Epidemiology for Public Health Practice 5th Edition by Robert Friis,Thomas Sellers

Exercise 2

The impact of an exposure on a population does not depend upon:
a. the strength of the association between exposure and disease.
b. the prevalence of the exposure.
c. the case fatality rate.
d. the overall incidence rate of disease in the population.
The next seven questions (3-9) are based on the following data: The death rate per 100,000 for lung cancer is 7 among nonsmokers and 71 among smokers. The death rate per 100,000 for coronary thrombosis is 422 among nonsmokers and 599 among smokers. The prevalence of smoking in the population is 55%. (If necessary, refer to the chapter on cohort studies for formulas for RR.)