Background: Many studies report a positive association between smoking and mental
illness. However, the literature remains mixed regarding the direction of this association. We …

Introduction The prevalence of electronic cigarette (EC) use has risen dramatically among
adolescents and young adults (AYA, ages 12–26) over the past decade. Despite extensive …

This practical introduction to second-order and growth mixture models using Mplus
introduces simple and complex techniques through incremental steps. The authors extend …

Data from the National Institute on Drug Abuse (NIDA) and the Centers for Disease Control
and Prevention (CDC) reveal high numbers of adolescent substance use in the United …

While prevalence rates for alcohol use and related disorders differ widely between adult
men and women, male and female adolescents do not exhibit the same disparity in alcohol …

Given the rise in teenage use of electronic nicotine delivery systems (“vaping”) in
congruence with the increasing numbers of drug-related emergencies, it is critical to expand …

Background It is well-established that smoking and depression are associated in
adolescents, but the temporal ordering of the association is subject to debate. Methods …

The main aim of this article is to investigate whether there is a significant long-term
association between bullying at school and drug use later in life. A meta-analysis is …

Gene–environmental interaction (G× E) between a common functional polymorphism in the
promoter region of the serotonin transporter gene (5-HTT) and environmental adversity on …

▪ Abstract The conceptual and methodological issues involved in the study of gene-
environment correlations (rGE) and interactions (GxE) are discussed in historical context …