Evidence map›Paper›PMID 31183908›Full record

ArticleAddiction (Abingdon, England)2019

Associations between young adult marijuana outcomes and availability of medical marijuana dispensaries and storefront signage.

Regina A Shih, Anthony Rodriguez, Layla Parast, Eric R Pedersen, Joan S Tucker, Wendy M Troxel, Lisa Kraus, Jordan P Davis, Elizabeth J D'Amico

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 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing 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

38 citing papers in PubMed.

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  13. Examining indirect effects of advertising exposure on young adults' cannabis and nicotine vaping.Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors.

Regina A ShihRAND Corporation, Santa Monica, CA, USA.ORCID 0000-0003-0062-6356
Anthony RodriguezRAND Corporation, Santa Monica, CA, USA.
Layla ParastRAND Corporation, Santa Monica, CA, USA.ORCID 0000-0002-7288-1009
Eric R PedersenRAND Corporation, Santa Monica, CA, USA.ORCID 0000-0002-8017-6246
Joan S TuckerRAND Corporation, Santa Monica, CA, USA.ORCID 0000-0001-5024-0887
Wendy M TroxelRAND Corporation, Santa Monica, CA, USA.
Lisa KrausRAND Corporation, Santa Monica, CA, USA.
Jordan P DavisRAND Corporation, Santa Monica, CA, USA.
Elizabeth J D'AmicoRAND Corporation, Santa Monica, CA, USA.

Funding

Brief Voluntary Alcohol and Drug Intervention for Middle School YouthR01AA016577 · NIAAA · RAND CORPORATION · PI D'AMICO, ELIZABETH J. · 2007 to 2011
$4.5M
Adolescent AOD Use Trajectories: The Role of Race and EthnicityR01AA020883 · NIAAA · RAND CORPORATION · PI D'AMICO, ELIZABETH J. · 2012 to 2016
$3.5M
Objective and Perceived Neighborhood Characteristics and Cognitive DeclineR01AG043960 · NIA · RAND CORPORATION · PI SHIH, REGINA A · 2012 to 2014
$2.7M
NIAAA NIH HHS 1R01AA020883NIAAA NIH HHS R01 AA016577NIAAA NIH HHS R01 AA020883NIA NIH HHS R01 AG043960
6 · The paper itself

Abstract

aimsWe investigated associations between the density of medical marijuana dispensaries (MMDs) around young adults' homes and marijuana use outcomes.

designSecondary data analysis.

settingLos Angeles County, CA, USA.

participantsA total of 1887 participants aged 18-22 years, surveyed online in 2016-17. MEASUREMENTS: Outcomes were past-month marijuana use (number of days used, number of times each day), positive expectancies and perceived peer use. Density was measured as the total number of MMDs and number of MMDs with storefront signage indicative of marijuana sales, within 4 miles of respondents' homes.

findingsEighty-four per cent of respondents had 10 or more MMDs within 4 miles of their homes. Multiple linear regression analyses that adjusted for individual-level socio-demographic characteristics and neighborhood socio-economic status indicated that living near a higher number of MMDs was associated with greater number of days used in the past month [β = 0.025; 95% confidence interval (CI) = 0.001, 0.049; P = 0.04] and higher positive marijuana expectancies (β = 0.003; 95% CI = 0.001, 0.007; P = 0.04). Living near more MMDs with storefront signage had a four- to six-fold larger effect on number of times used per day and positive expectancies, respectively, compared with associations with the total MMD count. Adjusting for medical marijuana card ownership attenuated the association with number of days used in the past month and positive expectancies, and an unexpected association emerged between higher MMD density and fewer number of times used each day (β = -0.005; 95% CI = -0.009, -0.001; P = 0.03).

conclusionsFor young adults in Los Angeles County, living near more medical marijuana dispensaries (MMDs) is positively associated with more frequent use of marijuana within the past month and greater expectations of marijuana's positive benefits. MMDs with signage show stronger associations with number of times used each day and positive expectancies.

Indexed as

AdvertisingCommerceAdolescentCaliforniaConsumer BehaviorFemaleHumansMaleMarijuana UseMedical MarijuanaResidence CharacteristicsYoung AdultMedical MarijuanaDensitymarijuana usemedical marijuanaperceived peer usepositive expectanciessignageyoung adult

Identifiers

PMID31183908
PMCPMC12161288

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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.