Evidence map›Paper›PMID 40602693›Full record

ArticleAmerican journal of preventive medicine2025

Characteristics and Trends in Child Cannabis Exposures During Legalization in California.

Laura A Schmidt, Laurie M Jacobs, Ellicott C Matthay, James Roake, Justin Lewis, Raymond Ho, Dorie E Apollonio

Abstract read
In one paragraph

Article in American journal of preventive medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Laura A SchmidtPhilip R. Lee Institute for Health Policy Studies, School of Medicine, University of California San Francisco, San Francisco, California; Department of Humanities and Social Sciences, School of Medicine, University of California San Francisco, San Francisco, California. Electronic address: Laura.schmidt@ucsf.edu.
Laurie M JacobsPhilip R. Lee Institute for Health Policy Studies, School of Medicine, University of California San Francisco, San Francisco, California.
Ellicott C MatthayCenter for Opioid Epidemiology and Policy, Division of Epidemiology, Department of Population Health, New York University Grossman School of Medicine, New York, New York.
James RoakePhilip R. Lee Institute for Health Policy Studies, School of Medicine, University of California San Francisco, San Francisco, California.
Justin LewisCalifornia Poison Control System, School of Pharmacy, University of California San Francisco, San Francisco, California; School of Pharmacy, University of California San Francisco, San Francisco, California.
Raymond HoCalifornia Poison Control System, School of Pharmacy, University of California San Francisco, San Francisco, California; School of Pharmacy, University of California San Francisco, San Francisco, California.
Dorie E ApollonioSchool of Pharmacy, University of California San Francisco, San Francisco, California; Graduate Institute of International and Development Studies, Geneva, Switzerland.

Funding

Testing Medical Marijuana's Unintended Consequences for Youth and Young AdultsR01DA034091 · NIDA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI SCHMIDT, LAURA A, SPETZ, JOANNE E. · 2012 to 2015
$1.6M
Joint Impacts of Local Alcohol and Cannabis Laws and Outlet Densities on ViolenceR00AA028256 · NIAAA · NEW YORK UNIVERSITY SCHOOL OF MEDICINE · PI MATTHAY, ELLICOTT COLSON · 2022 to 2024
$747k
Joint impacts of local alcohol and cannabis policies and outlet densities on violenceK99AA028256 · NIAAA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MATTHAY, ELLICOTT COLSON · 2020 to 2021
$342k
NIAAA NIH HHS K99 AA028256NIAAA NIH HHS R00 AA028256NIDA NIH HHS R01 DA034091
6 · The paper itself

Abstract

introductionIn 2016, California legalized cannabis for adult recreational use; after recreational sales began in 2018, it became the largest retail market worldwide. This study profiled specific risks and prevention opportunities across age groups and examined changes in medically significant child cannabis exposures before and after legalization.

methodsResearchers conducted analyses, including interrupted time series, to examine 1,695 California Poison Control System reports of cannabis exposure in children aged 0-17 years from 2010 to 2020. Analyses were confined to moderate and severe exposures, identified by California Poison Control System toxicologists as requiring medical attention.

resultsMonthly rates of moderate/severe cannabis exposure per million children increased after legalization (β=0.06; 95% CI=0.05, 0.08), especially in children aged <5 years. Fourteen percent required critical care admission. Exposures were primarily unintentional in younger children (87.7%-99.2%) and intentional in adolescents (85.5%). Across all ages, most exposures occurred in the home (94.0%) and involved edible products (83.5%). An analysis of packaging on edible brands frequently cited in health records found that most could be easily mistaken for popular candies and snack foods.

conclusionsAfter cannabis legalization in California, reports of child cannabis exposures requiring medical attention increased significantly. Most reported cannabis exposures occurred in the home through the ingestion of edible products, often packaged to look like popular candy and snack food brands. To prevent these harms, cannabis legalization should be accompanied by robust marketing and packaging regulations (e.g., plain labels, larger warning labels). Secondary prevention should focus on educating parents and caregivers on safe cannabis storage in the home.

Indexed as

CannabisLegislation, DrugAdolescentCaliforniaChildChild, PreschoolFemaleHumansInfantInfant, NewbornInterrupted Time Series AnalysisMalePoison Control Centers

Identifiers

PMID40602693
PMCPMC13004536

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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.