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Trends in hepatitis C virus infection among patients in the HIV Outpatient Study, 1996-2007
Philip R Spradling1, James T Richardson, Kate Buchacz
1Division of Viral Hepatitis, National Center for HIV, Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Mailstop G37, 1600 Clifton Road, NE, Atlanta, GA 30333, USA. pspradling@cdc.gov
Insights
Hepatitis C virus (HCV) screening improved in HIV patients, with prevalence decreasing overall. However, injection drug users (IDUs) saw no decline, highlighting ongoing challenges in HCV coinfection management.
Area of Science:
- Infectious Diseases
- Hepatology
- Public Health
Background:
- Hepatitis C virus (HCV) coinfection significantly increases morbidity and mortality in individuals with human immunodeficiency virus (HIV).
- Understanding screening practices and prevalence trends is crucial for managing HIV/HCV coinfection.
Purpose of the Study:
- To assess trends in HCV infection screening practices among HIV-infected patients.
- To determine changes in HCV infection prevalence within the HIV Outpatient Study (HOPS) cohort between 1996 and 2007.
Main Methods:
- Analysis of patient data from the HOPS cohort (1996-2007).
- Calculation of annual HCV testing eligibility and prevalence rates.
- Logistic regression to identify factors associated with HCV testing.
Main Results:
- HCV testing eligibility increased from 10.7% to 76.6% between 1996 and 2007.
- Overall HCV prevalence decreased from 36.7% to 19.7% during the study period.
- Prevalence declined in most groups, but not among injection drug users (IDUs); IDUs were a primary driver of prevalent infections.
Conclusions:
- HCV screening in the HOPS cohort demonstrated significant improvement.
- Despite improved screening, a substantial portion of patients remained untested for HCV.
- The decline in HCV prevalence was largely attributed to factors other than injection drug use.
Background:
Coinfection with hepatitis C virus (HCV) contributes increasingly to the morbidity and mortality of persons infected with HIV. We assessed HCV infection screening practices and determined trends in the prevalence of HCV infection in the HIV Outpatient Study (HOPS) from 1996 to 2007.
Methods:
We calculated the proportion of patients eligible to be tested for HCV infection (i.e., never tested or previously tested negative) and the prevalence of HCV infection annually from 1996 to 2007 by sociodemographic, clinical, and HIV risk category characteristics. We used multiple logistic regression analyses to evaluate factors independently associated with HCV testing.
Results:
A total of 7618 patients were active in the HOPS from 1996 through 2007. The proportion of eligible patients tested for HCV infection increased from 10.7% in 1996 to 76.6% in 2007 and increased among all demographic and risk groups. Overall HCV prevalence decreased from 36.7% in 1996 to 19.7% in 2007; decreases in prevalence occurred among all groups except for injection drug users (IDUs). In multivariable analysis, age older than 35 years, nonwhite race, Hispanic ethnicity, high-risk heterosexual and IDU risk categories, and at least 3 years of enrollment in the HOPS were associated with increased odds of having been tested for HCV infection.
Conclusions:
Screening for HCV infection in the HOPS has improved, although a sizable fraction of patients remain unscreened. The decline in overall HCV infection prevalence from 1996 to 2007 resulted primarily from a decline in the fraction of all prevalent infections in the cohort attributable to IDU patients.
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