title: Differentiating Common Predictors and Outcomes of Marijuana Initiation: A Retrospective Longitudinal Analysis.
abstract: This quasi-experimental secondary analysis, funded by NIDA, employed data from a national sample of 1,968 US adolescents, collected from 1999 to 2003, self-classified as resolutely anti-marijuana on the first two yearly assessments (T1 and 2). At T3, respondents remained resolute non-users, or had moved to vulnerable non-use or use. Analysis of variance indicated that users at T3 were significantly heavier users of tobacco and alcohol, and reported significantly less intense parental monitoring, than those who did not initiate marijuana use. Furthermore, categorizing non-users as either resolute or vulnerable revealed behavioral patterns that otherwise would have been unidentified. Implications for prevention are discussed.
authors.affiliation: a 1School of Behavioral and Organizational Science, Claremont Graduate University , Claremont, California, USA.
authors.forename: Jason T
authors.initials: JT
authors.lastname: Siegel
authors.affiliation: a 1School of Behavioral and Organizational Science, Claremont Graduate University , Claremont, California, USA.
authors.forename: William D
authors.initials: WD
authors.lastname: Crano
authors.affiliation: a 1School of Behavioral and Organizational Science, Claremont Graduate University , Claremont, California, USA.
authors.forename: Eusebio M
authors.initials: EM
authors.lastname: Alvaro
authors.affiliation: b 2Department of Psychology, Loyola Marymount University , Los Angeles, California, USA.
authors.forename: Andrew
authors.initials: A
authors.lastname: Lac
authors.affiliation: c 3Department of Psychology, California University of Pennsylvania , California, Pennsylvania.
authors.forename: Justin D
authors.initials: JD
authors.lastname: Hackett
authors.affiliation: a 1School of Behavioral and Organizational Science, Claremont Graduate University , Claremont, California, USA.
authors.forename: Zachary P
authors.initials: ZP
authors.lastname: Hohman
keywords: National Survey of Parents and Youth; alcohol; longitudinal; marijuana; tobacco; vulnerable non-users