Background Marijuana use is increasingly widespread among adolescents and young
adults; however, few studies have examined longitudinal trajectories of marijuana use …

This study examined how substance use trajectories from ages 15 to 23 in a community
sample (N= 921) were related to educational pathways. Rates of heavy drinking converged …

ABSTRACT BACKGROUND We tested the effect of initiating marijuana and alcohol use at
varying frequencies on academic indices. METHODS In a sample of 26,475 grade 9‐12 …

Objective The present study is a prospective examination of the relationship between
regular marijuana use from adolescence through young adulthood and mental health …

The purposes of this study were to identify trajectory groups of frequent marijuana use
during emerging adulthood; distinguish among trajectory groups according to demographic …

Some evidence suggests that youth who use marijuana heavily during adolescence may be
particularly prone to health problems in later adulthood (eg, respiratory illnesses, psychotic …

BACKGROUND: There is growing recognition that marijuana use among college students is
associated with marijuana-related problems. Yet little work has examined whether use is …

Background: Past studies have shown that heavy marijuana use can impact student
outcomes. Frequent use and misuse of marijuana have been associated with a range of …

Although several studies have shown that marijuana use can adversely affect academic
achievement among adolescents, less research has focused on its impact on postsecondary …

Rising marijuana use and its lowered perceived risk among adolescents highlight the
importance of examining patterns of marijuana use over time. This study identified …