Few studies have compared knowledge of the specific health risks of cannabis across jurisdictions. This study aimed to examine perceptions of the health risks of cannabis in Canada and US states with and without legal non-medical cannabis. Cross-sectional data were collected from the 2018 and 2019 International Cannabis Policy Study online…

Aims: To estimate effects of brief substance use interventions delivered in general medical settings. Methods: A systematic review and meta-analysis of randomized trials conducted since 1990 of brief substance use interventions in patients of any age or severity level recruited in general medical settings. Primary outcomes were any measure of…

This study identifies new areas for risk-reduction strategies and research with regular cannabis users. Participants at a cannabis advocacy event in the Midwestern USA completed a survey including items from the Behavioral Risk Factor Surveillance System. Most participants (70%) reported using cannabis to treat a medical condition, though a…

This exploratory study examined the knowledge, experience, attitude, and perceptions of drugs reported by international students from mainland China (N = 97) studying on the West Coast of the U.S. and Canada. Chinese students currently constitute the largest group of international students at universities on the West Coast, which is also the…

This study used data from 5,382 adolescents from the 1997 United States (US) National Longitudinal Survey of Youth (NLSY97) to investigate developmental pathways of alcohol use, marijuana use, sexual risk behaviors, and delinquency across ages 14 to 20; examine interrelationships among these risk behaviors across adolescence; and evaluate…

The efficacy of inoculation theory has been confirmed by decades of empirical research, yet optimizing its effectiveness remains a vibrant line of investigation. The present research turns to psychological reactance theory for a means of enhancing the core mechanisms of inoculation--threat and refutational preemption. Findings from a multisite…

The national Youth Risk Behavior Survey (YRBS) monitors priority health risk behaviors that contribute to the leading causes of death, disability, and social problems among youth and adults in the United States. The national YRBS is conducted every two years during the spring semester and provides data representative of 9th through 12th grade…

Objective: Early-onset cannabis use has been associated with later use/abuse, mental health problems (psychosis, depression), and abnormal development of cognition and brain function. During adolescence, ongoing neurodevelopmental maturation and experience shape the neural circuitry underlying complex cognitive functions such as memory and…

The National Survey on Drug Use and Health (NSDUH) is the primary source of information on the prevalence, patterns, and consequences of substance abuse among people age 12 and older. The survey is conducted every year by the Substance Abuse and Mental Health Services Administration (SAMHSA). The 2009 NSDUH, released September 16, 2010, shows…

Problem: Priority health-risk behaviors contribute to the leading causes of morbidity and mortality among youth and adults. Population-based data on these behaviors at the national, state, and local levels can help monitor the effectiveness of public health interventions designed to protect and promote the health of youth nationwide. Reporting…

Adolescence is an important period of physical, social, psychological, and cognitive growth. No longer children and not yet adults, adolescents make significant choices about their health and develop attitudes and health behaviors that continue into adulthood. Substance use disorders among adolescents can impede the attainment of important…

The national Youth Risk Behavior Survey (YRBS) monitors priority health risk behaviors that contribute to the leading causes of death, disability, and social problems among youth and adults in the United States. The national YRBS is conducted every two years during the spring semester and provides data representative of 9th through 12th grade…

The United States and the Netherlands have antithetical marijuana control policies. The United States' laws criminalize the possession of even small amounts of marijuana, while the Netherlands have maintained, over the past several decades, two relatively liberal marijuana policies implemented during the 1970s and 1980s. According to the…

The Monitoring the Future (MTF) project reports annually on levels and trends in self-reported substance use by secondary school students (e.g., Johnston, O'Malley, Bachman, & Schulenberg, 2009). The reports include subgroup comparisons, and these have revealed substantial differences among race/ethnicity groups, as well as some differences…

Objective: To study actual and perceived substance use in Canadian university students and to compare these rates with US peers. Participants: Students (N = 1,203) from a large Canadian university. Methods: Participants were surveyed using items from the National College Health (NCHA) Assessment of the American College Health Association…