Brief school-based interventions and behavioural outcomes for substance-using adolescents

Propelling the Global Advancement of School Mental Health

Rates of mental health problems and disorders in children and youth have been increasing for at least three decades, and these have escalated due to the pandemic and multiple other societal stressors. It is increasingly recognized that students and families frequently struggle to receive needed care through traditional locations such as specialty mental health centers. Upstream mental health promotion and prevention strategies are gaining support as a public health approach to supporting overall population well-being, better utilizing a limited specialty workforce, and reducing illness. Based on these recognitions, there has been a progressive and escalating movement toward the delivery of mental health support to children and youth "where they are," with a prominent and more ecologically valid environment being schools. This paper will provide a brief review of the escalating mental health needs of children and youth, advantages of school mental health (SMH) programs in better meeting these needs, example model SMH programs from the United States and Canada, and national and international SMH centers/networks. We conclude with strategies for further propelling the global advancement of the SMH field through interconnected practice, policy, and research.

A supportive school environment may reduce the risk of non-medical prescription opioid use due to impaired mental health among students

Canada is in the midst of an ongoing, escalating opioid crisis, with significant impacts on adolescents and young adults. Accordingly, mental health impairment was examined as a risk factor for non-medical prescription opioid use (NMPOU) among high school students. In addition, the moderating effects of the school environment, in terms of the availability of mental health services and substance use policies, were characterized. Self-reported, cross-sectional data were obtained from the COMPASS study, including 61,239 students (grades 9-12) in 121 secondary schools across Canada. Current and lifetime NMPOU were ascertained. Categorical indicators of mental health impairment and school environment were derived. The main analytical strategy encompassed hierarchal multilevel logistic regression, including the addition of interaction terms to characterize the moderation effects. Current and lifetime NMPOU were reported by 5.8% and 7.2% of the students, respectively. After adjusting for confounders, students in the highest quintile of mental health impairment had odds ratios (OR) of 2.60 (95% confidence interval [CI] 2.29-2.95) and 2.96 (95% CI 2.64-3.33) for current and lifetime NMPOU, respectively when compared to students in the lowest quintile of mental health impairment. A significant interaction between mental health impairment and school environment indicated relatively lower risks of NMPOU in students from schools that provide more mental health services and have stricter substance use policies. Mental health impairment increased the risk of NMPOU, but the associations were moderated by the school environment. These findings underscore the importance of mental health services and substance use regulations in schools.

Adolescent Substance Use Disorder Treatment: an Update on Evidence-Based Strategies

PURPOSE OF REVIEW

To examine the most recent published evidence (2016-2019) regarding the treatment of adolescent substance use disorders and to provide an update on evidence-based strategies, adjunctive interventions, and methods to improve currently established treatment approaches.

RECENT FINDINGS

Recent evidence suggests that psychosocial treatments such as family-based therapy, cognitive behavioral therapy, and multicomponent approaches remain the most effective methods of treatment; however, innovative ways of improving these treatment strategies may include digital and culturally based interventions. New advances in adjunctive treatments such as pharmacotherapy, exercise, mindfulness, and recovery-oriented educational centers may have some clinical utility. Well-established psychosocial interventions remain the primary modality of treatment. Promising new adjunctive treatments and improvements in our currently established treatments may yield significant improvements.

Characteristics of stakeholder involvement in systematic and rapid reviews: a methodological review in the area of health services research

OBJECTIVE

Engaging stakeholders in reviews is considered to generate more relevant evidence and to facilitate dissemination and use. As little is known about stakeholder involvement, we assessed the characteristics of their engagement in systematic and rapid reviews and the methodological quality of included studies. Stakeholders were people with a particular interest in the research topic.

DESIGN

Methodological review.

SEARCH STRATEGY

Four databases (Medline, Embase, Cochrane database of systematic reviews, databases of the University of York, Center for Reviews and Dissemination (CRD)) were searched based on an a priori protocol. Four types of reviews (Cochrane and non-Cochrane systematic reviews, rapid and CRD rapid reviews) were retrieved between January 2011 and October 2015, pooled by potential review type and duplicates excluded. Articles were randomly ordered and screened for inclusion and exclusion criteria until 30 reviews per group were reached. Their methodological quality was assessed using AMSTAR and stakeholder characteristics were collected.

RESULTS

In total, 57 822 deduplicated citations were detected with potential non-Cochrane systematic reviews being the biggest group (56 986 records). We found stakeholder involvement in 13% (4/30) of Cochrane, 20% (6/30) of non-Cochrane, 43% (13/30) of rapid and 93% (28/30) of CRD reviews. Overall, 33% (17/51) of the responding contact authors mentioned positive effects of stakeholder involvement. A conflict of interest statement remained unmentioned in 40% (12/30) of non-Cochrane and in 27% (8/30) of rapid reviews, but not in Cochrane or CRD reviews. At most, half of non-Cochrane and rapid reviews mentioned an a priori study protocol in contrast to all Cochrane reviews.

CONCLUSION

Stakeholder engagement was not general practice, except for CRD reviews, although it was more common in rapid reviews. Reporting factors, such as including an a priori study protocol and a conflict of interest statement should be considered in conjunction with involving stakeholders.

Adolescent perspectives about their participation in alcohol intervention research in emergency care: A qualitative exploration using ethical principles as an analytical framework

AIMS

To explore adolescents' experiences of consenting to, and participating in, alcohol intervention trials when attending for emergency care.

METHODS

In-depth semi-structured interviews with 27 adolescents (16 males; aged 14-17 years (Mage = 15.7)) who had taken part in one of two linked brief alcohol intervention trials based in 10 accident and emergency departments in England. Interviews were transcribed verbatim and subject to thematic analysis.

RESULTS

Research and intervention methods were generally found to be acceptable though confidentiality was important and parental presence could hinder truthful disclosures regarding alcohol use. Participants discussed the importance of being involved in research that was relevant to them and recognised alcohol consumption as a normative part of adolescence, highlighting the importance of having access to appropriate health information. Beyond this, they recognised the benefits and risks of trial participation for themselves and others with the majority showing a degree of altruism in considering longer term implications for others as well as themselves.

CONCLUSIONS

Alcohol screening and intervention in emergency care is both acceptable and relevant to adolescents but acceptability is reliant on confidentiality being assured and may be inhibited by parental presence.

TRIAL REGISTRATION

ISRCTN Number: 45300218.

Prevalence of health-risk behaviors among teen girls in Southeastern Iran

Background

Investigating female adolescents’ health status is essential because of their two-fold role within the health of the community and the impending generations’ health.

Objective

The present study aimed to determine the prevalence of health-risk behaviors among teen girls in Southeastern Iran.

Methods

This cross-sectional study was carried out on a sample of 457 tenth grade female adolescents in four public high schools in Zahedan in Southeastern Iran, in 2015. First, high schools were randomly selected; then, all students in Grade 10 were enrolled in the study through a census. Data were collected using a self-reported questionnaire of the health-risk behaviors with the content validity ratio (CVR) of 0.80, the content validity index (CVI) of 0.88 and Cronbach’s α score of 0.71. The Results were analyzed using ANOVA test with SPSS-15.

Results

The highest prevalence rate of health-risk behaviors of students included: failing to drink natural fruit juice (53.1%), failing to wear a seat belt (43.0%), sitting in a car while the driver is sending message or emails (43.0%), failing to drink milk daily (36.0%), lack of minimum daily physical activity 37.0%, and watching TV more than 3 hours a day (35.0%). On average, the number of health-risk behaviors among under study students was 1.47. Additionally, the ANOVA showed a statistically significant difference in the average number of health-risk behaviors of adolescents in families with high economic status, those who never talked with their parents or those who had physical relations with the opposite sex (p<0.001).

Conclusion

It is suggested that attention be paid to emphasizing the pattern of healthy eating, increasing physical activity, and reducing unsafe behaviors in adolescents; moreover, behavioral consultation should be given regarding relationships with the opposite sex. Furthermore, more attention must be paid to the familiar behavior patterns and the relationships in school health programs.

Heroin Use and Drug Injection among Youth Also Misusing Prescription Drugs

OBJECTIVES

We identified the prevalence of nonmedical prescription drug use and its relationship to heroin and injection drug use in 4 nationally representative samples of adolescents.

METHODS

We used the most recent data (2009-2015) from the Youth Risk Behavior Surveillance System (Ntotal= 61,132). Prevalence rates and 95% confidence intervals for prescription drug misuse, heroin use, and injection drug use were calculated across time points, sex, and race/ethnicity subgroups. Using odds ratios, we determined the likelihood of youth reporting nonmedical prescription drug use also reporting heroin and drug injection.

RESULTS

In 2015, one in 6 adolescents reported recent prescription drug misuse. High rates of nonmedical prescription drug use persisted or increased among Hispanic boys, black boys, and "other" youth, while declining among white youth. Youth who used prescription drugs nonmedically at least once were 17.5 times more likely to have used heroin (CI: 13.7, 22.4) and 14.6 times more likely to have injected drugs (CI: 11.2, 19.2) in their lifetime.

CONCLUSIONS

Public health programming focused on reducing prescription drug misuse also may reduce youth engagement in heroin and/or injection drug use. Preventive efforts to support communities of color in reducing rates of prescription drug misuse are crucial.

Social-demographic shift in drug users at the first-ever- methadone maintenance treatment in Wuhan, China

The methadone maintenance treatment (MMT) has been initiated in Wuhan, China since early 2006. To understand the social-demographic, behavioral, and infectious diseases characteristics of drug users enrolled in their first-ever-MMT between 2006 and 2015, a retrospective observational study was implemented to also provide evidence for health policy-decisions to reduce harm and control disease. Pearson chi-square tests and t-tests were used to assess significant differences between two 5-year periods, 2006-2010 and 2011-2015. We observed increases in the mean age (38.65 vs. 42.43 years, P < 0.001), mean age of initial opioid drug use (28.18 vs. 31.07 years, P < 0.001), employment (11.9% vs. 30.7%, P < 0.001), married/co-habiting (42.4% vs. 47.8%, P < 0.001), and declines in higher education level (93.6% vs. 84.8%, P < 0.001), injection (82.3% vs. 75.1%, P < 0.001), syringe sharing (27.7% vs. 9.9%, P < 0.001), HCV infection rates (72.9% vs. 70.5%, P = 0.017). The number of drug users enrolling each year reduced following a continuous rapid growth in the first 3 years. The findings imply for adjusting in treatment services and allocation of resources to respond to emerging trends. In addition, the data will also be helpful for identifying needs and getting a baseline insight of the social-demographic and behavioral characteristics of the opioid abusers in the area.

Definitions of Risky and Problematic Cannabis Use: A Systematic Review

Although cannabis is widely used, it remains unclear which consumption patterns are more likely to produce future consequences (risky/hazardous use) or current damage (problematic/harmful use). This unresolved issue contributes to cannabis public health implications. In order to facilitate further consensus, this review analyzes previously used definitions in the literature.

METHODS

This systematic review was performed following the PRISMA guidelines. Articles published before October 2015 in the Medline, Scopus-Elsevier, ISI-Web of Knowledge and Cochrane databases and fulfilling a-priori decided criteria were retrieved. Definitions in preselected websites of national and international organizations addressing drug problems were also included.

RESULTS

Definitions identified in articles (n = 46) and official websites (n = 3) widely varied from each other. Weekly cannabis use was mostly considered risky. Problematic cannabis use was mostly described with the Cannabis Abuse and Screening Test. Evidence-based definitions as well as information on quantities consumed, time-frames and special considerations for risky groups were very limited.

CONCLUSIONS

Working on official definitions is highly necessary as criteria used remain incomplete, leading to increased confusion in the field. Recommendations to improve existing definitions are given.

Meeting Youth Where They Are: Substance Use Disorder Treatment in Schools

Providing school-based mental health treatment offers an opportunity to reach a greater number of affected youth by providing services in the setting where youth spend the majority of their time. In some contexts, even a single session of assessment has been linked with significant decreases in substance use; however, more robust treatments are likely needed to sustain these decreases over time. Empirically based individual and group treatments designed for delivery in clinic settings can readily be adapted for implementation in school settings. School-based delivery of substance use services offers an important opportunity to bridge a significant gap in services.

Adolescent Health Interventions: Conclusions, Evidence Gaps, and Research Priorities

Adolescent health care is challenging compared to that of children and adults, due to their rapidly evolving physical, intellectual, and emotional development. This paper is the concluding paper for a series of reviews to evaluate the effectiveness of interventions for improving adolescent health and well-being. In this paper, we summarize the evidence evaluated in the previous papers and suggest areas where there is enough existing evidence to recommend implementation and areas where further research is needed to reach consensus. Potentially effective interventions for adolescent health and well-being include interventions for adolescent sexual and reproductive health, micronutrient supplementation, nutrition interventions for pregnant adolescents, interventions to improve vaccine uptake among adolescents, and interventions for substance abuse. Majority of the evidence for improving immunization coverage, substance abuse, mental health, and accidents and injury prevention comes from high-income countries. Future studies should specifically be targeted toward the low- and middle-income countries with long term follow-up and standardized and validated measurement instruments to maximize comparability of results. Assessment of effects by gender and socioeconomic status is also important as there may be differences in the effectiveness of certain interventions. It is also important to recognize ideal delivery platforms that can augment the coverage of proven adolescent health-specific interventions and provide an opportunity to reach hard-to-reach and disadvantaged population groups.

The burden of disease attributable to cannabis use in Canada in 2012

BACKGROUND AND AIMS

Cannabis use is associated with several adverse health effects. However, little is known about the cannabis-attributable burden of disease. This study quantified the age-, sex- and adverse health effect-specific cannabis-attributable (1) mortality, (2) years of life lost due to premature mortality (YLLs), (3) years of life lost due to disability (YLDs) and (4) disability-adjusted life years (DALYs) in Canada in 2012.

DESIGN

Epidemiological modeling.

SETTING

Canada.

PARTICIPANTS

Canadians aged ≥ 15 years in 2012.

MEASUREMENTS

Using comparative risk assessment methodology, cannabis-attributable fractions were computed using Canadian exposure data and risk relations from large studies or meta-analyses. Outcome data were obtained from Canadian databases and the World Health Organization. The 95% confidence intervals (CIs) were computed using Monte Carlo methodology.

FINDINGS

Cannabis use was estimated to have caused 287 deaths (95% CI = 108, 609), 10,533 YLLs (95% CI = 4760, 20,833), 55,813 YLDs (95% CI = 38,175, 74,094) and 66,346 DALYs (95% CI = 47,785, 87,207), based on causal impacts on cannabis use disorders, schizophrenia, lung cancer and road traffic injuries. Cannabis-attributable burden of disease was highest among young people, and males accounted for twice the burden than females. Cannabis use disorders were the most important single cause of the cannabis-attributable burden of disease.

CONCLUSIONS

The cannabis-attributable burden of disease in Canada in 2012 included 55,813 years of life lost due to disability, caused mainly by cannabis use disorders. Although the cannabis-attributable burden of disease was substantial, it was much lower compared with other commonly used legal and illegal substances. Moreover, the evidence base for cannabis-attributable harms was smaller.

SBIRT-A: Adapting SBIRT to Maximize Developmental Fit for Adolescents in Primary Care

The Screening, Brief Intervention and Referral to Treatment (SBIRT) model is widely recommended as part of routine visits in pediatric primary care despite a dearth of evidence on its effectiveness, feasibility, and developmental appropriateness for adolescents in this setting. The purpose of this article is to explicate ways that SBIRT may be tailored to better serve adolescents in primary care under a set of recommended adaptations that we refer to collectively as SBIRT-A or Screening, Brief Intervention, and Referral to Treatment for Adolescents. Each component of the SBIRT-A framework incorporates recommendations to optimize developmental fit with adolescents based on extant empirical research, developmental theory, and well-documented barriers to service delivery in primary care. Commonalities across proposed adaptations include reliance upon proactive methods to identify and engage youth; innovation in service delivery aimed at improving the consistency and reach of interventions; and a family-focused approach to engagement, assessment, and intervention. Specific recommendations include taking advantage of every clinical encounter with the family to screen, involving caregivers in assessments and brief interventions, leveraging technology to administer brief interventions and booster sessions, and patient- and family-centered procedures for treatment referral and engagement. The adaptations proposed in this article have the potential to enhance the detection of adolescents with SU problems in primary care, the consistency of intervention provision, and engagement of this typically recalcitrant population into appropriate treatment.

Brief school-based interventions and behavioural outcomes for substance-using adolescents

BACKGROUND

Adolescent substance use is a major problem in and of itself, and because it acts as a risk factor for other problem behaviours. As substance use during adolescence can lead to adverse and often long-term health and social consequences, it is important to intervene early in order to prevent progression to more severe problems. Brief interventions have been shown to reduce problematic substance use among adolescents and are especially useful for individuals who have moderately risky patterns of substance use. Such interventions can be conducted in school settings. This review set out to evaluate the effectiveness of brief school-based interventions for adolescent substance use.

OBJECTIVES

To evaluate the effectiveness of brief school-based interventions in reducing substance use and other behavioural outcomes among adolescents compared to another intervention or assessment-only conditions.

SEARCH METHODS

We conducted the original literature search in March 2013 and performed the search update to February 2015. For both review stages (original and update), we searched 10 electronic databases and six websites on evidence-based interventions, and the reference lists of included studies and reviews, from 1966 to February 2015. We also contacted authors and organisations to identify any additional studies.

SELECTION CRITERIA

We included randomised controlled trials that evaluated the effects of brief school-based interventions for substance-using adolescents.The primary outcomes were reduction or cessation of substance use. The secondary outcomes were engagement in criminal activity and engagement in delinquent or problem behaviours related to substance use.

DATA COLLECTION AND ANALYSIS

We used the standard methodological procedures outlined by The Cochrane Collaboration, including the GRADE approach for evaluating the quality of evidence.

MAIN RESULTS

We included six trials with 1176 adolescents that measured outcomes at different follow-up periods in this review. Three studies with 732 adolescents compared brief interventions (Bls) with information provision only, and three studies with 444 adolescents compared Bls with assessment only. Reasons for downgrading the quality of evidence included risk of bias of the included studies, imprecision, and inconsistency. For outcomes that concern substance abuse, the retrieved studies only assessed alcohol and cannabis. We generally found moderate-quality evidence that, compared to information provision only, BIs did not have a significant effect on any of the substance use outcomes at short-, medium-, or long-term follow-up. They also did not have a significant effect on delinquent-type behaviour outcomes among adolescents. When compared to assessment-only controls, we found low- or very low-quality evidence that BIs reduced cannabis frequency at short-term follow-up in one study (standardised mean difference (SMD) -0.83; 95% confidence interval (CI) -1.14 to -0.53, n = 269). BIs also significantly reduced frequency of alcohol use (SMD -0.91; 95% CI -1.21 to -0.61, n = 242), alcohol abuse (SMD -0.38; 95% CI -0.7 to -0.07, n = 190) and dependence (SMD -0.58; 95% CI -0.9 to -0.26, n = 190), and cannabis abuse (SMD -0.34; 95% CI -0.65 to -0.02, n = 190) at medium-term follow-up in one study. At long-term follow-up, BIs also reduced alcohol abuse (SMD -0.72; 95% CI -1.05 to -0.40, n = 181), cannabis frequency (SMD -0.56; 95% CI -0.75 to -0.36, n = 181), abuse (SMD -0.62; 95% CI -0.95 to -0.29, n = 181), and dependence (SMD -0.96; 95% CI -1.30 to -0.63, n = 181) in one study. However, the evidence from studies that compared brief interventions to assessment-only conditions was generally of low quality. Brief interventions also had mixed effects on adolescents' delinquent or problem behaviours, although the effect at long-term follow-up on these outcomes in the assessment-only comparison was significant (SMD -0.78; 95% CI -1.11 to -0.45).

AUTHORS' CONCLUSIONS

We found low- or very low-quality evidence that brief school-based interventions may be more effective in reducing alcohol and cannabis use than the assessment-only condition and that these reductions were sustained at long-term follow-up. We found moderate-quality evidence that, when compared to information provision, brief interventions probably did not have a significant effect on substance use outcomes. It is premature to make definitive statements about the effectiveness of brief school-based interventions for reducing adolescent substance use. Further high-quality studies examining the relative effectiveness of BIs for substance use and other problem behaviours need to be conducted, particularly in low- and middle-income countries.

Staying in the 'sweet spot': A resilience-based analysis of the lived experience of low-risk drinking and abstention among British youth

OBJECTIVE

The aim of this study was to understand how and why young people drink less or not at all when with their peers. Understanding the subjective experiences of moderate or non-drinkers may help identify protective processes facilitating resilience to cultural norm and influences that encourage excessive alcohol consumption among young people.

DESIGN

Semi-structured interviews were conducted with 25 moderate- or non-drinkers aged 17-25 years (13 young women) living in South East England. Interviews explored recent experiences of social situations and encounters that did or did not involve alcohol. Transcripts were analysed using Interpretative Phenomenological Analysis.

RESULTS

Analysis identified six conceptually coherent themes clustering within a superordinate theme of a healthy experience of moderate alcohol use or abstention: 'the sweet spot'. These themes were: feeling good in the body, feeling like you can be who you are, feeling like you belong, making a free choice, enjoying the moment, and feeling safe and secure.

CONCLUSIONS

This resilience-based analysis showed how non-drinking and moderate-drinking may be experienced as a positive and proactive choice. Understanding the subjective experiences of young people may aid development of specific, realistic interventions to promote moderate drinking and abstention among young people in drinking cultures.

The role of schools in substance use prevention and intervention

Schools provide an ideal setting for screening, brief interventions, and outpatient treatment for substance use disorders (SUD). Individual treatment for SUD is effective at decreasing substance use as well as substance-related harm. In some contexts, rather than being helpful, group interventions can result in harm to participants; therefore, individual treatment may be preferred. Early interventions for adolescents who are using alcohol and other drugs (AOD) are generally effective in decreasing frequency and quantity of AOD use as well as decreasing risky behaviors.

Driving under the influence of opioids among high school students in Atlantic Canada: prevalence, correlates, and the role of medical versus recreational consumption

OBJECTIVE

Employing a sample of 3655 senior students (grades 10 and 12, median ages of 16 and 18, respectively) in Atlantic Canada, this paper examines the risk factors associated with driving under the influence of opioids (DUIO), comparing medical versus recreational opioid users. The associations of DUIO with driving under the influence of alcohol, cannabis, and being a passenger of an impaired driver are also examined.

METHODS

Participants were drawn from the 2012 Student Drug Use Survey in the Atlantic Provinces, an anonymous cross-sectional survey of junior and senior high school students in three Atlantic Canadian provinces. Logistic regression techniques were employed in the analysis of unadjusted and adjusted models.

RESULTS

Among all senior students, the prevalence of DUIO in the past year was 4.3%. For those who had used a prescription opioid at least once in the past year, the rate of DUIO was 14%, with a higher rate among medical and recreational users (25.1%) compared to those using opioids only for medical purposes (9.6%). The predictors of DUIO were higher SES, higher sensation seeking, lower parental attachment, and being a recreational prescription opioid user. DUIO was strongly associated with other risky driving and passenger behaviours among recreational opioid users.

CONCLUSIONS

DUIO is an emerging socio-legal and road safety issue, with implications for public health. Prescription opioid use intentions matter, with recreational users exhibiting most risky driving behaviour than medical users. Effort must be placed on educating prescription opioid users about potential impairment while driving.

Effectiveness of brief interventions as part of the screening, brief intervention and referral to treatment (SBIRT) model for reducing the non-medical use of psychoactive substances: a systematic review protocol

BACKGROUND

There is a significant public health burden associated with substance use in Canada. The early detection and/or treatment of risky substance use has the potential to dramatically improve outcomes for those who experience harms from the non-medical use of psychoactive substances, particularly adolescents whose brains are still undergoing development. The Screening, Brief Intervention, and Referral to Treatment model is a comprehensive, integrated approach for the delivery of early intervention and treatment services for individuals experiencing substance use-related harms, as well as those who are at risk of experiencing such harm.

METHODS

This article describes the protocol for a systematic review of the effectiveness of brief interventions as part of the Screening, Brief Intervention, and Referral to Treatment model for reducing the non-medical use of psychoactive substances. Studies will be selected in which brief interventions target non-medical psychoactive substance use (excluding alcohol, nicotine, or caffeine) among those 12 years and older who are opportunistically screened and deemed at risk of harms related to psychoactive substance use. We will include one-on-one verbal interventions and exclude non-verbal brief interventions (for example, the provision of information such as a pamphlet or online interventions) and group interventions. Primary, secondary and adverse outcomes of interest are prespecified. Randomized controlled trials will be included; non-randomized controlled trials, controlled before-after studies and interrupted time series designs will be considered in the absence of randomized controlled trials. We will search several bibliographic databases (for example, MEDLINE, EMBASE, CINAHL, PsycINFO, CORK) and search sources for grey literature. We will meta-analyze studies where possible. We will conduct subgroup analyses, if possible, according to drug class and intervention setting.

DISCUSSION

This review will provide evidence on the effectiveness of brief interventions as part of the Screening, Brief Intervention, and Referral to Treatment protocol aimed at the non-medical use of psychoactive substances and may provide guidance as to where future research might be most beneficial.