Abstract
Injection drug users (IDUs) are at risk for infection with hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV). Information on time trends in prevalence of these viruses among IDUs and in behaviors influencing their transmission can help define the status of these epidemics and of public health efforts to control them. We conducted a secondary data analysis combining cross-sectional data from IDUs aged 18–30 years enrolled in four Seattle-area studies from 1994 to 2004. Participants in all four studies were tested for antibody to HIV (anti-HIV), hepatitis B core antigen (anti-HBc), and HCV (anti-HCV), and completed behavioral risk assessments. Logistic regression was used to investigate trends in prevalence over time after controlling for sociodemographic, drug use, and sexual behavior variables. Between 1994 and 2004, anti-HBc prevalence declined from 43 to 15% (p < 0.001), anti-HCV prevalence fell from 68 to 32% (p < 0.001) and anti-HIV prevalence remained constant at 2–3%. Declines in anti-HBc and anti-HCV prevalence were observed within the individual studies, although not all these declines were statistically significant. The declines in anti-HBc and anti-HCV prevalence remained significant after control for confounding. Although we did not observe coincident declines in injection equipment sharing practices, there were increases in self-reported needle-exchange use, condom use, and hepatitis B vaccination. We conclude that there has been a substantial and sustained reduction in prevalence rates for HBV and HCV infection among young Seattle IDUs, while HIV rates have remained low and stable.
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Acknowledgements
The funding for this work came from the following sources: RAVEN—National Institute on Drug Abuse (1RO1DA08023), Centers for Disease Control and Prevention (U62/CCU006260); RAVEN II—National Institute on Drug Abuse (DA08023, DA 11447 & DA15026); Kiwi—Centers for Disease Control and Prevention (U62/CCU006260); DUIT/CIDUS III—funding was through a cooperative agreement with the Centers for Disease Control and Prevention.
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The findings and conclusion in this report are those of the authors and do not necessarily reflect the views of the Centers for Disease Control and Prevention.
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Burt and Thiede are with Public Health—Seattle and King County, Seattle, WA, USA; Hagan is with the National Development and Research Institutes, New York, NY, USA; Garfein and Sabin were with the Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA; Garfein is currently with the School of Medicine, University of California at San Diego, San Diego, CA, USA; Sabin is currently with the Global AIDS Program, CDC, Atlanta, GA, USA; Weinbaum is with the Division of Viral Hepatitis, Centers for Disease Control and Prevention, Atlanta, GA, USA.
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Burt, R.D., Hagan, H., Garfein, R.S. et al. Trends in Hepatitis B Virus, Hepatitis C Virus, and Human Immunodeficiency Virus Prevalence, Risk Behaviors, and Preventive Measures among Seattle Injection Drug Users Aged 18–30 Years, 1994–2004. J Urban Health 84, 436–454 (2007). https://doi.org/10.1007/s11524-007-9178-2
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DOI: https://doi.org/10.1007/s11524-007-9178-2