Effects of a Community-Level Intervention on Alcohol-Related Motor Vehicle Crashes in California Cities: A Randomized Trial.

INTRODUCTION: This trial assesses the effects of a community-level alcohol prevention intervention in California on alcohol-related motor vehicle crashes. STUDY DESIGN: The study is a group RCT with cities as the unit of assignment to condition and as the unit of analysis. SETTING/PARTICIPANTS: A total of 24 California cities with populations between 50,000 and 450,000 were chosen at random and roughly matched into pairs before randomly assigning 12 each to the intervention and control conditions. INTERVENTION: The intervention, aimed at reducing excessive drinking among adolescents and young adults, included driving under the influence sobriety checkpoints, saturation patrols, and undercover operations to reduce service of alcohol to intoxicated patrons in bars, all including high visibility so the public would be aware of them. A measure of overall intervention intensity or dosage was created. MAIN OUTCOME MEASURES: The outcome was a monthly percentage of all motor vehicle crashes that were single vehicle nighttime crashes for drivers aged 15-30 years. RESULTS: Multilevel analyses were conducted to examine intervention effects on alcohol-related crashes among drivers aged 15-30 years. Crash data were obtained in 2018 with data preparation and analysis conducted in 2019. Intent-to-treat analyses indicated a 17% reduction in the percentage of alcohol-involved crashes among drivers aged 15-30 years relative to controls, which translates to about 310 fewer crashes. Dosage was found to have a statistically significant effect on crashes among this age group, although not in the expected direction. CONCLUSIONS: Enhanced alcohol enforcement operations involving both community health and law enforcement agencies can help to reduce alcohol-impaired driving and related consequences among young people. Including measures of intervention dosage raises interesting questions about the understanding of the impact of the community intervention. Future studies should continue to further develop implementation strategies that may more effectively and efficiently reduce community alcohol-related harm.

Results of a Randomized Trial of Web-Based Retail Onsite Responsible Beverage Service Training: WayToServe.

OBJECTIVE: Research in Responsible Beverage Service (RBS) training indicates that such training can prevent over-service of alcohol and reduce drunk driving. However, reviews of the RBS literature suggest that the quality of training methods and the stability of implementation are important factors in determining RBS training effectiveness. Most RBS classes have been taught live, where the quality of instruction varies across instructors and classes, and the stability of the implementation of an RBS curriculum is variable. Web-based RBS training may carry important advantages by stabilizing instruction and implementation factors. Randomized trial results of a web-based onsite RBS training program (WayToServe® [WTS]) are reported here. It was hypothesized that servers trained by WTS would refuse alcohol service at significantly higher rates compared with Usual and Customary (UC) live training. METHOD: On-site alcohol-serving establishments in New Mexico communities were randomized to receive WTS training (n = 154) or the Usual and Customary live RBS training (n = 155). Premises were assessed at baseline, immediate post-training, 6-months post-training, and 1-year post-training intervals. Pseudo-intoxicated patron protocols were used to assess premise alcohol service during the early to mid-evening hours of 6:30 P.M. to 8:30 P.M., with the percentage of alcohol service refusals to apparently intoxicated pseudo-patrons as the primary outcome variable. RESULTS: Results indicate significantly higher refusal rates for WTS than for UC premises at the immediate (WTS = 68% vs. UC = 49%) and the 1-year post-training assessment points (WTS = 68% vs. UC = 58%) but not at the 6-month post-training assessment (WTS = 69% vs. UC = 64%). Differences in refusal rates based on pseudo-patron age were observed where younger pseudo-patrons were consistently refused more often than older pseudo-patrons. CONCLUSIONS: Effective RBS training can be delivered online, making it a potentially cost-effective way of reaching large alcohol server populations.

A Mixed-Methods Approach Examining Illicit Prescription Stimulant Use: Findings From a Northern California University.

Preventing the illicit use of prescription stimulants, a particularly high-risk form of substance use, requires approaches that utilize theory-guided research. We examined this behavior within the context of a random sample of 554 undergraduate students attending a university in northern California. Approximately 17% of students self-reported engaging in this behavior during college; frequency of misuse per academic term ranged from less than once to 40 or more times. Although most misusers reported oral ingestion, a small proportion reported snorting and smoking the drug. The majority of misusers reported receiving the drug at no cost, and the primary source of the drug was friends. Misusers were motivated by both academic (e.g., to improve focus) and non-academic (e.g., to experiment) reasons. Our thematic analyses of an open-end question revealed that students abstaining from illicit use of prescription stimulants did so primarily for reasons related to health risks, ethics, and adherence regulations. Results from adjusted logistic regression analyses showed that correlates of the behavior were intrapersonal, interpersonal, and environmental in nature. We conclude that characteristics of misuse are a cause for concern, and correlates of the behavior are multifaceted. These findings, in addition to insights provided by students who choose not to engage in this behavior, suggest that a number of prevention approaches are plausible, such as a social norms campaign that simultaneously corrects exaggerated beliefs about prevalence while also illustrating why abstainers, in their own words, choose to abstain.

Party Characteristics, Drinking Settings, and College Students' Risk of Intoxication: A Multi-Campus Study.

We examined party characteristics across different college drinking settings, associations between party characteristics and likelihood of drinking to intoxication, and the mediating role of perceived prevalence of intoxicated partygoers. Students (N = 6903) attending 14 public universities in California during the 2010 and 2011 fall semesters completed surveys on individual and party characteristics in six unique settings (e.g., residence hall). We used descriptive statistics to examine party characteristics by setting. We estimated multilevel logistic regression models to identify party characteristics associated with drinking to intoxication, and we used RMediation to determine significance of mediating effects. Individual and party characteristics varied by drinking context. Greater time at a party was associated with drinking to intoxication at five of six settings, while larger party size was significant only for outdoor settings. Enforcing the legal drinking age and refusing to serve intoxicated patrons were associated with lower likelihood of intoxication at Greek and off-campus parties. The presence of a keg was associated with drinking to intoxication at Greek, off-campus and outdoor parties; at bars, cover charges and drink promotions were positively associated with drinking to intoxication. In four of six settings, we found evidence of significant mediating effects through perceived prevalence of intoxicated partygoers. Findings highlight risk and protective characteristics of parties by drinking setting, and have prevention implications.

Using structural equation modeling to understand prescription stimulant misuse: a test of the Theory of Triadic Influence.

OBJECTIVE: To test a theory-driven model of health behavior to predict the illicit use of prescription stimulants (IUPS) among college students. PARTICIPANTS: A probability sample of 554 students from one university located in California (response rate=90.52%). METHODS: Students completed a paper-based survey developed with guidance from the Theory of Triadic Influence. We first assessed normality of measures and checked for multicollinearity. A single structural equation model of frequency of IUPS in college was then tested using constructs from the theory's three streams of influence (i.e., intrapersonal, social situation/context, and sociocultural environment) and four levels of causation (i.e., ultimate causes, distal influences, proximal predictors, and immediate precursors). RESULTS: Approximately 18% of students reported engaging in IUPS during college, with frequency of use ranging from never to 40 or more times per academic term. The model tested had strong fit and the majority of paths specified within and across streams were significant at the p<0.01 level. Additionally, 46% of the variance in IUPS frequency was explained by the tested model. CONCLUSIONS: Results suggest the utility of the TTI as an integrative model of health behavior, specifically in predicting IUPS, and provide insight on the need for multifaceted prevention and intervention efforts.

Apparent Motives for Aggression in the Social Context of the Bar.

OBJECTIVE: Little systematic research has focused on motivations for aggression and most of the existing research is qualitative and atheoretical. This study increases existing knowledge by using the theory of coercive actions to quantify the apparent motives of individuals involved in barroom aggression. Objectives were to examine: gender differences in the use of compliance, grievance, social identity, and excitement motives; how motives change during an aggressive encounter; and the relationship of motives to aggression severity. METHOD: We analyzed 844 narrative descriptions of aggressive incidents observed in large late-night drinking venues as part of the Safer Bars evaluation. Trained coders rated each type of motive for the 1,507 bar patrons who engaged in aggressive acts. RESULTS: Women were more likely to be motivated by compliance and grievance, many in relation to unwanted sexual overtures from men; whereas men were more likely to be motivated by social identity concerns and excitement. Aggressive acts that escalated tended to be motivated by identity or grievance, with identity motivation especially associated with more severe aggression. CONCLUSIONS: A key factor in preventing serious aggression is to develop approaches that focus on addressing identity concerns in the escalation of aggression and defusing incidents involving grievance and identity motives before they escalate. In bars, this might include training staff to recognize and defuse identity motives and eliminating grievance-provoking situations such as crowd bottlenecks and poorly managed queues. Preventive interventions generally need to more directly address the role of identity motives, especially among men.

Young adults and casual sex: the relevance of college drinking settings.

This study investigated the relevance of college drinking settings on the likelihood of students having sexual intercourse with a stranger. A random sample of 7,414 undergraduates at 14 public California universities responded to questions regarding frequency of attendance at six different setting types since the beginning of the semester (e.g., Greek, residence-hall parties, and bars or restaurants), drinking behavior, and sexual activity. Multi-level modeling examined the association between each setting type and the occurrence of alcohol-related sexual intercourse with a stranger. Findings indicated strong, positive associations between frequency of attendance at Greek parties, residence-hall parties, off-campus parties, and the occurrence of alcohol-related sex with a stranger. Frequency of attending the six settings and proportion of times drunk at the settings were also positively associated with alcohol-related sex with a stranger. Efforts aimed at preventing outcomes associated with casual sex (e.g., pregnancy, sexually transmitted infections, or mental health) should target specific drinking settings where students might be at high risk for risky alcohol use and unsafe sex behaviors.

Behavioural indicators of motives for barroom aggression: implications for preventing bar violence.

INTRODUCTION AND AIMS: To develop new strategies for preventing violence in high-risk licensed premises, we identify behavioural indicators of apparent motives for aggression in these settings and outline the implications of different motivations for prevention. DESIGN AND METHODS: The four types of motives for aggressive or coercive acts defined by the theory of coercive actions framed the research: gaining compliance, expressing grievances/restoring justice, attaining a favourable social identity and pursuing fun/excitement. Incidents of aggression from the Safer Bars evaluation research were analysed to identify behavioural indicators of each motivation. RESULTS: Compliance-motivated aggression typically takes the form of unwanted social overtures, third party intervention to stop conflicts or staff rule enforcement. Prevention strategies include keeping the aggressor's focus on compliance to avoid provoking grievance and identity motives that are likely to escalate aggression. Grievance motives are typically elicited by perceived wrongdoing and therefore prevention should focus on eliminating sources of grievances and adopting policies/practices to resolve grievances peacefully. Social identity motives are endemic to many drinking establishments especially among male patrons and staff. Prevention involves reducing identity cues in the environment, hiring staff who do not have identity concerns, and training staff to avoid provoking identity concerns. Aggression motivated by fun/excitement often involves low-level aggression where escalation can be prevented by avoiding grievances and attacks on identity. DISCUSSION AND CONCLUSIONS: Knowledge of behavioural indicators of motives can be used to enhance staff hiring and training practices, reduce environmental triggers for aggression, and develop policies to reduce motivation for aggression.

Evaluation of an Internet-based alcohol misuse prevention course for college freshmen: findings of a randomized multi-campus trial.

BACKGROUND: Internet-based alcohol misuse prevention programs are now used by many universities. One popular 2- to 3-hour online course known as AlcoholEdu for College is typically required for all incoming freshmen and thus constitutes a campus-level strategy to reduce student alcohol misuse. PURPOSE: Multi-campus study to evaluate the effectiveness of an Internet-based alcohol misuse prevention course. DESIGN: RCT with 30 universities: 21 entered the study in Fall 2007, nine in Fall 2008. Fifteen were randomly assigned to receive the online course and the other 15 were assigned to the control condition. The course was implemented by intervention schools during the late summer and/or fall semester. Cross-sectional surveys of freshmen were conducted at each university, beginning prior to the intervention in Spring 2008-2009; post-intervention surveys were administered in Fall 2008-2009 and Spring 2009-2010. SETTING/PARTICIPANTS: Public and private universities of varying sizes across the U.S. Random samples of 200 freshmen per campus were invited to participate in online surveys for the evaluation. Overall survey response rates ranged from 44% to 48% (M ≈ 90 participants per campus). INTERVENTION: The online course includes five modules; the first four (Part I) are typically offered in the late summer before matriculation, and the fifth (Part II) in early fall. Course content includes defining a standard drink, physiologic effects of alcohol, the need to monitor blood alcohol level, social influences on alcohol use, alcohol laws, personalized normative feedback, and alcohol harm-reduction strategies. Students must pass an exam after Part I to advance to Part II. MAIN OUTCOME MEASURES: Past-30-day alcohol use, average number of drinks per occasion, and binge drinking. RESULTS: Multilevel intent-to-treat analyses indicated significant reductions in the frequency of past-30-day alcohol use (beta = -0.64, p<0.05) and binge drinking (beta = -0.26, p<0.05) during the fall semester immediately after completion of the course. However, these effects did not persist when assessed in the spring semester. Post hoc comparisons suggested stronger course effects on these outcomes at colleges with higher rates of student course completion. No course effects were observed for average number of drinks per occasion or prevalence of binge drinking, regardless of the campus course completion rate. CONCLUSIONS: This study provides initial evidence that the Internet-based alcohol misuse prevention course has beneficial short-term effects on hazardous drinking behavior among first-year college students, which should be reinforced through effective environmental prevention strategies.

Effects of AlcoholEdu for college on alcohol-related problems among freshmen: a randomized multicampus trial.

OBJECTIVE: AlcoholEdu for College is a 2- to 3-hour online course for incoming college freshmen. This study was the first multicampus trial to examine effects of AlcoholEdu for College on alcohol-related problems among freshmen. METHOD: Thirty universities participated in the study. Fifteen were randomly assigned to receive AlcoholEdu, and the other 15 were assigned to the control condition. AlcoholEdu was implemented by intervention schools during the summer and/or fall semester. Cross-sectional surveys of freshmen were conducted at each university beginning before the intervention in spring 2008/2009; post-intervention surveys were administered in fall 2008/2009 and spring 2009/2010. The surveys included questions about the past-30-day frequency of 28 alcohol-related problems, from which we created indices for the total number of problems and problems in seven domains: physiological, academic, social, driving under the influence/ riding with drinking drivers, aggression, sexual risk taking, and victimization. Multilevel Poisson regression analyses were conducted to examine intent-to-treat and dosage effects of AlcoholEdu for College on these outcomes. RESULTS: Multilevel intent-to-treat analyses indicated significant reductions in the risk for past-30-day alcohol problems in general and problems in the physiological, social, and victimization domains during the fall semester immediately after completion of the course. However, these effects did not persist in the spring semester. Additional analyses suggested stronger AlcoholEdu effects on these outcomes at colleges with higher rates of student course completion. No AlcoholEdu effects were observed for alcohol-related problems in the other four domains. CONCLUSIONS: AlcoholEdu for College appears to have beneficial short-term effects on victimization and the most common types of alcohol-related problems among freshmen. Universities may benefit the most by mandating AlcoholEdu for College for all incoming freshmen and by implementing this online course along with environmental prevention strategies.

Environmental approaches to prevention in college settings.

Because of concerns regarding drinking among college students and its harmful consequences, numerous prevention efforts have been targeted to this population. These include individual-level and community-level interventions, as well as other measures (e.g., online approaches). Community-level interventions whose effects have been evaluated in college populations include programs that were developed for the community at large as well as programs aimed specifically at college students, such as A Matter of Degree, the Southwest DUI Enforcement Project, Neighborhoods Engaging With Students, the Study to Prevent Alcohol-Related Consequences, and Safer California Universities. Evaluations of these programs have found evidence of their effectiveness in reducing college drinking and related consequences. The most effective approaches to reducing alcohol consumption among college students likely will blend individual-, group-, campus-, and community-level prevention components.

Types of drinkers and drinking settings: an application of a mathematical model.

AIMS: US college drinking data and a simple population model of alcohol consumption are used to explore the impact of social and contextual parameters on the distribution of light, moderate and heavy drinkers. Light drinkers become moderate drinkers under social influence, moderate drinkers may change environments and become heavy drinkers. We estimate the drinking reproduction number, R(d) , the average number of individual transitions from light to moderate drinking that result from the introduction of a moderate drinker in a population of light drinkers. DESIGN AND SETTINGS: Ways of assessing and ranking progression of drinking risks and data-driven definitions of high- and low-risk drinking environments are introduced. Uncertainty and sensitivity analyses, via a novel statistical approach, are conducted to assess R(d) variability and to analyze the role of context on drinking dynamics. FINDINGS: Our estimates show R(d) well above the critical value of 1. R(d) estimates correlate positively with the proportion of time spent by moderate drinkers in high-risk drinking environments. R(d) is most sensitive to variations in local social mixing contact rates within low-risk environments. The parameterized model with college data suggests that high residence times of moderate drinkers in low-risk environments maintain heavy drinking. CONCLUSIONS: With regard to alcohol consumption in US college students, drinking places, the connectivity (traffic) between drinking venues and the strength of socialization in local environments are important determinants in transitions between light, moderate and heavy drinking as well as in long-term prediction of the drinking dynamics.

Alcohol risk management in college settings: the safer California universities randomized trial.

CONTEXT: Potentially effective environmental strategies have been recommended to reduce heavy alcohol use among college students. However, studies to date on environmental prevention strategies are few in number and have been limited by their nonexperimental designs, inadequate sample sizes, and lack of attention to settings where the majority of heavy drinking events occur. PURPOSE: To determine whether environmental prevention strategies targeting off-campus settings would reduce the likelihood and incidence of student intoxication at those settings. DESIGN: The Safer California Universities study involved 14 large public universities, half of which were assigned randomly to the Safer intervention condition after baseline data collection in 2003. Environmental interventions took place in 2005 and 2006 after 1 year of planning with seven Safer intervention universities. Random cross-sectional samples of undergraduates completed online surveys in four consecutive fall semesters (2003-2006). SETTING/PARTICIPANTS: Campuses and communities surrounding eight campuses of the University of California and six in the California State University system were utilized. The study used random samples of undergraduates (∼500-1000 per campus per year) attending the 14 public California universities. INTERVENTION: Safer environmental interventions included nuisance party enforcement operations, minor decoy operations, driving-under-the-influence checkpoints, social host ordinances, and use of campus and local media to increase the visibility of environmental strategies. MAIN OUTCOME MEASURES: Proportion of drinking occasions in which students drank to intoxication at six different settings during the fall semester (residence hall party, campus event, fraternity or sorority party, party at off-campus apartment or house, bar/restaurant, outdoor setting), any intoxication at each setting during the semester, and whether students drank to intoxication the last time they went to each setting. RESULTS: Significant reductions in the incidence and likelihood of intoxication at off-campus parties and bars/restaurants were observed for Safer intervention universities compared to controls. A lower likelihood of intoxication was observed also for Safer intervention universities the last time students drank at an off-campus party (OR=0.81, 95% CI=0.68, 0.97); a bar or restaurant (OR=0.76, 95% CI=0.62, 0.94); or any setting (OR=0.80, 95% CI=0.65, 0.97). No increase in intoxication (e.g., displacement) appeared in other settings. Further, stronger intervention effects were achieved at Safer universities with the highest level of implementation. CONCLUSIONS: Environmental prevention strategies targeting settings where the majority of heavy drinking events occur appear to be effective in reducing the incidence and likelihood of intoxication among college students.

Communication between researchers and practitioners: findings from a qualitative evaluation of a large-scale college intervention.

Many community-based intervention studies experience problems with collaboration between researchers and practitioners. A preferred strategy appears to be to form community coalitions to carry out the proposed interventions in the community, but doing so risks shifting the focus from intervention objectives to coalition process. As a by-product, coalitions often lack understanding of the project goals and are not given specific instructions on how to implement the intervention. In contrast to conventional wisdom, the Safer California Universities study implemented a very directive approach in collaboration with local liaisons on the participating campuses, even though this approach is seen to risk cooperation or commitment from collaborators. This paper reports on the findings of a qualitative study based on interviews with campus liaisons of how the directive approach was perceived on the participating campuses. Findings indicate that the strategy was successful in terms of "getting things done" but could have been improved in terms of liaison involvement in setting objectives, and in finding the optimal level of specificity.

Evaluating a comprehensive campus-community prevention intervention to reduce alcohol-related problems in a college population.

OBJECTIVE: This article evaluates Western Washington University's Neighborhoods Engaging with Students project-a comprehensive strategy to decrease disruptive off-campus parties by increasing student integration into and accountability to the neighborhoods in which they live. The intervention includes increasing the number of and publicity regarding "party emphasis patrols" and collaboration with the city to develop a regulatory mechanism to reduce repeat problematic party calls to the same address. The enforcement components are complemented by campus-based, late-night expansion programming, as well as neighborhood engagement strategies including an educational Web site designed to increase students' knowledge of and skills in living safely and legally in the community, service-learning projects in the campus-contiguous neighborhoods, and a neighborhood-based conflict-resolution program. METHOD: The evaluation comprised data from three public universities in Washington. In addition to the Western Washington University site, a second campus created an opportunity for a "natural experiment" because it adopted a very similar intervention in the same time frame, creating two intervention sites and one comparison site. Annual, Web-based student surveys in 2005 and 2006 included measures of alcohol consumption, alcohol-related problems, and student perception of alcohol control and prevention activities. RESULTS: Although statistical power with three campuses was limited, results using hierarchical linear modeling showed that the prevalence of heavy episodic drinking was significantly lower at the intervention schools (odds ratio = 0.73; N = 6,150 students). CONCLUSIONS: The results suggest that alcohol control measures can be effective in reducing problematic drinking in college settings. These findings strongly support conducting a replication with greater power and a more rigorous design.

Relationships between college settings and student alcohol use before, during and after events: a multi-level study.

INTRODUCTION AND AIMS: We examined how alcohol risk is distributed based on college students' drinking before, during and after they go to certain settings. DESIGN AND METHODS: Students attending 14 California public universities (N=10,152) completed a web-based or mailed survey in the fall 2003 semester, which included questions about how many drinks they consumed before, during and after the last time they went to six settings/events: fraternity or sorority party, residence hall party, campus event (e.g. football game), off-campus party, bar/restaurant and outdoor setting (referent). Multi-level analyses were conducted in hierarchical linear modeling (HLM) to examine relationships between type of setting and level of alcohol use before, during and after going to the setting, and possible age and gender differences in these relationships. Drinking episodes (N=24,207) were level 1 units, students were level 2 units and colleges were level 3 units. RESULTS: The highest drinking levels were observed during all settings/events except campus events, with the highest number of drinks being consumed at off-campus parties, followed by residence hall and fraternity/sorority parties. The number of drinks consumed before a fraternity/sorority party was higher than other settings/events. Age group and gender differences in relationships between type of setting/event and 'before,''during' and 'after' drinking levels also were observed. For example, going to a bar/restaurant (relative to an outdoor setting) was positively associated with 'during' drinks among students of legal drinking age while no relationship was observed for underage students. DISCUSSION AND CONCLUSIONS: Findings of this study indicate differences in the extent to which college settings are associated with student drinking levels before, during and after related events, and may have implications for intervention strategies targeting different types of settings.

Friday class and heavy alcohol use in a sample of New Zealand college students.

OBJECTIVE: This study examined the association between scheduling at least one Friday class and the pattern and levels of alcohol use and heavy drinking in a sample of New Zealand college students. METHOD: Two waves of survey data were collected from 866 college students in New Zealand in the first and second semesters of the 2000 academic year. Descriptive and regression analyses were conducted to examine the associations between scheduling Friday class in the second semester, levels of alcohol use and heavy drinking in the past month, and alcohol use on different weeknights. We hypothesized that (1) heavier-drinking students would be less likely to schedule any Friday classes, (2) having at least one Friday class would be inversely related to concurrent alcohol use and heavy drinking when adjusting for potential confounders, and (3) having Friday class would be inversely related to alcohol use and heavy drinking on Thursdays and prior week- nights. RESULTS: Analysis results supported the hypothesis that heavier- drinking students would be less likely to schedule Friday classes but did not support the hypothesis that scheduling at least one Friday class would be inversely related to concurrent alcohol use and heavy drinking when adjusting for potential confounders. Having Friday class also was not associated with typical drinking on Thursday or Friday, but having Friday class was inversely associated with Thursday as the biggest drinking day when controlling for background variables. CONCLUSIONS: Findings of this study indicate that heavier-drinking students are less likely to schedule Friday classes. Scheduling at least one Friday class may reduce the likelihood of heavy drinking on Thursdays but may have no effect on the overall levels of alcohol use and heavy drinking among college students.