An Epidemiologist Wants to Conduct a Study on Hepatitis C

An epidemiologist wants to conduct a study on hepatitis C (HCV) transmission in a country with limited healthcare resources.  She has access to a cohort of adults newly diagnosed with HCV and a cohort of age-matched HCV-negative adults.  She plans to use these 2 cohorts of adults to conduct a case-control study.  Which of the following would be the most appropriate measure of interest for this researcher's study?

A) The average death rate in each cohort
B) The frequency of past blood transfusions in each cohort
C) The incidence rate of liver cancer in HCV-positive participants
D) The rate of eventual HCV infection in HCV-negative participants
E) The rate of treatment-related adverse effects in HCV-positive participants

Correct Answer:

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