Evidence map›Paper›PMID 31015080›Full record

ArticleThe International journal on drug policy2019

Prevalence and correlates of selling illicit cannabis among people who use drugs in Vancouver, Canada: A ten-year prospective cohort study.

Hudson Reddon, Danya Fast, Kora DeBeck, Dan Werb, Kanna Hayashi, Evan Wood, M-J Milloy

Abstract read
In one paragraph

Article in The International journal on drug policy, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
–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

9 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. 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.

Hudson ReddonBritish Columbia Centre on Substance Use, 1045 Howe Street, Vancouver, BC, V6Z 2A9, Canada; CIHR Canadian HIV Trials Network, 588-1081 Burrard Street, Vancouver, BC, V6B 3E6, Canada.
Danya FastBritish Columbia Centre on Substance Use, 1045 Howe Street, Vancouver, BC, V6Z 2A9, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada.
Kora DeBeckBritish Columbia Centre on Substance Use, 1045 Howe Street, Vancouver, BC, V6Z 2A9, Canada; School of Public Policy, Simon Fraser University, SFU Harbour Centre, 515 West Hastings Street, Vancouver, BC, V6B 5K3, Canada.
Dan WerbDivision of Global Public Health, Department of Medicine, University of California San Diego, La Jolla, CA, 92093- 0507, USA; Centre for Urban Health Solutions, St. Michael's Hospital, Toronto, ON, M5B 1W8, Canada.
Kanna HayashiFaculty of Health Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.
Evan WoodBritish Columbia Centre on Substance Use, 1045 Howe Street, Vancouver, BC, V6Z 2A9, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada.
M-J MilloyBritish Columbia Centre on Substance Use, 1045 Howe Street, Vancouver, BC, V6Z 2A9, Canada; CIHR Canadian HIV Trials Network, 588-1081 Burrard Street, Vancouver, BC, V6B 3E6, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada. Electronic address: bccsu-mjsm@bccsu.ubc.ca.

Funding

Vancouver Drug Users Study: The Impacts of Evolving Drug Use Patterns on HIV/AIDSU01DA038886 · NIDA · UNIVERSITY OF BRITISH COLUMBIA · PI DEBECK, KORA, HAYASHI, KANNA · 2015 to 2024
$12.1M
Impacts of universal access to HIV/AIDS care among HIV+ injection drug usersU01DA021525 · NIDA · UNIVERSITY OF BRITISH COLUMBIA · PI MILLOY, M-J · 2017 to 2024
$4.3M
Preventing HIV by modifying the context for injecting initiationDP2DA040256 · NIDA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI WERB, DANIEL M · 2015 to 2015
$2.3M
CIHR CTN 222CIHR MOP–286532CIHR MSH-141971NIDA NIH HHS DP2 DA040256NIDA NIH HHS U01 DA021525NIDA NIH HHS U01 DA038886
6 · The paper itself

Abstract

backgroundThe illicit selling and use of cannabis is prevalent among marginalized people who use illicit drugs (PWUD). Given that participation in illicit drug markets has been previously associated with a range of health and social harms, we sought to examine the predictors of selling cannabis among PWUD in Vancouver, Canada, a setting with a de facto legalized cannabis market, on the eve of the planned implementation of legalized non-medical cannabis including measures to regulate the existing illicit market.

methodsMultivariable generalized estimating equations (GEE) logistic regression was used to analyze longitudinal factors associated with selling illicit cannabis among three prospective cohorts of PWUD between September 2005 and May 2015.

resultsAmong the 3258 participants included in this study, 328 (10.1%) reported selling illicit cannabis at baseline, and 46 (5.1%) initiated cannabis selling over the study period. In the multivariable analysis of the whole sample, factors significantly associated with selling cannabis included cannabis use (Adjusted Odds Ratio [AOR] = 4.05), dealing other drugs (AOR = 3.87), being male (AOR = 1.83), experiencing violence (AOR = 1.40), non-medical prescription opioid use (AOR = 1.32), non-custodial involvement in the criminal justice system (AOR = 1.31), being stopped by police (AOR = 1.30), crack use (AOR = 1.25), homelessness (AOR = 1.23), age (AOR = 0.96 per year) and participation in sex work (AOR = 0.67) (all p < 0.05). The subanalyses indicated that dealing drugs other than cannabis, cannabis use, and non-custodial involvement in the criminal justice system were the only factors significantly associated with selling cannabis in all four subgroups.

conclusionThese findings support existing evidence indicating that selling illicit cannabis is often a survival-driven strategy to support the basic needs and substance use of some PWUD. Our findings suggest jurisdictions with planned or impending cannabis legalization and regulation should consider the vulnerability of PWUD when seeking to eradicate illicit cannabis markets, for example, in setting criminal penalties for selling cannabis outside of regulatory frameworks.

Indexed as

AdultAgedCanadaCannabisCohort StudiesDrug TraffickingDrug UsersFemaleHumansIllicit DrugsMaleMiddle AgedPrevalenceProspective StudiesSocioeconomic FactorsIllicit DrugsCannabisDealingIllicit drug useProspective cohort studySubstance use

Identifiers

PMID31015080
PMCPMC7039539

What OpenQuestion holds

Textmetadata
LicenceTDM
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.