Proximal and time-varying effects of cigarette, alcohol, marijuana and other hard drug use on adolescent dating aggression

Predictive Associations Between Adolescent Profiles of Violent and Nonviolent Deviant Behavior With Convictions in Adulthood

This study examines how multivariate trajectory patterns of overt and relational peer and dating violence perpetration, alcohol use, and nonviolent deviant behavior during high school predict convictions in adulthood. Adolescent data are from an accelerated cohort design study that spanned four waves in 2003-2005. In 2019, conviction records were obtained for a random subsample of 1,579 individuals from the original study. We identified latent classes that were jointly characterized by distinct behavioral trajectories and adult conviction status, and described the demographic and psychosocial profiles of each class. The best-fitting model comprised four trajectory classes: Low Deviance (44%), Moderate Stable Deviance (40%), Increasing Deviance (8%), and Dating Violence Perpetrators (8%). Adolescents whose deviance increased during adolescence had substantially higher risk of convictions, including violent convictions, than all other groups. Classes were differentiated by gender, household structure, parental education, school bonding, grades, emotional dysregulation, sensation-seeking, family conflict, and prosocial values. The Increasing Deviance class was predominantly male, had an elevated probability of coming from a single-parent household and of having parents with low education, but values on psychosocial indicators were not extreme. Dating Violence Perpetrators were also more likely to come from a single-parent household, but their parents tended to have more education. This group was the most extreme on several psychosocial indicators that indicate low school and family bonds, and poor emotional regulation. The implications of these patterns in relation to interactional and strain theories, theories of cognitive maturation, and theories of social bonds and social control are discussed.

Substance Abuse Associated with Aggressive/Violent Behaviors in Psychiatric Outpatients and Related Psychotropic Prescription

Psychiatric disorders with substance abuse are considered the leading causes of most violent and aggressive behaviors in the general population. This study was aimed to assess the impact of substance abuse and the therapeutic approaches adopted by psychiatrists in aggressive vs non-aggressive outpatients (n = 400) attending community-based psychiatric services and recruited over a 3-year period. Clinical and therapeutic variables were collected from medical records and the Modified Overt Aggression Scale (MOAS) was used to assess any aggressive/violent behavior. Violent behaviors were significantly higher in alcohol and substance abusers compared to non-abusers (p < 0.01), except for heroin abusers. Mean weighted MOAS score was significantly higher in patients taking antipsychotics (p < 0.005). The administration of Haloperidol, Zuclopenthixol, and Clozapine was more frequent in aggressive than in non-aggressive patients. The most frequently administered drug in these patients was Haloperidol (23.91%), with a higher mean daily dosage in violent vs non-violent patients. Our results confirm the well-established relationship between substance abuse and violent behaviors in psychiatric inpatients also within outpatient community services. Observed rates of most frequently prescribed antipsychotics to aggressive patients did not show any preference for newer generation compounds, with clinicians operating in the community setting likely being in need for further evidence and specific training to support their treatment choice.

Polydrug Use and Dating Violence Among Emerging Adults

We examined sociodemographic and psychosocial risk factors that moderate the (poly) substance use and dating violence victimization and perpetration relationship among emerging adults. Using an ethnically diverse sample (N = 698), we used latent class analyses to identify mutually exclusive groups based on monthly and past-year substance use. We then examined these groups as they relate to dating violence victimization and perpetration and the moderating effect of various risk factors. Five classes were identified based on substance use patterns: (a) Regular Alcohol use, (b) Polysubstance use, (c) Heavy Alcohol and Marijuana use, (d) Mild Alcohol use, and (e) Occasional Alcohol and Marijuana use classes. Participants in the Polysubstance use class were the most likely to perpetrate dating violence followed by Heavy Alcohol and Marijuana use, Occasional Alcohol and Marijuana use, Regular Alcohol, and Mild Alcohol use classes. Similarly, participants in the Polysubstance use class were the most likely to be victims of dating violence followed by Occasional Alcohol and Marijuana, Heavy Alcohol and Marijuana, Regular Alcohol, and Mild Alcohol use classes. Depending on substance use class, gender, ethnicity, socioeconomic status, history of dating violence, and trauma symptoms differentially influenced dating violence perpetration and victimization at 1-year follow-up. Our findings support the need to comprehensively address dating violence among emerging adults. Intimate partner violence prevention and intervention programs may benefit from targeting emerging adults who misuse substances and incorporating substance use interventions into dating violence prevention efforts.

Associations between Longitudinal Patterns of Substance Use and Anxiety and Depression Symptoms among a Sample of Canadian Secondary School Students

The objective of this study is to examine the longitudinal associations between latent classes of substance use and anxiety and depression scores among youth who use substances. This study uses data from three waves (Wave 1: 2017/18, Wave 2: 2018/19, and Wave 3: 2019/20) of the COMPASS study. Students in grades 9 and 10 who reported substance use at baseline (n = 738) report their substance use (alcohol, cannabis, cigarettes, and e-cigarettes) and anxiety and depression symptoms at each wave. A Repeated Measures Latent Class Analysis (RMLCA) is used to determine substance use classes, and mixed models are used to examine the associations between substance use classes and anxiety and depression. We identify three classes of substance use: (1) occasional alcohol and e-cigarette use, (2) escalating poly-substance use, and (3) consistent poly-substance use. After controlling for relevant covariates, consistent poly-substance use is associated with depression (Female OR: 1.24 [95%CI: 0.46, 2.02]; Male OR 1.13 [95%CI: 0.38, 1.87]) but not anxiety. Escalating poly-substance use is associated with depression among males (OR 0.72 [95%CI: 0.10, 1.33]). These findings should be taken into consideration when creating prevention programming and treatment strategies for adolescents. Substance use programming should be comprehensive, consider multiple substances, and be cognizant of symptoms of mental illness, particularly depression.

Association of Addictive Substance Use with Polyvictimization and Acceptance of Violence in Adolescent Couples

Theoretical framework: The objectives of this study were to analyse the possible influence that some variables such as substance use (alcohol and marijuana) might have on relevant aspects related to violence in adolescent dating (victimization, frequency of violence and acceptance of violence). Methods: The sample included 2577 adolescents between the ages of 14 and 18. The instruments used were two questionnaires. The first identified and analysed the types and frequency of violence experienced by the victims, and their acceptance of violence. The second analysed the use of alcohol and marijuana in adolescents. Results: The results indicate that victims frequently take on the role of polyvictims, suffering aggression in up to more than five different forms at the same time. Furthermore, it was found that this phenomenon is precipitated by substance use, the frequency of abuse and the acceptance of violence in a cycle of mutual interaction.

Risk Behaviours Associated with Dating and Relationship Violence among 11-16 Year Olds in Wales: Results from the 2019 Student Health and Wellbeing Survey

(1) Background: This study examines the associations between risk behaviours and adolescent emotional and physical dating and relationship violence (DRV) victimisation and perpetration, and how these vary by gender. The risk behaviours explored include bullying, cyberbullying, sexting, alcohol, and cannabis use; (2) Methods: Cross-sectional self-report data from the School Health Research Network (SHRN) 2019 Student Health Wellbeing (SHW) survey of 48,397 students aged 11–16 from 149 schools across Wales were analysed using single and multiple-behaviour logistic regression models to explore the associations between each risk behaviour and emotional and physical DRV victimisation and perpetration; (3) Results: Bivariate analyses revealed a statistically significant association between DRV and all risk behaviours. In multivariate analyses, students who reported bullying, cyberbullying, sexting, and substance use, compared to those that had not, had significantly higher odds of experiencing and perpetrating emotional and physical DRV; and (4) Conclusions: Future studies on DRV should consider a mixed-methods approach to explore the context in which DRV and risk behaviours interrelate. Results from this study indicate the possibility that prevention and intervention programmes in school settings that seek to develop healthy school environments and peer-to-peer relationships, could inadvertently reduce the occurrence of future DRV and associated risk behaviours.

Emancipated Foster Youth and Intimate Partner Violence: An Exploration of Risk and Protective Factors

Due to their high rates of parental maltreatment and violence exposure, youth in the foster care system are considered particularly vulnerable to experiencing intimate partner violence (IPV) in adolescence and young adulthood. Those who have emancipated from foster care may be at a heightened risk, as they are significantly more likely to struggle in a variety of critical domains (i.e., mental health, substance use, and delinquency). This longitudinal study is the first to explore the impact of demographic, individual, family, and foster care system factors on IPV involvement for foster care alumni at age 23/24. Analyses were conducted on three waves of quantitative data from the Midwest Evaluation of the Adult Functioning of Former Foster Youth (the Midwest Study). We find that approximately 21% of the young adults in our sample were involved in some type of IPV at age 23/24, with bidirectional violence the most commonly reported form. Males were more likely than females to report IPV victimization, whereas females were more likely than males to report IPV perpetration and bidirectional violence. Young adults who reported parental IPV prior to foster care entry were more likely to be involved in bidirectionally violent partnerships than nonviolent partnerships in young adulthood, as were young adults who reported neglect by a foster caregiver and those who reported greater placement instability while in the foster care system. Anxiety at baseline increased the odds of IPV perpetration at age 23/24, and posttraumatic stress disorder (PTSD) at baseline decreased the odds of IPV perpetration at age 23/24. Understanding the characteristics and experiences that place these young adults at risk for IPV will allow for more effective and targeted prevention efforts.

Association Between the Use of Cannabis and Physical Violence in Youths: A Meta-Analytical Investigation

OBJECTIVE

The aim of this meta-analysis was to investigate the extent to which cannabis use among youths is associated with the risk of perpetrating physical violence.

METHODS

Searches were conducted in PubMed, PsycINFO, Web of Science, and Google Scholar for articles published from the inception of each database to July 2019. All studies that examined both cannabis use and the perpetration of physical violence in a sample of youths and young adults <30 years old were included. The meta-analysis was performed with a random-effects model. Risk of publication bias was assessed with Egger's test. Guidelines from the Meta-Analysis of Observational Studies in Epidemiology were followed.

RESULTS

After screening 11,348 potential studies, 30 study arms were included, yielding a total of 296,815 adolescents and young adults. The odds ratio for the pooled studies was 2.11 (95% CI=1.64, 2.72). The pooled odds ratios were 2.15 (95% CI=1.58, 2.94) and 2.02 (95% CI=1.26, 3.23) for the cross-sectional and longitudinal studies, respectively. Preliminary evidence suggests that the risk of violence was higher for persistent heavy users (odds ratio=2.81, 95% CI=1.68, 4.74) compared with past-year users (odds ratio=2.05, 95% CI=1.5, 2.8) and lifetime users (odds ratio=1.94, 95% CI=1.29, 2.93). The odds ratio for unadjusted studies was 2.62 (95% CI=1.89, 3.62), and for studies using odds ratios adjusted for potential confounding factors, 2.01 (95% CI=1.57, 2.56).

CONCLUSIONS

These results demonstrate a moderate association between cannabis use and physical violence, which remained significant regardless of study design and adjustment for confounding factors (i.e., socioeconomic factors, other substance use). Cannabis use in this population is a risk factor for violence.

Teen-dating violence: conception of adolescents in a Brazilian metropolis

Background:

Teen-dating violence (TDV) can lead to health problems for those involved, especially females, including homicides and is predictive of intimate partner violence in adulthood.

Methods:

To analyze the adolescents' perception of definitions, justifications and consequences of TDV, a qualitative study through 13 focus groups with 132 high school students from public and private schools of Rio de Janeiro city, including 70 girls and 62 boys was conducted. We followed a guide with questions about interpersonal violence and participants completed a self-administered questionnaire on socio-demographic data. The data analysis included reading and comprehension of the textual data; coding of the reports according to the emerged categories; identification of the meanings attributed by the subjects to the questions raised; comparative dialogue with literature; and elaboration of interpretative synthesis.

Results:

Most adolescents affirmed that TDV is not justifiable. However, in practice, they found it acceptable in certain situations. The narratives of the boys were based on the role of the perpetrator and the girls on that of the victim. Violence occurs when the man feels his power challenged and is influenced by situations of violence experienced in his own family as victims or witnesses. The TDV consequences are for the women and include, in addition to physical and psychological damage, relational problems in other spheres such as family, friends and school. The experience of violence was more common among public school students.

Conclusions:

The adolescents’ narratives reflect the gender patterns of society in which violence results from inequality of power. The data of this study offer subsidies to policies on TDV prevention and its consequences. They can contribute to training primary care professionals to identify on clinical consultations signs and symptoms of violence and to develop interventions to reduce the health problems of victims.

Relations among Externalizing Behaviors, Alcohol Expectancies and Alcohol Use Problems in a Multi-Ethnic Sample of Middle and High School Students

BACKGROUND

Alcohol expectancies and externalizing behaviors, that is, aggression and rule-breaking behaviors, are associated with underage alcohol use. The interactive influence of these risk factors on problem alcohol use among minority adolescents is investigated in the present study.

OBJECTIVES

This study examined the unique and interactive influences of alcohol expectancies and externalizing problems on specific measures of adolescents' (a) past three-month binge drinking episodes and (b) negative consequences of alcohol use.

METHODS

Cross-sectional self-report data were collected in 2014 via tablet-based computerized assessments from a predominantly minority sample of 762 (404 females, Mage = 13.73 years, SDage =1.59) 6th, 8th, and 10th grade students recruited from public middle and high schools in Miami-Dade County, FL and Prince George's County, MD. Students completed surveys on tablets in school settings regarding alcohol expectancies, expectancy valuations, externalizing problem behaviors, past 3-month binge drinking episodes, and experiences of alcohol-related negative consequences.

RESULTS

Zero-inflated negative binomial regressions indicated: (1) older adolescents were more likely to report binge drinking; and (2) a significant main effect for externalizing problem behaviors on binge use. Logistic regressions indicated (1) older adolescents were more likely to endorse an alcohol-related negative consequence and (2) the interaction between positive alcohol expectancies and externalizing behaviors was associated with endorsing an alcohol-related negative consequence.

CONCLUSIONS

Engaging adolescents who exhibit serious externalizing behaviors and report positive alcohol expectancies via developmentally appropriate, tailored interventions is one feasible strategy to address escalation of binge alcohol use and related negative consequences among minority youth.

Poly-Strengths and Peer Violence Perpetration: What Strengths Can Add to Risk Factor Analyses

Adolescence is a high-risk time for perpetration of different forms of peer-based violence including harassment, bullying, and sexual assault. Research documents a number of important risk factors but less understood are protective factors like sense of mattering or how combinations of strengths may reduce perpetration risk. The current study examined how protective factors (i.e., positive social norms), including a diversity of strengths (termed poly-strengths), influenced the perpetration of harassment, bullying, and sexual assault for young people, while accounting for the use of alcohol both cross-sectionally and over time. Youth (N = 2232, 52.6% female) in grades 7-10 enrolled in a study using active parental consent (53% response rate) and completed online surveys in school that asked about bullying and harassment, alcohol use, positive social norms related to violence prevention, and a composite of intra-personal strengths. Follow-up surveys took place 6 months later (N = 2150). Logistic regression analyses examined how social norms and poly-strengths influenced odds of perpetration after accounting for demographic variables and the risk factor of alcohol use. Use of alcohol increased the odds of perpetrating all forms of violence. Strengths were significantly related to lower perpetration at Time 1 but not Time 2. Positive social norms reduced perpetration at both time points. The findings suggest adolescent perpetration of bullying, harassment, and sexual violence is lower in the presence of positive social norms over time and more proximally, in the presence of a diverse strengths portfolio. Prevention efforts that incorporate positive social norms and alcohol reduction strategies may reduce peer violence.

Causes and consequences of adolescent dating violence: a systematic review

Background:

Adolescent dating violence (ADV) is highly prevalent and can have serious health consequences, including homicides, and be a predictor of intimate partner violence in adulthood. This review aims to systematize the knowledge produced in recent empirical investigations in health that focus on the causes and consequences of ADV to subsidize new research and prevention programs.

Methods:

Review of studies published in PubMed over the last five years through MeSH Database: “Intimate Partner Violence” AND “Adolescent” NOT “prevention and control” NOT “Adult”.

Results:

We analyzed 35 papers, of which 71.4% were developed in the USA. Some studies have shown prevalence greater than 50% in both genders, both as victims and perpetrators, with more serious consequences for females. Three main thematic cores were identified in the studies: ADV-related vulnerabilities, circularity of violence and ADV-associated health problems. Data indicate that ADV is deep-seated in the patriarchal culture and is more frequent in connection with racism, heterosexism and poverty. It occurs in a circular way and is linked to other forms of violence in different contexts (family, school, community and social media). It is associated with health problems such as depression, anxiety, low self-esteem, alcohol and drugs abuse and unprotected sex.

Conclusions:

The knowledge produced in the studies reviewed reveals the urgency and importance of implementing early preventive actions in schools, involving families and the community. These should focus on the deconstruction of current cultural gender patterns, based on their historical origin, in order to support emancipatory and liberating pedagogical approaches.

Longitudinal Associations of Binge Drinking with Interpersonal Violence Among Adolescents

Binge drinking may be associated with adolescents' experience of multiple types of interpersonal violence perpetration and victimization, and if so, could be a malleable intervention target to prevent interpersonal violence. The current article explores the between- and within-person associations of binge drinking (i.e., 4/5 or more drinks in a row for girls/boys) with interpersonal violence among adolescents (N = 1322, 50.3% girls/women, 88.9% White/non-Hispanic, 85.9% heterosexual, 18.6% free/reduced lunch, aged 13-19) using a longitudinal design (three waves of data collection across more than a year). Overall, adolescents who engaged in binge drinking at more time points were more likely to perpetrate sexual harassment and stalking, and more likely to be victims of stalking and dating violence. At time points when adolescents had engaged in binge drinking in the past month, they were more likely to perpetrate dating violence, less likely to perpetrate stalking, and more likely to be sexual harassment victims. Addressing binge drinking in prevention programs may reduce some forms of interpersonal violence.

A latent class analysis of the co-occurrence of sexual violence, substance use, and mental health in youth

Purpose: The purpose of this study was to understand co-occurrence of sexual violence, substance use, and mental health in youth and see if there are differences in experiences among sexual identities, races, and genders. Methods: The 2017 Youth Risk Behavior Survey sampled 14,638 high school students. Latent class analysis was used to understand the relationship between incidence of sexual violence, substance use, and depression and suicidality in a nationally representative sample. The model controlled for demographic and bullying covariates. Results: A four-class solution provided optimal fit. Classes were low risk (51.8%); low violence, frequent substance use, and high depression and suicidal ideation (29.7%); experienced violence and moderate mental health issues(5.1%); and some violence, high substance use, and high depression and suicidal ideation (13.4%). Youth who identified as sexual minority youth were almost 2.5-5 times more likely to be in the three higher risk classes than their heterosexual peers. Those who identified as "I don't know" were almost 3 times more likely to be in the three higher risk classes than heterosexual youth. Multiracial youth had higher likelihood of being in the three riskier classes compared to Caucasian youth. Females were 2.5 and 3 times more likely to be in the low violence and some violence classes compared to males. Conclusion: The study's finding distinct classes of co-occurring behavioral and mental health outcomes fill gaps in the current literature and informs practitioners that LGB youth and bi/multiracial youth were at an elevated risk of co-occurring victimization, substance use, and mental health problems.

Effects of Excessive Alcohol Use on Antisocial Behavior Across Adolescence and Early Adulthood

OBJECTIVE

Antisocial behavior (ASB) decreases with age in most of the population; however, excessive alcohol use can inhibit the desistance process. This study investigated whether excessive early drinking might slow a young person's overall pattern of crime desistance compared with that of others ("between-person effects") and whether short-term increases in alcohol consumption might result in short-term increases in ASB ("within-person effects").

METHOD

Frequency of ASB and typical alcohol consumption were assessed repeatedly in young people 15 to 21 years old in a population-based birth cohort (Avon Longitudinal Study of Parents and Children). Longitudinal trajectories showed ASB decreasing and alcohol use increasing across adolescence, which stabilized in adulthood. The parallel growth model was re-parameterized to simultaneously estimate the person-specific (or "between-person") and time-specific (or "within-person") influences of alcohol on ASB.

RESULTS

Typical alcohol consumption by young people 15 years old was positively associated with ASB cross-sectionally and into young adulthood (i.e., there were between-person effects of initial levels of alcohol consumption on initial [b 1.64, standard error 0.21; p < .001] and final [b 0.53, standard error 0.14; p < .001] levels of ASB). Within-person effects also were identified in early adulthood (b 0.06, standard error 0.02; p = .001), showing that when a young person reported consuming more alcohol than normal across the past year, that person also reported engaging in higher than usual levels of ASB.

CONCLUSION

The results are consistent with between- and within-person effects of excessive alcohol use on ASB desistence. Future research should further investigate this relation by investigating pathways into excessive alcohol use and ASB in adolescence.

Marijuana use and physical dating violence among adolescents and emerging adults: A systematic review and meta-analysis

BACKGROUND

As restrictions on marijuana are loosened, there is concern of a coming increase in marijuana use among adolescents and emerging adults, which could be coupled with commensurate increases in behavioral problems associated with use, such as physical dating violence (PDV). To summarize what is known about the association between marijuana use and PDV victimization and perpetration among 11-21year olds, we conducted a systematic review and meta-analysis of the relevant literature published between 2003 and 2015.

METHODS

Candidate articles were identified with a systematic search, and we used inclusion and exclusion criteria to review titles, abstracts, and the full text of studies for consideration. There were 13 articles examining marijuana in association with PDV; five addressed victimization and 11 addressed perpetration.

RESULTS

Findings suggest that marijuana use is associated with a 54% increase in the odds PDV victimization, and a 45% increase in the odds of perpetration.

CONCLUSIONS

Findings suggest that dating violence is a correlate of marijuana use, and that association is strongest among adolescents (vs. emerging adults) and girls (vs. boys). Therefore, it should be routinely included as a core data item in marijuana surveillance systems, so as to allow for behavioral monitoring.

Substance Use Among Transgender Students in California Public Middle and High Schools

BACKGROUND

Transgender adolescents face tremendous social stress in families and schools, which often leads to behavioral health disparities. This study assessed whether rates of substance use were higher among transgender adolescents when compared to nontransgender adolescents.

METHODS

This study is a secondary data analysis of the 2013-2015 California Healthy Kids Survey (CHKS) that examines whether rates of substance use are higher among transgender youth when compared to nontransgender youth. Participants included 4778 transgender and 630,200 nontransgender students in middle and high schools in nearly all school districts in California. The study outcomes were lifetime, recent, and in-school use of cigarettes, tobacco, alcohol, marijuana, cocaine, and ecstasy as well as nonmedical use of prescription painkillers, diet pills, Ritalin or Adderall, and cold medicine.

RESULTS

Transgender students were about 2-1/2 times more likely as nontransgender students to use cocaine/methamphetamine in their lifetime (odds ratio [OR] = 2.53; 95% confidence interval [CI] = 2.18-2.95) and about 2.8 times as likely to report past 30-day inhalant use (OR = 2.80; 95% CI = 2.41-3.26). Transgender students were more than twice as likely to report past 30-day prescription pain medication use (OR = 2.19; 95% CI = 1.90-2.53) and more than 3 times as likely to use cigarettes in school (OR = 3.37; 95% CI = 2.84-3.99).

CONCLUSIONS

The study's findings indicate a need for community- and school-based interventions that reduce substance use among transgender youth.

Stability of alcohol use and teen dating violence for female youth: A latent transition analysis

INTRODUCTION AND AIMS

Alcohol use is one of the most widely accepted and studied risk factors for teen dating violence (TDV). Too little research has explored longitudinally if it is true that an adolescent's alcohol use and TDV involvement simultaneously occur. In the current study, we examined whether there were latent status based on past-year TDV and alcohol use and whether female adolescents changed their statuses of TDV and alcohol use over time.

METHODS

The sample consisted of 583 female youths in seven public high schools in Texas. Three waves of longitudinal data collected from 2011 to 2013 were utilised in this study. Participants completed self-report assessments of alcohol use (past-year alcohol use, number of drinks in the past month and episodic heavy drinking within the past month) and psychological and physical TDV victimisation and perpetration. Latent transition analysis was used to examine if the latent status based on TDV and alcohol use changed over time.

RESULTS

Five separate latent statuses were identified: (i) no violence, no alcohol; (ii) alcohol; (iii) psychological violence, no alcohol; (iv) psychological violence, alcohol; and (v) physical and psychological violence, alcohol. Latent transition analysis indicated that adolescents generally remained in the same subgroup across time.

DISCUSSION

This study provides evidence on the co-occurrence of alcohol use and teen dating violence, and whether teens' status based on dating violence and alcohol use are stable over time. Findings from the current study highlight the importance of targeting both TDV and substance use in intervention and prevention programs. [Choi HJ, Elmquist J, Shorey RC, Rothman EF, Stuart GL,Temple JR. Stability of alcohol use and teen dating violence for female youth: Alatent transition analysis. Drug Alcohol Rev 2017;36:80-87].

"Get drunk. Smoke weed. Have fun.": A Content Analysis of Tweets About Marijuana and Alcohol

PURPOSE

To explore the sentiment and themes of Twitter chatter that mentions both alcohol and marijuana.

DESIGN

Cross-sectional analysis of tweets mentioning both alcohol and marijuana during 1 month was performed.

SETTING

The study setting was Twitter.

PARTICIPANTS

Tweets sent from February 4 to March 5, 2014, were studied.

METHOD

A random sample (n = 5000) of tweets that mentioned alcohol and marijuana were qualitatively coded as normalizing both substances, preferring one substance over the other, or discouraging both substances. Other common themes were identified.

RESULTS

More than half (54%) of the tweets normalized marijuana and alcohol (without preferring one substance over the other), and 24% preferred marijuana over alcohol. Only 2% expressed a preference for alcohol over marijuana, 7% discouraged the use of both substances, and the sentiment was unknown for 13% of the tweets. Common themes among tweets that normalized both substances included using the substances with friends (17%) and mentioning substance use in the context of sex or romance (14%). Common themes among tweets that preferred marijuana over alcohol were the beliefs that marijuana is safer than alcohol (46%) and preferences for effects of marijuana over alcohol (40%).

CONCLUSION

Tweets normalizing polysubstance use or encouraging marijuana use over alcohol use are common. Both online and offline prevention efforts are needed to increase awareness of the risks associated with polysubstance use and marijuana use.

Prenatal, perinatal, and adolescent exposure to marijuana: Relationships with aggressive behavior

This manuscript reviews research exploring the relationship between prenatal, perinatal, and adolescent exposure to marijuana and aggressive behavior, including physical aggression. Areas of inquiry include animal research, as well as human research, on prenatal exposure and on marijuana use during adolescence. Potential psychosocial and psychopharmacological mechanisms are identified, as well as relevant confounds. The prenatal marijuana exposure literature provides minimal support for a direct relationship with aggressive behavior in childhood. The adolescent use literature suggests a marginal (at best) association between acute intoxication and aggressive behavior, and an association between chronic use and aggressive behavior heavily influenced by demographic variables, rather than direct, psychopharmacological mechanisms. Cannabis withdrawal symptoms also may include aggression and anger, but there is little evidence to suggest that these effects are large or specific to withdrawal from marijuana compared to other substances. This review will offer recommendations for clinical care and public policy, as well as important questions for future research.

Continuity of cannabis use and violent offending over the life course

BACKGROUND

Although the association between cannabis use and violence has been reported in the literature, the precise nature of this relationship, especially the directionality of the association, is unclear.

METHOD

Young males from the Cambridge Study of Delinquent Development (n = 411) were followed up between the ages of 8 and 56 years to prospectively investigate the association between cannabis use and violence. A multi-wave (eight assessments, T1-T8) follow-up design was employed that allowed temporal sequencing of the variables of interest and the analysis of violent outcome measures obtained from two sources: (i) criminal records (violent conviction); and (ii) self-reports. A combination of analytic approaches allowing inferences as to the directionality of associations was employed, including multivariate logistic regression analysis, fixed-effects analysis and cross-lagged modelling.

RESULTS

Multivariable logistic regression revealed that compared with never-users, continued exposure to cannabis (use at age 18, 32 and 48 years) was associated with a higher risk of subsequent violent behaviour, as indexed by convictions [odds ratio (OR) 7.1, 95% confidence interval (CI) 2.19-23.59] or self-reports (OR 8.9, 95% CI 2.37-46.21). This effect persisted after controlling for other putative risk factors for violence. In predicting violence, fixed-effects analysis and cross-lagged modelling further indicated that this effect could not be explained by other unobserved time-invariant factors. Furthermore, these analyses uncovered a bi-directional relationship between cannabis use and violence.

CONCLUSIONS

Together, these results provide strong indication that cannabis use predicts subsequent violent offending, suggesting a possible causal effect, and provide empirical evidence that may have implications for public policy.

Does Marijuana Use Contribute to Intimate Partner Aggression? A Brief Review and Directions for Future Research

Marijuana users are more likely to perpetrate intimate partner aggression (IPA) than non-users, yet the mechanism responsible for this association is unknown. Recent studies considering the association between episodes of marijuana use and episodes of IPA have failed to find evidence consistent with an acute effect of marijuana. Research gaps are highlighted and a heuristic model of marijuana's potential effects on IPA is presented. Research priorities include consideration of mediating mechanisms, moderating variables at the individual and couple level, and examination of acute effects of marijuana using daily report and EMA designs.

Substance Use and Physical Dating Violence: The Role of Contextual Moderators

INTRODUCTION

Theoretic models suggest that associations between substance use and dating violence perpetration may vary in different social contexts, but few studies have examined this proposition. The current study examined whether social control and violence in the neighborhood, peer, and family contexts moderate the associations between substance use (heavy alcohol use, marijuana, and hard drug use) and adolescent physical dating violence perpetration.

METHODS

Adolescents in the eighth, ninth, and tenth grades completed questionnaires in 2004 and again four more times until 2007 when they were in the tenth, 11th, and 12th grades. Multilevel analysis was used to examine interactions between each substance and measures of neighborhood, peer, and family social control and violence as within-person (time-varying) predictors of physical dating violence perpetration across eighth through 12th grade (N=2,455). Analyses were conducted in 2014.

RESULTS

Physical dating violence perpetration increased at time points when heavy alcohol and hard drug use were elevated; these associations were weaker when neighborhood social control was higher and stronger when family violence was higher. Also, the association between heavy alcohol use and physical dating violence perpetration was weaker when teens had more-prosocial peer networks and stronger when teens' peers reported more physical dating violence.

CONCLUSIONS

Linkages between substance use and physical dating violence perpetration depend on substance use type and levels of contextual violence and social control. Prevention programs that address substance use-related dating violence should consider the role of social contextual variables that may condition risk by influencing adolescents' aggression propensity.