For Case Study 3, you will read the case that begins on page 558 "Capstone Case C: Colorectal Cancer Screening." Case C develops the methods of testing for the disease in a population, with a focus on colorectal cancer screening.

You are to answer the following questions only from the case study:

• Question 1

Assume a total US population of 301,351,776; calculate the overall incidence rate per 100,000 of colon cancer in the United States.

• Question 2

By calculating the ratio of incidence rates we can derive the relative risk of getting CRC (males compared to females), or number of times more likely males are to get CRC than females. Calculate the incidence rate for males and females and the relative risk (males versus females).

Question 3

Calculate the incidence of colon cancer for each age category and for males older and younger than age 50 in exhibit c.1.

Question 4

Calculate and interpret the relative risk for males aged 50 and older as compared to males younger than 50.

Question 5

Assume that there are 538,584 males 50 and older alive with CRC, and 31,346 males younger than 50 alive with CRC. What are the prevalence rates (per 100,000) for each age group.