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BMC Public Health
Published in: BMC Public Health 1/2017

Open Access 01-12-2017 | Research article

Effectiveness of needle and syringe Programmes in people who inject drugs – An overview of systematic reviews

Authors: Ricardo M Fernandes, Maria Cary, Gonçalo Duarte, Gonçalo Jesus, Joana Alarcão, Carla Torre, Suzete Costa, João Costa, António Vaz Carneiro

Published in: BMC Public Health | Issue 1/2017

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Abstract

Background

Needle and syringe programmes (NSP) are a critical component of harm reduction interventions among people who inject drugs (PWID). Our primary objective was to summarize the evidence on the effectiveness of NSP for PWID in reducing blood-borne infection transmission and injecting risk behaviours (IRB).

Methods

We conducted an overview of systematic reviews that included PWID (excluding prisons and consumption rooms), addressed community-based NSP, and provided estimates of the effect regarding incidence/prevalence of Human Immunodeficiency Virus (HIV), Hepatitis C virus (HCV), Hepatitis B virus (HBV) and bacteremia/sepsis, and/or measures of IRB. Systematic literature searches were undertaken on relevant databases, including EMBASE, MEDLINE, and PsychINFO (up to May 2015). For each review we identified relevant studies and extracted data on methods, and findings, including risk of bias and quality of evidence assessed by review authors. We evaluated the risk of bias of each systematic review using the ROBIS tool. We categorized reviews by reported outcomes and use of meta-analysis; no additional statistical analysis was performed.

Results

We included thirteen systematic reviews with 133 relevant unique studies published between 1989 and 2012. Reported outcomes related to HIV (n = 9), HCV (n = 8) and IRB (n = 6). Methods used varied at all levels of design and conduct, with four reviews performing meta-analysis. Only two reviews were considered to have low risk of bias using the ROBIS tool, and most included studies were evaluated as having low methodological quality by review authors. We found that NSP was effective in reducing HIV transmission and IRB among PWID, while there were mixed results regarding a reduction of HCV infection. Full harm reduction interventions provided at structural level and in multi-component programmes, as well as high level of coverage, were more beneficial.

Conclusions

The heterogeneity and the overall low quality of evidence highlights the need for future community-level studies of adequate design to support these results.

Trial registration

The protocol of this systematic review was registered in Prospective Register of Systematic Reviews (PROSPERO 2015:CRD42015026145).
Appendix
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Metadata
Title
Effectiveness of needle and syringe Programmes in people who inject drugs – An overview of systematic reviews
Authors
Ricardo M Fernandes
Maria Cary
Gonçalo Duarte
Gonçalo Jesus
Joana Alarcão
Carla Torre
Suzete Costa
João Costa
António Vaz Carneiro
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Public Health / Issue 1/2017
Electronic ISSN: 1471-2458
DOI
https://doi.org/10.1186/s12889-017-4210-2

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