcohol use, and family history of hazardous cannabis use. Different subsets of these risk factors feature in the three outcome-specific components of this joint model. The quantitative risk estimate provided by the proposed model may help identify adolescent substance users of cannabis, alcohol, and tobacco who may be at an elevated risk of developing hazardous substance use.
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Justice-involved youth are at a higher risk of negative outcomes from sexual activity and alcohol use relative to their non-justice involved peers. In the current study, we tested the extent to which variability in neurocognitive response (i.e., activation in the right superior parietal lobule; rSPL) during a risky decision-making task moderated the success of a sexual risk reduction intervention. In a cluster randomized trial blocked by gender, justice-involved adolescents (N = 269) first completed a risky decision-making task during a magnetic resonance imaging (MRI) session, then were assigned to an information-only control (GINFO) or sexual risk reduction intervention incorporating alcohol risk reduction content (GPI + GMET) and then re-contacted every three months for one year. Youth in the GPI + GMET intervention reported less sexual risk behavior 12 months after intervention than those in the control. Although neurocognitive activation was associated with sexual risk behavior, it did not moderate intervention outcomes. This risk-reduction intervention appears to work equally well across a range of neurocognitive responses.
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Comportamento do Adolescente , Consumo de Bebidas Alcoólicas , Comportamento de Redução do Risco , Comportamento Sexual , Adolescente , Humanos , Assunção de RiscosRESUMO
Couples HIV Testing and Counseling (CHTC) is now a standard of care for partnered sexual minority men. While adolescent sexual minority men (ASMM; ages 15-19) face disproportionate HIV risk, the emergent nature of relationships and communication skills may present challenges to accessing and engaging in CHTC. This study utilized qualitative data from 28 ASMM recruited in 4 urban centers in the USA during the formative stage of Adolescent Trials Network study ATN-156. Participants were cis-male, HIV-negative, and in a relationship with a similarly-aged cis-male partner. Thematic analysis indicated low and high levels of commitment were barriers to CHTC. Concerns about caregiver attitudes towards HIV testing were salient. Adolescents' perception of structural barriers highlighted reliance on caregiver resources, which limited access to sexual health services. Prevention programming must address structural barriers to access encountered by adolescents. ASMM in relationships may benefit from programming that includes options for individual and dyadic participation.
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Sorodiagnóstico da AIDS , Comunicação , Aconselhamento/métodos , Infecções por HIV/diagnóstico , Parceiros Sexuais/psicologia , Minorias Sexuais e de Gênero , Adolescente , Infecções por HIV/prevenção & controle , Infecções por HIV/psicologia , Teste de HIV , Acessibilidade aos Serviços de Saúde , Humanos , Masculino , Aceitação pelo Paciente de Cuidados de Saúde , Pesquisa Qualitativa , População Urbana , Adulto JovemRESUMO
Health Psychology has received numerous papers over the past several months on topics related to the COVID-19 pandemic. Many of them concern depression, anxiety, stress, or other forms of distress in the general population or in health care workers. We have received far fewer papers on COVID-related health behaviors and health communications-factors that have played central roles in the spread of the pandemic and that are major topics in health psychology. Our experience is consistent with the published scientific literature on the pandemic. A Medline search that we conducted in late September yielded over 23,000 English-language articles pertaining to COVID-19. Over 1,400 of them concerned topics that are within the scope of Health Psychology. As shown in Table 1, COVID-related mental disorders comprised the largest category. Many other studies concerned other forms of stress or emotional distress. At least 248 articles addressed the profound ethnic and racial disparities in COVID-19 infection and death rates and in access to health care that are accentuating longstanding health inequities; 22 (9%) of these articles addressed behavioral or psychosocial aspects of COVID-19 health disparities. Thus, the literature on the behavioral and psychosocial aspects of the pandemic has been dominated, so far at least, by research on stress or distress. Fewer reports have been published so far on critical COVID-related health behaviors, health communication, or health disparities. (PsycInfo Database Record (c) 2020 APA, all rights reserved).
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Medicina do Comportamento , COVID-19 , Controle de Doenças Transmissíveis , Comportamentos Relacionados com a Saúde , Comunicação em Saúde , Pessoal de Saúde/psicologia , Transtornos Mentais/psicologia , Ansiedade/psicologia , Pesquisa Comportamental , Depressão/psicologia , Desinfecção das Mãos , Humanos , Máscaras , Pandemias , Publicações Periódicas como Assunto , Distanciamento Físico , Angústia Psicológica , SARS-CoV-2 , Estresse Psicológico/psicologiaRESUMO
PURPOSE OF REVIEW: This review examines how research focused on treatment for opioid use in perinatal populations and preventive interventions for postpartum psychopathology have remained separate, despite significant overlap. RECENT FINDINGS: Guidelines for best practice in caring for pregnant women with opioid use disorder suggest the use of medication-assisted treatment with additional comprehensive care, including behavioral and mental health interventions. However, intervention research often mutually excludes these two populations, with studies of behavioral interventions for opioid use excluding women with psychopathology and research on preventive interventions for postpartum psychopathology excluding women who are substance using. SUMMARY: There is a limited evidence-base to inform the selection of appropriate preventive interventions for pregnant women with opioid use disorder that can address opioid use and/or treatment adherence and concurrent mental health risks. We argue it is critical to integrate research on pregnant women who are opioid using and preventive perinatal mental health interventions to catalyze pivotal change in how we address the opioid epidemic within this growing population.
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The 21-site Adolescent Brain Cognitive Development (ABCD) study provides an unparalleled opportunity to characterize functional brain development via resting-state functional connectivity (RSFC) and to quantify relationships between RSFC and behavior. This multi-site data set includes potentially confounding sources of variance, such as differences between data collection sites and/or scanner manufacturers, in addition to those inherent to RSFC (e.g., head motion). The ABCD project provides a framework for characterizing and reproducing RSFC and RSFC-behavior associations, while quantifying the extent to which sources of variability bias RSFC estimates. We quantified RSFC and functional network architecture in 2,188 9-10-year old children from the ABCD study, segregated into demographically-matched discovery (Nâ¯=â¯1,166) and replication datasets (Nâ¯=â¯1,022). We found RSFC and network architecture to be highly reproducible across children. We did not observe strong effects of site; however, scanner manufacturer effects were large, reproducible, and followed a "short-to-long" association with distance between regions. Accounting for potential confounding variables, we replicated that RSFC between several higher-order networks was related to general cognition. In sum, we provide a framework for how to characterize RSFC-behavior relationships in a rigorous and reproducible manner using the ABCD dataset and other large multi-site projects.
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Mapeamento Encefálico/métodos , Encéfalo/patologia , Imageamento por Ressonância Magnética/métodos , Criança , Feminino , Humanos , Individualidade , MasculinoRESUMO
OBJECTIVE: In the United States, Hispanic adolescents are at elevated risk for negative outcomes related to risky sexual behavior. To evaluate potential protective factors for this group, we examined the fit of the Hispanic Paradox for sexual behavior among high-risk youth and the moderating role of parent monitoring. METHOD: We enrolled 323 justice-involved Hispanic youth (73% male; mean age 16 years), and measured generational status, parent monitoring (monitoring location, who children spend time with outside of school, family dinner frequency), and sexual risk behavior. RESULTS: There were no main effects for generational status on sexual behavior. Parent monitoring of location moderated the relationship between generational status and sexual behavior, such that greater monitoring of location was associated with less risky sexual behavior, but only for youth second generation and above. CONCLUSIONS: Rather than direct evidence supporting the Hispanic Paradox, we found a more nuanced relationship for generational status in this sample.
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Comportamento do Adolescente/psicologia , Hispânico ou Latino/psicologia , Poder Familiar/psicologia , Assunção de Riscos , Comportamento Sexual/psicologia , Adolescente , Feminino , Hispânico ou Latino/estatística & dados numéricos , Humanos , Masculino , Pais/psicologia , Comportamento Sexual/estatística & dados numéricos , Estados UnidosRESUMO
OBJECTIVE: While representing only 25% of the sexually active population, 50% of all new sexually transmitted infections occur among young people mostly because of inconsistent condom use. Critically, the majority of adolescent sexual activity takes place in the context of romantic relationships; thus, it is important to understand how relationship factors may influence decision making about the use of protection. METHODS: We used a mixed-method approach to investigate the extent to which relationship length, degree of trust or love in the relationship, and frequency of intercourse influence both perceptions of the probability of condom use and self-reported condom use in the context of relationships among a diverse sample of high-risk adolescents (age 12-19 yr). RESULTS: Participants were least likely to use condoms if they were in relationships with high trust or love and high frequency of intercourse. Importantly, sexual experience status was a strong moderator of primary effects. CONCLUSION: The perspective of motivated cognition provides a useful theoretical framework to better understand adolescent decision making about condom use, particularly for sexually experienced youth.
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Comportamento do Adolescente/psicologia , Preservativos , Tomada de Decisões/fisiologia , Comportamento Sexual/psicologia , Parceiros Sexuais/psicologia , Confiança/psicologia , Adolescente , Adulto , Criança , Feminino , Humanos , Masculino , Adulto JovemRESUMO
RATIONALE: It is well established that the rewarding effects of alcohol are modulated by the mesolimbic dopaminergic system. Olanzapine, a D2 dopamine antagonist, has been shown to reduce alcohol craving and consumption. OBJECTIVE: To clarify whether olanzapine has clinical utility in the treatment of alcohol dependence, a 12-week, double-blind, and randomized clinical trial was conducted. METHODS: One hundred twenty-nine treatment-seeking alcohol-dependent adults were randomly assigned to 12 weeks of olanzapine (5 vs. 2.5 mg) or placebo. Outcomes examined were average drinks per drinking day (DDD), proportion of drinking days (PDD) to total days in treatment, alcohol craving, and impaired control over alcohol use. Mixed models were used to examine medication effects during the course of treatment on specified outcomes. RESULTS: All of the analyses indicated a main effect for time, such that there were reductions in alcohol use and craving and an increase in control over alcohol use across treatment conditions. Dose-response analyses indicated that, in comparison to placebo, participants in the 5 mg group experienced reduced craving for alcohol and participants in the 2.5 mg group decreased in PDD and increased in their control over alcohol use. Better control over alcohol use remained significant 6 months post-treatment for the 2.5 mg group. Subjective experiences of the medication suggest that 2.5 and 5 mg were equally well tolerated. CONCLUSIONS: Results provide some support for the notion that dosage is an important consideration in relation to effectiveness; however, the cost-benefit balance does not support the clinical utility of olanzapine in treating alcohol dependence.
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Alcoolismo/diagnóstico , Alcoolismo/tratamento farmacológico , Antipsicóticos/administração & dosagem , Benzodiazepinas/administração & dosagem , Adulto , Fissura/efeitos dos fármacos , Fissura/fisiologia , Relação Dose-Resposta a Droga , Método Duplo-Cego , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Olanzapina , Resultado do TratamentoRESUMO
BACKGROUND: A large proportion of adolescents drink alcohol, with many engaging in high-risk patterns of consumption, including binge drinking. Here, we systematically review and synthesize the existing empirical literature on how consuming alcohol affects the developing human brain in alcohol-using (AU) youth. METHODS: For this systematic review, we began by conducting a literature search using the PubMED database to identify all available peer-reviewed magnetic resonance imaging (MRI) and functional magnetic resonance imaging (fMRI) studies of AU adolescents (aged 19 and under). All studies were screened against a strict set of criteria designed to constrain the impact of confounding factors, such as co-occurring psychiatric conditions. RESULTS: Twenty-one studies (10 MRI and 11 fMRI) met the criteria for inclusion. A synthesis of the MRI studies suggested that overall, AU youth showed regional differences in brain structure as compared with non-AU youth, with smaller grey matter volumes and lower white matter integrity in relevant brain areas. In terms of fMRI outcomes, despite equivalent task performance between AU and non-AU youth, AU youth showed a broad pattern of lower task-relevant activation, and greater task-irrelevant activation. In addition, a pattern of gender differences was observed for brain structure and function, with particularly striking effects among AU females. CONCLUSIONS: Alcohol consumption during adolescence was associated with significant differences in structure and function in the developing human brain. However, this is a nascent field, with several limiting factors (including small sample sizes, cross-sectional designs, presence of confounding factors) within many of the reviewed studies, meaning that results should be interpreted in light of the preliminary state of the field. Future longitudinal and large-scale studies are critical to replicate the existing findings, and to provide a more comprehensive and conclusive picture of the effect of alcohol consumption on the developing brain.
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Consumo de Bebidas Alcoólicas/patologia , Encéfalo/patologia , Imageamento por Ressonância Magnética , Adolescente , Consumo de Bebidas Alcoólicas/psicologia , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Masculino , Assunção de RiscosRESUMO
Justice-involved youth have high rates of marijuana use. Less is known about what may drive these rates, particularly when justice-involved youth return to the community. One factor that has been implicated is continued detention involvement. Yet, it is unknown how this factor may influence marijuana use trajectories. Using longitudinal growth curve modeling, the researchers evaluated the association between continued detention involvement and marijuana use trajectories in two large, ethnically diverse samples of community-based, justice-involved youth. Across both samples, marijuana use decreased over time for youth with continued detention involvement but did not change for youth without continued detention involvement. These findings underscore the importance of attending to the influence of detention involvement in community-based, justice-involved adolescents' marijuana use trajectories. This study also highlights the importance of coordinating prevention/intervention programming for justice-involved youth once they are in the community.
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Comportamento do Adolescente , Delinquência Juvenil/estatística & dados numéricos , Abuso de Maconha/epidemiologia , Prisões/estatística & dados numéricos , Adolescente , Fatores Etários , Feminino , Humanos , Masculino , Abuso de Maconha/etnologia , Grupos Raciais/estatística & dados numéricos , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores Sexuais , Fatores SocioeconômicosRESUMO
Although numerous studies provide general support for the importance of genetic factors in the risk for alcohol use disorders (AUDs), candidate gene and genome-wide studies have yet to identify a set of genetic variations that explain a significant portion of the variance in AUDs. One reason is that alcohol-related phenotypes used in genetic studies are typically based on highly heterogeneous diagnostic categories. Therefore, identifying neurobiological phenotypes related to neuroadaptations that drive the development of AUDs is critical for the future success of genetic and epigenetic studies. One such neurobiological phenotype is the degree to which exposure to alcohol taste cues recruits the basal ganglia, prefrontal cortex, and motor areas, all of which have been shown to have a critical role in addictive behaviors in animal studies. To that end, this study was designed to examine whether cue-elicited responses of these structures are associated with AUD severity in a large sample (n=326) using voxelwise and functional connectivity measures. Results suggested that alcohol cues significantly activated dorsal striatum, insula/orbitofrontal cortex, anterior cingulate cortex, and ventral tegmental area. AUD severity was moderately correlated with regions involved in incentive salience such as the nucleus accumbens and amygdala, and stronger relationships with precuneus, insula, and dorsal striatum. The findings indicate that AUDs are related to neuroadaptations in these regions and that these measures may represent important neurobiological phenotypes for subsequent genetic studies.
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Alcoolismo/genética , Alcoolismo/metabolismo , Etanol/administração & dosagem , Fenótipo , Índice de Gravidade de Doença , Adulto , Alcoolismo/psicologia , Química Encefálica/efeitos dos fármacos , Química Encefálica/genética , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Risco , Inquéritos e Questionários , Adulto JovemRESUMO
Evidence for shared heritable influences across domains of substance use suggests that some genetic variants influence broad risk for externalizing behaviors. Theories of externalizing psychopathology also suggest that genetic liability for substance use manifests as temperamental risk factors, particularly those related to behavioral disinhibition, during adolescence. The cholinergic muscarinic receptor 2 gene (CHRM2) is a promising candidate for studying genetic influences on broad-based risk for externalizing traits. This study examined a candidate CHRM2 polymorphism (rs1455858) in relation to substance use and personality measures of disinhibition in a sample of high-risk adolescents (n = 124). Bivariate analyses and structural equation modeling (SEM) evaluated associations of rs1455858 with measures of drug involvement (alcohol, tobacco and marijuana) and disinhibition (indexed by impulsivity and sensation seeking scores). Bivariate analyses showed significant associations of CHRM2 with several behavioral phenotypes. In SEM analyses CHRM2 related significantly to latent measures of substance use and disinhibition; additionally, disinhibition mediated the association of CHRM2 with substance use. These results suggest that CHRM2 variants are potentially relevant for adolescent substance use and that temperamental risk factors could contribute to these associations.
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Receptor Muscarínico M2/genética , Assunção de Riscos , Transtornos Relacionados ao Uso de Substâncias/genética , Adolescente , Feminino , Estudos de Associação Genética , Genótipo , Humanos , Comportamento Impulsivo/genética , Comportamento Impulsivo/psicologia , Masculino , Inventário de Personalidade , Polimorfismo de Nucleotídeo Único/genética , Transtornos Relacionados ao Uso de Substâncias/psicologiaRESUMO
Crack and cocaine use among adults has been associated with co-occurring psychiatric disorders as well as other drug use and unprotected sex. However, this issue is relatively unstudied in adolescents. This study collected data from 282 adolescents (mean age=14.9 years) treated in intensive psychiatric treatment settings to understand the relationship between crack/cocaine use and HIV risk. Thirteen percent of youth reported ever using crack or cocaine. Use was not associated with age, gender, race/ethnicity or SES. After controlling for known factors that influence unprotected sex, the odds that those with a history of crack/cocaine use engaged in inconsistent condom use was six times greater than that for those youth who did not ever use. Thus, crack/cocaine use is prevalent even among younger adolescents with psychiatric disorders who are not in drug treatment. Its use is associated with high rates of sexual and other risk behaviors. A history of use should alert clinicians to a wide variety of possible behavioral risks. These results can also inform future adolescent HIV prevention intervention development.