Evidence map›Paper›PMID 31106501›Full record

ArticleAddiction (Abingdon, England)2019

Age, period and cohort effects in frequent cannabis use among US students: 1991-2018.

Ava D Hamilton, Joy Bohyun Jang, Megan E Patrick, John E Schulenberg, Katherine M Keyes

Abstract read
In one paragraph

Article in Addiction (Abingdon, England), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

29 citing papers in PubMed.

  1. Estimating Price Elasticity of Cannabis Use Among U.S. Adolescents: Evidence From States With Recreational Cannabis Commercialization.The Journal of adolescent health : official publication of the Society for Adolescent Medicine · 2026
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  7. Multiple Discrimination and Substance Use Intention in Late Childhood: Findings From the Adolescent Brain Cognitive Development (ABCD) Study.The Journal of adolescent health : official publication of the Society for Adolescent Medicine · 2024
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Ava D HamiltonDepartment of Epidemiology, Columbia University, New York, NY, USA.ORCID 0000-0003-1840-1534
Joy Bohyun JangInstitute for Social Research, University of Michigan, Ann Arbor, MI, USA.
Megan E PatrickInstitute for Translational Research in Children's Mental Health and Institute of Child Development, University of Minnesota, Minneapolis, MN, USA.
John E SchulenbergInstitute for Social Research, University of Michigan, Ann Arbor, MI, USA.
Katherine M KeyesDepartment of Epidemiology, Columbia University, New York, NY, USA.ORCID 0000-0002-5624-021X

Funding

Monitoring the Future: Drug Use & Lifestyles of American Youth (Supp1: Nicotine Pouch and E-cigarette Use Among US Adolescents: National Estimates of Brand Use and Flavor Preferences)R01DA001411 · NIDA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI Richard A Miech · 1985 to 2026
$144.9M
As adolescent substance use declines, internalizing symptoms increase: identifying high-risk substance using groups and the role of social media, parental supervision, and unsupervised timeR01DA048853 · NIDA · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI KEYES, KATHERINE M. · 2019 to 2023
$2.0M
Dynamic Links Between Risk Factors, Substance Use, and Consequences: Ages 18-35R01DA037902 · NIDA · UNIVERSITY OF MINNESOTA · PI PATRICK, MEGAN E. · 2015 to 2018
$1.5M
Race, alcohol consumption and vehicle crashes: an epidemiologic paradoxK01AA021511 · NIAAA · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI KEYES, KATHERINE M. · 2013 to 2017
$904k
NIAAA NIH HHS K01 AA021511NIDA NIH HHS R01 DA001411NIDA NIH HHS R01 DA037902NIDA NIH HHS R01 DA048853
6 · The paper itself

Abstract

BACKGROUND AND

aimsAs the legal status of cannabis changes across the United States and modes of administration expand, it is important to examine the potential impact on adolescent cannabis use. This study aimed to assess changes in prevalence of frequent cannabis use in adolescents in the United States and how far this varies by age and cohort.

designAnalysis of Monitoring the Future, a nationally representative annual survey of 8th-, 10th- and 12th-grade students in the United States conducted from 1991 to 2018.

settingIn-school surveys completed by US adolescents.

participantsA total of 1 236 159 8th-, 10th- and 12th-graders; 51.5% female, 59.6% non-Hispanic white, 12.3% non-Hispanic black, 13.4% Hispanic and 14.7% other race/ethnicity. MEASUREMENTS: Frequent cannabis use (FCU), defined as six or more occasions in the past 30 days, stratified by sex, race/ethnicity and parental education.

findingsFCU among US adolescents increased over the study period; the peak in 2010-18 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 > 1988) had a lower increase in FCU than those born prior to 1988. 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% confidence interval (CI) = 0.64-0.70] times as likely to use cannabis frequently as white students from 1991 to 2000, and 1.03 (95% CI = 0.98-1.09) times as likely from 2011 to 2018 (P-value for time interaction < 0.001).

conclusionsThe prevalence of frequent cannabis use (FCU) increased from 1991 to 2018 among older adolescents in the United States. Racial/ethnic differences in FCU converged, whereas parental education differences have diverged.

Indexed as

CannabisAdolescentAge FactorsCohort EffectCohort StudiesEthnicityFemaleHumansMaleMarijuana UsePrevalenceStudentsSurveys and QuestionnairesUnited StatesAdolescent cannabis useage-period-cohortfrequent cannabis useparental educationrace/ethnicitytime trends

Identifiers

PMID31106501
PMCPMC6732038

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.