Background and rationale Epidemiological evidence suggests that people who begin
experimenting with drugs of abuse during early adolescence are more likely to develop …

Substance use trajectories were examined from early adolescence to young adulthood
among a diverse sample of 998 youths. Analysis of longitudinal data from ages 12 to 24 …

Adolescent “storm and stress” has been a focal yet controversial developmental framework
for over a century. In the present article, we challenge the current perspective that storm and …

Adolescence is often described as a time of experimentation with risky or problem behaviors
(Arnett, 2000), and substance use is one such behavior that is initiated during this age …

This article provides an overview of adolescent substance abuse, including rates of use, risk
and protective factors, and demographic trends for various licit and illicit drugs. Most of this …

Background. Despite the prominence of comorbidity among substances and the recent
attention focused on trajectory‐based approaches to characterizing developmental change …

Longitudinal trajectories of marijuana use from adolescence into adulthood were examined
for adverse life-course outcomes among African-Americans and Puerto Ricans. Data for …

Background Historically, cannabis researchers have assumed a single mode and product of
cannabis (eg, smoking plant). However, patterns of use, products (eg, concentrates …

BACKGROUND: Despite the relatively high prevalence of marijuana use among college
students, little information exists regarding health outcomes associated with different use …

Background This descriptive study identified latent classes of longitudinal marijuana use
from ages 18 through 50 among a national sample; examined covariate associations with …