Evidence map›Paper›PMID 32737023›Full record

ArticleCMAJ open

Trends and correlates of cannabis use in Canada: a repeated cross-sectional analysis of national surveys from 2004 to 2017.

Dana E Lowry, Daniel J Corsi

Open access · diamondAbstract read
In one paragraph

Article in CMAJ open. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
6.2field-weighted citation impact, top 3% of its field
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

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 50 citations in OpenAlex.

  1. Pooled it
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  11. Impact of substance-related harms on injury hospitalizations in Canada, from 2010 to 2020.Health promotion and chronic disease prevention in Canada : research, policy and practice · 2023
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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

2 authors at 1 institution in 1 country.

Dana E LowryOttawa Hospital Research Institute (Lowry, Corsi), University of Ottawa; Faculty of Medicine (Corsi), School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ont.
Daniel J CorsiOttawa Hospital Research Institute (Lowry, Corsi), University of Ottawa; Faculty of Medicine (Corsi), School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ont. dcorsi@ohri.ca.
Ottawa Hospital · CA

Funding

CIHR
6 · The paper itself

Abstract

backgroundCannabis is the most widely used drug in Canada. We examined the trends in past-year cannabis consumption by sociodemographic and geographic characteristics.

methodsWe conducted a repeated cross-sectional analysis of the Canadian Tobacco Use Monitoring Survey, the Canadian Tobacco, Alcohol and Drugs Survey and the Canadian Alcohol and Drug Use Monitoring Survey from 2004 to 2017. Respondents were aged 15 years and older. Past-year cannabis use was analyzed using multivariable logistic regression and segmented logistic regression.

resultsWe analyzed 289 823 respondents (51% female) between 2004 and 2017. Between 2004 and 2017, the overall prevalence of cannabis use increased from 12.2% (95% confidence interval [CI] 11.0%-13.5%) to 18.7% (95% CI 16.2%-21.5%) among men and from 6.6% (95% CI 5.9%-7.4%) to 11.1% (95% CI 9.4%-13.0%) among women. The crude rate of change was greater between 2011 and 2017 than that between 2004 and 2011 in men (odds ratio [OR] per annual change: 1.08, 95% CI 1.05-1.11) and women (OR 1.11, 95% CI 1.07-1.15). After adjustment for age, education, tobacco smoking and province, the 2011-2017 trend was stronger in men (adjusted OR 1.24, 95% CI 1.05-1.46), but not in women (adjusted OR 1.13, 95% CI 0.93-1.37). Cannabis use was associated with tobacco smoking (OR 4.94, 95% CI 4.65-5.25). Heterogeneity was found in cannabis use trends by age, education and province. Cannabis use decreased among respondents aged 15-19 years and increased in other age groups.

interpretationCannabis consumption in Canada has increased and varies by sex, age, level of education and geography. Increases vary by sociodemographic factors and may be faster among certain groups. Further studies are warranted post-legalization.

Indexed as

AdolescentAdultAgedAge FactorsCanadaCross-Sectional StudiesFemaleHumansLogistic ModelsMaleMarijuana AbuseMarijuana SmokingMiddle AgedOdds RatioPregnancyPrevalence

Identifiers

PMID32737023
PMCPMC7428071
OpenAlexW3046763880

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.