Question: In a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. All lung cancer deaths were ascertained and the following data were available:


Fifteen (15) lung cancer deaths occurred among 24,500 smokers

Two (2) lung cancer deaths occurred among 10,500 non-smokers


Calculate the following and interpret your results in each case.

A. Calculate the proper measure of association of smoking and lung cancer.

B. Calculate the population risk difference.

C. Calculate the population attributable risk for smoking and lung cancer.