Single vs. multiple drug prevention: is more always better?: a pilot study. School-based alcohol education: results of a cluster-randomized controlled trial. A computerized harm minimization prevention program for alcohol misuse and related harms: randomized controlled trial. Reducing the risks of alcohol use among urban youth: three-year effects of a computer-based intervention with and without parent involvement. Combining in-school and community-based media efforts: reducing marijuana and alcohol uptake among younger adolescents. Brief intervention for heavy-drinking college students: 4-year follow-up and natural history. Project Northland: outcomes of a communitywide alcohol use prevention program during early adolescence. Preventing heavy alcohol use in adolescents (PAS): cluster randomized trial of a parent and student intervention offered separately and simultaneously. Brief group alcohol interventions with college students: examining motivational components.
The purpose of this study was to compare the effects of a single drug, i.e., alcohol, against a multiple drug preventive intervention.
                A controlled trial was conducted with 448 8th grade students (mean age = 13 years old) from an inner-city middle school (n = 216) and a rural junior high school (n = 232) in 2000-2001. Students were randomized within school, and 3-month post-intervention follow-up data were collected.
                Two risk/protective factors were found to differ significantly in favor of youth receiving the single drug alcohol intervention (p's = 0.03), while the frequency of alcohol use and two additional risk/protective factors approached significance (p's < 0.10).
                These findings support the potential efficacy of a brief, single drug preventive intervention over a brief, multi-drug intervention in producing short-term alcohol outcomes for adolescents, and indicate differential effects of interventions for subgroups of substance using youth. This study aimed to examine the effects of a school-based alcohol education intervention.
                Two-arm three-wave cluster-randomized controlled trial, with schools as the unit for randomization. Surveys were conducted prior to intervention implementation, then 4 and 12 months after baseline.
                A total of 30 public schools in Schleswig-Holstein, Germany. Participants Baseline data were obtained from 1686 7th graders. The retention rate was 85% over 12 months. Intervention The intervention consisted of four interactive lessons conducted by teachers, booklets for students and booklets for parents.
                Knowledge, attitudes, life-time alcohol consumption (ever use alcohol without parental knowledge, ever been drunk and ever binge drinking) and past-month alcohol use.
                Intention-to-treat analyses revealed that intervention status was associated with more general knowledge about alcohol and lower levels of life-time binge drinking. No effects were found with respect to students' self-reported attitudes, intentions to drink, life-time alcohol use and past-month alcohol use.
                The results indicate that this brief school-based intervention had a small short-term preventive effect on alcohol misuse. Hazardous alcohol use is a leading cause of death among adolescents and young adults world-wide, yet few effective prevention interventions exist. This study was the first to examine a computerized harm minimization intervention to reduce alcohol misuse and related harms in adolescents.
                Cluster randomized controlled trial of a six-session curriculum-integrated harm minimization prevention program. The intervention was delivered by computer in the form of a teenage drama, which provided education through alcohol-related scenarios to which young people could relate.
                Schools in Australia.
                A total of 1466 year 8 students (13 years) from 16 high schools in Australia were allocated randomly to a computerized prevention program (n = 611, eight schools) or usual classes (n = 855, eight schools).
                Change in knowledge, alcohol use, alcohol-related harms and alcohol expectancies.
                A computerized prevention program was more effective than usual classes in increasing alcohol-related knowledge of facts that would inform safer drinking choices and decreasing the positive social expectations which students believed alcohol may afford. For females it was effective in decreasing average alcohol consumption, alcohol-related harms and the frequency of drinking to excess (more than four standard drinks; 10 g ethanol). For males the behavioural effects were not significant.
                A harm minimization approach is effective in educating young people about alcohol-related risks and is effective in reducing risky drinking and harms among girls. Reduction of problems among boys remains a challenge. This study tested a CD-ROM intervention with and without a parent involvement component to reduce risk of alcohol use among an urban sample of early adolescents.
                Youths (N = 514, mean age 11.5 years at recruitment) were assigned randomly by community site to receive the CD-ROM intervention, the CD-ROM plus parent intervention, or no intervention. All youths completed pretest, posttest and three annual follow-up measurements. After pretesting, youths and parents received their respective interventions.
                Main effects of the intervention and for measurement occasion as well as interaction effects of the intervention by measurement occasion were seen for substance use and related outcomes. Over time, youths in all 3 groups reported increased use of alcohol, tobacco and marijuana; youths who received the interventions reported smaller increases than control youths. At 3-year follow-up, alcohol use was lower for CD-ROM plus parent intervention youths than for CD-ROM only youths, who, in turn, reported less use than controls. Cigarette use was lower for youths in either intervention group than in the control group at posttest and at 1-, 2- and 3-year follow-ups. Marijuana use was lower for youths in either intervention than for controls at 1-, 2- and 3-year follow-ups. Youths in both intervention groups outperformed control youths at posttest and at 1- and 3-year follow-ups on levels of negative and peer influence toward substance use. Finally, at the 3-year follow-up, youths in the CD-ROM plus parent intervention group reported more family involvement in their alcohol use prevention efforts than did youths in the CD-ROM group, who, in turn, reported more positive levels of family involvement than youths in the control group.
                Study findings modestly support the CD-ROM intervention with and without the parent intervention to reduce alcohol use risks among urban early adolescents. This study tests the impact of an in-school mediated communication campaign based on social marketing principles, in combination with a participatory, community-based media effort, on marijuana, alcohol and tobacco uptake among middle-school students. Eight media treatment and eight control communities throughout the US were randomly assigned to condition. Within both media treatment and media control communities, one school received a research-based prevention curriculum and one school did not, resulting in a crossed, split-plot design. Four waves of longitudinal data were collected over 2 years in each school and were analyzed using generalized linear mixed models to account for clustering effects. Youth in intervention communities (N = 4,216) showed fewer users at final post-test for marijuana [odds ratio (OR) = 0.50, P = 0.019], alcohol (OR = 0.40, P = 0.009) and cigarettes (OR = 0.49, P = 0.039), one-tailed. Growth trajectory results were significant for marijuana (P = 0.040), marginal for alcohol (P = 0.051) and non-significant for cigarettes (P = 0.114). Results suggest that an appropriately designed in-school and community-based media effort can reduce youth substance uptake. Effectiveness does not depend on the presence of an in-school prevention curriculum. This study examined long-term response to an individual preventive intervention for high-risk college drinkers relative to the natural history of college drinking.
                A single-session, individualized preventive intervention was evaluated within a randomized controlled trial with college freshmen who reported drinking heavily while in high school. An additional group randomly selected from the entire screening pool provided a normative comparison. Participant self-report was assessed annually for 4 years.
                High-risk controls showed secular trends for reduced drinking quantity and negative consequences without changes in drinking frequency. Those receiving the brief preventive intervention reported significant additional reductions, particularly with respect to negative consequences. Categorical individual change analyses show that remission is normative, and they suggest that participants receiving the brief intervention are more likely to improve and less likely to worsen regarding negative drinking consequences.
                Brief individual preventive interventions for high-risk college drinkers can achieve long-term benefits even in the context of maturational trends. Project Northland is an efficacy trial with the goal of preventing or reducing alcohol use among young adolescents by using a multilevel, communitywide approach.
                Conducted in 24 school districts and adjacent communities in northeastern Minnesota since 1991, the intervention targets the class of 1998 (sixth-grade students in 1991) and has been implemented for 3 school years (1991 to 1994). The intervention consists of social-behavioral curricula in schools, peer leadership, parental involvement/education, and communitywide task force activities. Annual surveys of the class of 1998 measure alcohol use, tobacco use, and psychosocial factors.
                At the end of 3 years, students in the intervention school districts report less onset and prevalence of alcohol use than students in the reference districts. The differences were particularly notable among those who were nonusers at baseline.
                The results of Project Northland suggest that multilevel, targeted prevention programs for young adolescents are effective in reducing alcohol use. To evaluate the effectiveness of two preventive interventions to reduce heavy drinking in first- and second-year high school students. Design and
                Cluster randomized controlled trial using four conditions for comparing two active interventions with a control group from 152 classes of 19 high schools in the Netherlands.
                A total of 3490 first-year high school students (mean 12.68 years, SD=0.51) and their parents. Intervention conditions (i) Parent intervention (modelled on the Swedish Örebro Prevention Program) aimed at encouraging parental rule-setting concerning their children's alcohol consumption; (ii) student intervention consisting of four digital lessons based on the principles of the theory of planned behaviour and social cognitive theory; (iii) interventions 1 and 2 combined; and (iv) the regular curriculum as control condition. Main outcome measures Incidence of (heavy) weekly alcohol use and frequency of monthly drinking at 10 and 22 months after baseline measurement.
                  A total of 2937 students were eligible for analyses in this study. At first follow-up, only the combined student-parent intervention showed substantial and statistically significant effects on heavy weekly drinking, weekly drinking and frequency of drinking. At second follow-up these results were replicated, except for the effects of the combined intervention on heavy weekly drinking. These findings were consistent across intention-to-treat and completers-only analyses.
                Results suggest that adolescents as well as their parents should be targeted in order to delay the onset of drinking, preferably prior to onset of weekly drinking.
                © 2009 The Authors. Journal compilation © 2009 Society for the Study of Addiction. The utility of brief interventions with at-risk college drinkers would be enhanced if they could also be delivered in group settings without the need for risk prescreening. The current study therefore explored whether components of brief interventions could be effectively administered to mixed groups of drinking and non-drinking students. Specifically, the outcomes of two methods aimed toward increasing motivation for change were compared to controls. One intervention focused on enhancing actual-ideal drinking behavior discrepancy through a structured group discussion, while the other focused on enhancing self-norm drinking behavior discrepancy through the provision and discussion of didactic information. Among at-risk drinkers, significant reductions in heavy drinking episode frequency at four-week follow-up were found for the self-norm (S-N) group only, while reductions in alcohol problems were obtained in both the S-N and control groups. Results suggest that self-norm discrepancy enhancement strategies may be more effective than actual-ideal discrepancy strategies when used with a mixed drinking group.
There is some evidence that multi-component interventions for alcohol misuse prevention in young people can be effective. However, there is little evidence that interventions with multiple components are more effective than interventions with single components.