The aim of this study was to examine trends in cannabis use among Spanish students from 2006 to 2018 by sex, age, and sex and age combined. Data showed a global decrease both in a lifetime and frequent cannabis use between 2006 and 2018 but four-year comparisons revealed more variability within the specific sex-age groups. No change was found in…

Introduction The majority of epidemiologic research on adolescent non-medical anabolic-androgenic steroid (AAS) use was conducted in the 1990s and early 2000s, indicating a need to update evidence for the modern era. We aim to understand the prevalence of AAS use among US adolescents and assess associations between AAS use, sports participation,…

School truancy among teenagers remains a serious national problem, as evidenced by its significant association with school performance, psychological, and behavioral problems. Truancy is also positively associated with substance abuse. This study presents 18-month outcome data from a National Institute on Drug Abuse (NIDA)-funded controlled trial…

The purpose of this article is to investigate polysubstance use among college student-athletes and determine whether use is independent of gender, race, season status, and athletic division. College student-athletes responded to questions related to their past-30-day use of alcohol, tobacco, marijuana, and prescription drugs. Findings suggest that…

Among adolescents (ages 12-17) and young adults (ages 18-25) enrolled in Medicaid or the Children's Health Insurance Program (CHIP), 0.5% of adolescents had opioid use disorder (OUD), 3.0% had other risky opioid use, 3.4% had another substance use disorder, and 21.6% used other substances without disorder. Compared to adolescents, the prevalence…

The use of addictive substances by adolescents is a major public health concern; however, rural versus urban variations are poorly understood. The purpose of the current study was to examine rural-urban differences in the prevalence of recent use of 11 substances in grades 6 through 12 in a statewide sample of students from the Georgia Student…

Six specific hypotheses have been developed to account for why Caucasians have higher rates of drug use compared to African-Americans. This article utilizes data from a South Florida-based community study of 893 young adults (1998-2002) to test these hypotheses. Specifically, Caucasians (1) initiate drug use at younger ages than African-Americans…

The issue of delinquency among truant youths is insufficiently documented in the literature. There is a need to elucidate this issue, and assess the efficacy of interventions to reduce this problem behavior. The present National Institute on Drug Abuse (NIDA)-funded study addressed this gap by examining the impact of a Brief Intervention (BI),…

Purpose: Prevalence estimates for drug use health risk behaviors among high school students are widely available, but relatively few studies describe how and to what extent these risk behaviors occur together. Furthermore, little research has examined whether the co-occurrence of health risk behaviors varies by key demographic characteristics such…

This study examines the feasibility of recruiting and retaining adolescents and young adults with frequent cannabis use for a 2-week momentary sampling study of cannabis use. Participants responded to random signals on a handheld computer with reports of their use. Participants also initiated reports pre- and post-cannabis use. Participants had…

This study utilized data drawn from a study of 980 adolescents living in Tijuana, Mexico, in February 2009 to examine whether parental monitoring had a moderating impact on the influence of peer pro-drug norms on lifetime and past-30-day alcohol and cigarette use among a group of adolescents living along the United States-Mexico border. The…

This study aimed to examine (a) the impact of the change in the "Diagnostic and Statistical Manual of Mental Disorders" ("DSM") from a categorical to dimensional classification of substance use diagnoses, (b) the elimination of the legal criterion, and (c) the inclusion of a craving criterion in the "DSM"-5.…

This study examined illicit substance use among 1,004 adolescents, ages 11-21, involved with the Child Welfare System (CWS) and followed from 1999 to 2007. By the time they reached transition age, more than 60% of the sample had used an illicit substance in their lifetime. Predictors of regular use during adolescence were having a prior CWS…

Substance use and sexual risk behaviors are common among adolescents, but research has focused attention on alcohol use. Much less is known about the relationship of marijuana use and sexual risk behavior among high-risk, especially truant, youths. We report interim findings from a NIDA-funded experimental, brief intervention (BI) study involving…

A range of research has recognized the benefits of optimism in a variety of health-related outcomes. Pessimism has received less attention but may be a distinct concept that is uniquely related to certain health behaviors, including drug use. The present study examined relationships between optimism and pessimism and alcohol use trajectories of…