Estimating the size of the population of persons who inject drugs in the island of Montéal, Canada, using a six-source capture-recapture model

aut.relation.journalDrug and Alcohol Dependenceen_NZ
aut.researcherVandal, Alain
dc.contributor.authorLeclerc, Pen_NZ
dc.contributor.authorVandal, ACen_NZ
dc.contributor.authorFall, Aen_NZ
dc.contributor.authorBruneau, Jen_NZ
dc.contributor.authorRoy, Éen_NZ
dc.contributor.authorBrissette, Sen_NZ
dc.contributor.authorArchibald, Cen_NZ
dc.contributor.authorArruda, Nen_NZ
dc.contributor.authorMorissette, Cen_NZ
dc.description.abstractBackground To plan and implement services to persons who inject drugs (PWID), knowing their number is essential. For the island of Montréal, Canada, the only estimate, of 11,700 PWID, was obtained in 1996 through a capture-recapture method. Thirteen years later, this study was undertaken to produce a new estimate. Methods PWID were defined as individuals aged 14-65 years, having injected recently and living on the island of Montréal. The study period was 07/01/2009 to 06/30/2010. An estimate was produced using a six-source capture-recapture log-linear regression method. The data sources were two epidemiological studies and four drug dependence treatment centres. Model selection was conducted in two steps, the first focusing on interactions between sources and the second, on age group and gender as covariates and as modulators of interactions. Results A total of 1,480 PWID were identified in the six capture sources. They corresponded to 1,132 different individuals. Based on the best-fitting model, which included age group and sex as covariates and six two-source interactions (some modulated by age), the estimated population was 3,910 PWID (95% confidence intervals (CI): 3 180-4 900) which represents a prevalence of 2.8 (95% CI: 2.3-3.5) PWID per 1000 persons aged 14-65 years. Conclusions The 2009-2010 estimate represents a two-thirds reduction compared to the one for 1996. The multisource capture-recapture method is useful to produce estimates of the size of the PWID population. It is of particular interest when conducted at regular intervals thus allowing for close monitoring of the injection phenomenon.en_NZ
dc.identifier.citationDrug and alcohol dependence, 142, 174-180.
dc.rightsCopyright © 2014 Elsevier Ltd. All rights reserved. This is the author’s version of a work that was accepted for publication in (see Citation). Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. The definitive version was published in (see Citation). The original publication is available at (see Publisher's Version).
dc.subjectInjection drug useen_NZ
dc.subjectLog-linear modelen_NZ
dc.titleEstimating the size of the population of persons who inject drugs in the island of Montéal, Canada, using a six-source capture-recapture modelen_NZ
dc.typeJournal Article
pubs.organisational-data/AUT/Health & Environmental Science
pubs.organisational-data/AUT/Health & Environmental Science/Public Health & Psych Studies
pubs.organisational-data/AUT/PBRF/PBRF Health and Environmental Sciences
pubs.organisational-data/AUT/PBRF/PBRF Health and Environmental Sciences/HY Public Health & Psychosocial Studies 2018 PBRF
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Leclerc et al - DAD2014-Estimating the size of the population of persons who inject drugs in the island of Montréal, Canada, using a 6-source capture-recapture model.pdf
452.26 KB
Adobe Portable Document Format
Journal article
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
AUT Grant of Licence for Scholarly Commons Feb2017.pdf
239.25 KB
Adobe Portable Document Format