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A prevalence survey conducted from January 1 through December 31, 2014 identified 3000 cases of leukemia...

A prevalence survey conducted from January 1 through December 31, 2014 identified 3000 cases of leukemia in a city of 2 million persons. The incidence rate of leukemia in this population is 6/10,000 persons each year.

What percent of the 3000 cases were newly diagnosed in 2014?

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Answer #1

A prevalence survey conducted from January 1 through December 31, 2014, identified 3000 cases of leukemia in a city of 2 million persons.

The incidence rate was 6 cases per 10,000 persons.

Incidence means newly diagnosed cases in a specific period

So, the total incidence rate from January 1 through December 31, 2014, was 1200 cases (According to 6 cases per 10,000 persons)

%

Answer - 40% of the 3000 cases were newly diagnosed in 2014

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