Incidence and Risk Factors for Hepatitis C Virus Infection among Illicit Drug Users in Italy

So far, only three small outdated studies have investigated hepatitis C virus (HCV) incidence and risk factors among illicit drug users (DUs) in Italy. Thus, during 2007–2010, we conducted a prospective cohort study among DUs attending 17 Italian rehabilitation centers serving urban areas. Two hundr...

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Veröffentlicht in:Journal of urban health 2018-02, Vol.95 (1), p.99-110
Hauptverfasser: Spada, Enea, Rezza, Giovanni, Garbuglia, Anna Rosa, Lombardo, Flavia Lucia, Zuccaro, Ornella, Menniti Ippolito, Francesca, Cupellaro, Elisabetta, Capone, Stefania, Capobianchi, Maria Rosaria, Nicosia, Alfredo, Cortese, Riccardo, Folgori, Antonella, Mele, Alfonso
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container_end_page 110
container_issue 1
container_start_page 99
container_title Journal of urban health
container_volume 95
creator Spada, Enea
Rezza, Giovanni
Garbuglia, Anna Rosa
Lombardo, Flavia Lucia
Zuccaro, Ornella
Menniti Ippolito, Francesca
Cupellaro, Elisabetta
Capone, Stefania
Capobianchi, Maria Rosaria
Nicosia, Alfredo
Cortese, Riccardo
Folgori, Antonella
Mele, Alfonso
description So far, only three small outdated studies have investigated hepatitis C virus (HCV) incidence and risk factors among illicit drug users (DUs) in Italy. Thus, during 2007–2010, we conducted a prospective cohort study among DUs attending 17 Italian rehabilitation centers serving urban areas. Two hundred eighty-four HCV-uninfected DUs were prospectively followed by interview and anti-HCV antibody and RNA testing every 6 months. Incidence was calculated using the person-years method. Infection predictors were assessed by time-dependent Cox analysis. Participants were mostly male (83.4%), under opioid substitution therapy (OST) (78.9%), non-injecting DUs (67.9%), and with a mean age of 30.8. Ninety-one of 224 DUs initially under OST interrupted treatment during the follow-up. Overall HCV incidence was 5.83/100 person-years at risk (PYAR) [95% confidence intervals (CI), 3.63–9.38]. The incidence did not significantly differ according the participants’ sociodemographic characteristics or the degree of urbanization of the towns involved in the study. The incidence was higher for DUs under than for those not under OST (6.23 vs 4.50/100 PYAR; p  = 0.681). Incidence was also higher for those with than for those without OST interruption (7.17 vs 5.04/100 PYAR; p  = 0.55). However, all these differences were non-significant. At last follow-up visit, a significant decrease in frequency of sharing equipment for preparation/using drugs (by injection or not) was observed by analyzing either the whole cohort or DUs under OST only. Anti-HCV seroconversion resulted independently associated with sharing drug preparation/use equipment, backloading, having a HCV-positive sexual partner, or household and (marginally) intravenous injection. In this study, HCV incidence was non-negligible and OST seemed to lack effectiveness in reducing it. In Italy, implementation of combined harm reduction interventions and antiviral treatment of chronically infected DUs would be needed.
doi_str_mv 10.1007/s11524-017-0207-5
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Thus, during 2007–2010, we conducted a prospective cohort study among DUs attending 17 Italian rehabilitation centers serving urban areas. Two hundred eighty-four HCV-uninfected DUs were prospectively followed by interview and anti-HCV antibody and RNA testing every 6 months. Incidence was calculated using the person-years method. Infection predictors were assessed by time-dependent Cox analysis. Participants were mostly male (83.4%), under opioid substitution therapy (OST) (78.9%), non-injecting DUs (67.9%), and with a mean age of 30.8. Ninety-one of 224 DUs initially under OST interrupted treatment during the follow-up. Overall HCV incidence was 5.83/100 person-years at risk (PYAR) [95% confidence intervals (CI), 3.63–9.38]. The incidence did not significantly differ according the participants’ sociodemographic characteristics or the degree of urbanization of the towns involved in the study. The incidence was higher for DUs under than for those not under OST (6.23 vs 4.50/100 PYAR; p  = 0.681). Incidence was also higher for those with than for those without OST interruption (7.17 vs 5.04/100 PYAR; p  = 0.55). However, all these differences were non-significant. At last follow-up visit, a significant decrease in frequency of sharing equipment for preparation/using drugs (by injection or not) was observed by analyzing either the whole cohort or DUs under OST only. Anti-HCV seroconversion resulted independently associated with sharing drug preparation/use equipment, backloading, having a HCV-positive sexual partner, or household and (marginally) intravenous injection. In this study, HCV incidence was non-negligible and OST seemed to lack effectiveness in reducing it. In Italy, implementation of combined harm reduction interventions and antiviral treatment of chronically infected DUs would be needed.</description><identifier>ISSN: 1099-3460</identifier><identifier>EISSN: 1468-2869</identifier><identifier>DOI: 10.1007/s11524-017-0207-5</identifier><identifier>PMID: 29204843</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Antiviral agents ; Confidence intervals ; Drug abuse ; Epidemiology ; Health Informatics ; Hepatitis ; Hepatitis C ; Incidence ; Injection ; Intravenous administration ; Medicine ; Medicine &amp; Public Health ; Opioids ; Public Health ; Ribonucleic acid ; Risk analysis ; Risk factors ; RNA ; Seroconversion ; Urban areas ; Urbanization ; Viruses</subject><ispartof>Journal of urban health, 2018-02, Vol.95 (1), p.99-110</ispartof><rights>The New York Academy of Medicine 2017</rights><rights>Journal of Urban Health is a copyright of Springer, (2017). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c470t-2716c4a4a1ab4503445ffc63645b328e80bb4ca6e89b340ba0cade2e4168659f3</citedby><cites>FETCH-LOGICAL-c470t-2716c4a4a1ab4503445ffc63645b328e80bb4ca6e89b340ba0cade2e4168659f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11524-017-0207-5$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11524-017-0207-5$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>230,315,781,785,886,27929,27930,41493,42562,51324</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29204843$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Spada, Enea</creatorcontrib><creatorcontrib>Rezza, Giovanni</creatorcontrib><creatorcontrib>Garbuglia, Anna Rosa</creatorcontrib><creatorcontrib>Lombardo, Flavia Lucia</creatorcontrib><creatorcontrib>Zuccaro, Ornella</creatorcontrib><creatorcontrib>Menniti Ippolito, Francesca</creatorcontrib><creatorcontrib>Cupellaro, Elisabetta</creatorcontrib><creatorcontrib>Capone, Stefania</creatorcontrib><creatorcontrib>Capobianchi, Maria Rosaria</creatorcontrib><creatorcontrib>Nicosia, Alfredo</creatorcontrib><creatorcontrib>Cortese, Riccardo</creatorcontrib><creatorcontrib>Folgori, Antonella</creatorcontrib><creatorcontrib>Mele, Alfonso</creatorcontrib><creatorcontrib>Collaborative Study Group</creatorcontrib><creatorcontrib>The Collaborative Study Group</creatorcontrib><title>Incidence and Risk Factors for Hepatitis C Virus Infection among Illicit Drug Users in Italy</title><title>Journal of urban health</title><addtitle>J Urban Health</addtitle><addtitle>J Urban Health</addtitle><description>So far, only three small outdated studies have investigated hepatitis C virus (HCV) incidence and risk factors among illicit drug users (DUs) in Italy. 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The incidence was higher for DUs under than for those not under OST (6.23 vs 4.50/100 PYAR; p  = 0.681). Incidence was also higher for those with than for those without OST interruption (7.17 vs 5.04/100 PYAR; p  = 0.55). However, all these differences were non-significant. At last follow-up visit, a significant decrease in frequency of sharing equipment for preparation/using drugs (by injection or not) was observed by analyzing either the whole cohort or DUs under OST only. Anti-HCV seroconversion resulted independently associated with sharing drug preparation/use equipment, backloading, having a HCV-positive sexual partner, or household and (marginally) intravenous injection. In this study, HCV incidence was non-negligible and OST seemed to lack effectiveness in reducing it. 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subjects Antiviral agents
Confidence intervals
Drug abuse
Epidemiology
Health Informatics
Hepatitis
Hepatitis C
Incidence
Injection
Intravenous administration
Medicine
Medicine & Public Health
Opioids
Public Health
Ribonucleic acid
Risk analysis
Risk factors
RNA
Seroconversion
Urban areas
Urbanization
Viruses
title Incidence and Risk Factors for Hepatitis C Virus Infection among Illicit Drug Users in Italy
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