A statement quoted in this chapter was, “Use of aspirin for five years or longer was tied to a 30-percent reduction in skin cancer risk [for women aged 50 to 79], according to findings published in the journal Cancer” (Pittman, 14 March 2013).
a. What term from this chapter applies to the phrase “30 percent reduction in skin cancer risk?”
b. Based on the information that there was a 30% reduction in skin cancer risk when using aspirin compared to not using aspirin, find the relative risk of skin cancer when using aspirin compared to not using aspirin.
c. Is it possible to calculate the baseline risk of skin cancer from the information provided in the quote? If so, calculate it. If not, briefly explain why not.