Evidence map›Paper›PMID 34237582›Full record

ArticleDrug and alcohol dependence2021

The impact of recent homelessness on the provision of injection drug use initiation assistance among persons who inject drugs in Tijuana, Mexico and Vancouver, Canada.

Charles Marks, Zachary Bouck, Sonia Jain, Xiaoying Sun, Steffanie A Strathdee, Peter Vickerman, Kora DeBeck, M-J Milloy, Kanna Hayashi, Dan Werb

Open access · greenAbstract read
In one paragraph

Article in Drug and alcohol dependence, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
1.2field-weighted citation impact, top 18% 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

4 citing papers in PubMed, 4 citations in OpenAlex.

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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

10 authors at 7 institutions in 3 countries.

Charles MarksJoint Doctoral Program in Interdisciplinary Research on Substance Use, San Diego State University and University of California, San Diego, United States.
Zachary BouckCentre on Drug Policy Evaluation, St. Michael's Hospital, Unity Health Toronto, Toronto, Canada; Division of Epidemiology, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada.
Sonia JainBiostatistics Research Center, Department of Family Medicine and Public Health, University of California San Diego, San Diego, United States.
Xiaoying SunBiostatistics Research Center, Department of Family Medicine and Public Health, University of California San Diego, San Diego, United States.
Steffanie A StrathdeeDivision of Infectious Diseases & Global Public Health, University of California, San Diego, United States.
Peter VickermanPopulation Health Sciences, University of Bristol, Bristol, UK.
Kora DeBeckSchool of Public Policy, Simon Fraser University, Vancouver, Canada; British Columbia Centre on Substance Use, Vancouver, Canada.
M-J MilloyBritish Columbia Centre on Substance Use, Vancouver, Canada; Department of Medicine, University of British Columbia, Vancouver, Canada.
Kanna HayashiBritish Columbia Centre on Substance Use, Vancouver, Canada; Faculty of Health Sciences, Simon Fraser University, Vancouver, Canada.
Dan WerbCentre on Drug Policy Evaluation, St. Michael's Hospital, Unity Health Toronto, Toronto, Canada; Division of Infectious Diseases & Global Public Health, University of California, San Diego, United States; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada. Electronic address: dwerb@health.ucsd.edu.
Simon Fraser University · CASt. Michael's Hospital · CAUniversity of California San Diego · USSan Diego State University · USUniversity of Bristol · GBUniversity of British Columbia · CAUniversity of California System · US

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
Impact of Drug Policy Reform on the HIV Risk Environment among IDUs in TijuanaR37DA019829 · NIDA · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI STRATHDEE, STEFFANIE A. · 2010 to 2019
$6.7M
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
CIHRNIDA NIH HHS DP2 DA040256NIDA NIH HHS R37 DA019829NIDA NIH HHS U01 DA021525NIDA NIH HHS U01 DA038886
6 · The paper itself

Abstract

objectiveTo assess the relationship between experiencing homelessness and assisting injection drug use (IDU) initiation among people who inject drugs (PWID) in Tijuana, Mexico and Vancouver, Canada.

methodsWe used self-reported questionnaire data collected semi-annually on PWID from Tijuana (n = 703) and Vancouver (n = 1551) between 2014 and 2017. Within each setting, the effect of recent (i.e., past six months) homelessness on recent provision of injection initiation assistance (i.e., helping anybody inject for the first time in the past six months) was estimated using inverse-probability-of-treatment (IPT)-weighted estimation of a marginal structural model.

resultsAcross follow-up, the prevalence of recent homelessness at a given visit ranged from 11.6%-16.5% among Tijuana-based participants and 9.4%-18.9% among Vancouver-based participants; the prevalence of recent provision of injection initiation at a given follow-up visit was lower, ranging from 3.3%-5.4% in Tijuana and 2.5%-4.1% in Vancouver. Based on the IPT-weighted estimates, recent homelessness was associated with 66% greater odds among Tijuana-based PWID (Adjusted Odds Ratio [AOR] = 1.66; 95% CI: 1.01-2.73) and 47% greater odds among Vancouver-based PWID (AOR = 1.47, 95% CI: 1.02-2.13) of providing injection initiation assistance over the same six-month period.

conclusionWe found that recently experiencing homelessness was associated with an increased likelihood of PWID reporting IDU initiation assistance over time in both Tijuana and Vancouver. Addressing homelessness may decrease the initiation of IDU via multiple pathways.

Indexed as

Drug UsersIll-Housed PersonsPharmaceutical PreparationsSubstance Abuse, IntravenousCanadaHumansMexicoPharmaceutical PreparationsHomelessnessHousing instabilityInjection drug usePeople who inject drugs

Identifiers

PMID34237582
PMCPMC8827172
OpenAlexW3161587704

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.