Case 1: Washington DC
Prevalence Rate = (Cases of Hepatitis C/Population) X 100
                        Â
= (105800/5143186) X 100 = 2.06 (given as 2.30)
Case 2: OR
Prevalence Rate = (Cases of Hepatitis C/Population) X 100
                        Â
= (79800/2964621) X100 = 2.69 (given as 3.05)
Even though Washington State has more cases of Hepatitis C
(105800) compared to OR (79800), the reported prevalence rate in OR
in higher (3.05) than Washington (2.30).
REASON: Population of OR is 2964621 is less than Population of
Washington (5143186). This makes the Cases of Hepatitis C per 100
population (which gives the prevalence rate) more for OR than
Washington.
