Marijuana use trajectories during the post-college transition: health outcomes in young adulthood.

Abstract:

BACKGROUND:Despite the relatively high prevalence of marijuana use among college students, little information exists regarding health outcomes associated with different use patterns or trajectories. METHODS:Seven annual personal interviews (years 1-7) were administered to 1253 individuals, beginning in their first year in college. Growth mixture modeling was used to identify trajectories of marijuana, alcohol, and tobacco use frequency during years 1-6. Logistic regression was used to evaluate the relationship between marijuana use trajectories and several year 7 health outcomes, holding constant year 1 health, demographics, and alcohol and tobacco use trajectories. RESULTS:Six marijuana use trajectories were identified: non-use (71.5% (wt) of students), low-stable (10.0% (wt)), late-increase (4.7% (wt)), early-decline (4.3% (wt)), college-peak (5.4% (wt)), and chronic (4.2% (wt)). The six marijuana trajectory groups were not significantly different on year 1 health-related variables, but differed on all ten year 7 health outcomes tested, including functional impairment due to injury, illness, or emotional problems; general health rating; psychiatric symptoms; health-related quality of life; and service utilization for physical and mental health problems. Non-users fared significantly better than most of the marijuana-using trajectory groups on every outcome tested. Chronic and late-increase users had the worst health outcomes. CONCLUSIONS:Marijuana use patterns change considerably during college and the post-college period. Marijuana-using students appear to be at risk for adverse health outcomes, especially if they increase or sustain a frequent pattern of use.

journal_name

Drug Alcohol Depend

authors

Caldeira KM,O'Grady KE,Vincent KB,Arria AM

doi

10.1016/j.drugalcdep.2012.02.022

subject

Has Abstract

pub_date

2012-10-01 00:00:00

pages

267-75

issue

3

eissn

0376-8716

issn

1879-0046

pii

S0376-8716(12)00074-9

journal_volume

125

pub_type

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