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IID-27 Data Details

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IID-27 Increase the proportion of persons aware they have a hepatitis C infection

About the Data

Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.

Data Source: 
National Health and Nutrition Examination Survey (NHANES); Centers for Disease Control and Prevention, National Center for Health Statistics (CDC/NCHS)
Changed Since the Healthy People 2020 Launch: 
Yes
Measure: 
percent
Baseline (Year): 
53.0 (2003–08)
Target: 
60.0
Target-Setting Method: 
Projection/trend analysis
Target-Setting Method Justification: 
An 11 percent increase in the percentage of persons aware they have a chronic hepatitis C virus infection is projected. Although the number of new cases of hepatitis C has declined, a substantial burden of disease persists as a result of chronic hepatitis C infections. Approximately 3.2 million persons in the United States are infected with HCV. The peak prevalence occurred among person aged 40 to 49 years, the majority of whom likely became infected in the 1970s and 1980s when incidence was highest. The epidemiologic profile of chronic viral hepatitis C has implications for the demand for screening and treatment over the next decade. Screening is an essential component to chronic hepatitis C care because nearly half of persons with a chronic form of hepatitis C are unaware of their infection. A slightly more ambitious target is set to recognize the increased benefits of screening as highly effective HCV therapies are licensed in the next decade.
Numerator: 

Number of persons who tested positive for hepatitis C and who indicated they were aware they had hepatitis C prior to the NHANES laboratory testing

Denominator: 

Number of persons who tested positive for hepatitis C

Comparable Healthy People 2010 Objective: 
Not applicable
Questions Used to Obtain the National Baseline Data: 

    From the 2003-04 National Health and Nutrition Examination Survey:

    [NUMERATOR:]

    Was the test result in our letter [report of findings (ROF) letter informing participants of their positive hepatitis C test result] the first time you were told (you had/SP has) hepatitis C?

    1. Yes
    2. No
    3. Refused
    4. Don't know
Data Collection Frequency: 
Periodic
Methodology Notes: 

    Due to the small sample size, pooling data over multiple years is necessary to produce stable estimates.

Caveats and Limitations: 
Reported percentage is merely the percent of respondents to the NHANES Hepatitis C Follow-Up Survey reporting prior knowledge of their HCV status, not a population estimate. Standard errors and CIs are not applicable in this situation due to the low response rate and small number of respondents to the Hepatitis C Follow-Up Survey.

Revision History

Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.

Description of Changes Since the Healthy People 2020 Launch: 
In 2015, the baseline was revised from 49.0 percent (2002-07) to 53.0 percent (2003-08) to correct a programming error. The target and target-setting method were not revised.

References

Additional resources about the objective

  1. Volk M, Tocco R, Saini S, Lok A. Public health impact of antiviral therapy for hepatitis C in the United States. Hepatology. 2009;50:1750-55.