occasions in the past 30 days, stratified by sex, race/ethnicity, and parental education.


FCU among US adolescents increased over the study period; the peak in 2010-2018 was 11.4% among 18-year old students. This increase was best explained by both period and cohort effects. Compared with respondents in 2005, adolescents surveyed in 2018 had period effects in FCU that were 1.6 times greater. Adolescents in younger birth cohorts (those born >1987) had a lower increase in FCU than those born prior to 1987. Results were consistent across sex, parent education, and race/ethnicity, with period effects indicating increasing FCU after 2005 and cohort effects indicating a lower magnitude of increase in more recent birth cohorts. Age and parental education disparities in FCU have increased over time, whereas race/ethnicity differences have converged over time; Black students were 0.67(95%C.I. 0.64-0.70) times as likely to use cannabis frequently as White students from 1991-2000, and 1.03(95%C.I. 0.98-1.09) times as likely from 2011-2018 (p-value for time interaction

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PMID: 31106501 DOI: 10.1111/add.14665 ShareLinkOut – more resourcesFull Text SourcesWileyMiscellaneousNCI CPTAC Assay Portal Supplemental Content Full text links

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