In a population-based cohort study, an entire community was interviewed regardin
ID: 3149790 • Letter: I
Question
In a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. Upon ascertainment of all lung cancer deaths, the investigator obtained the following data:
4) Calculate the proper measure of association of smoking and lung cancer death. Interpret your results.
5) Calculate the population risk difference. Interpret your results. ( 4 points)
6) Calculate the population etiologic fraction for smoking and lung cancer based on these data. Interpret your results. ( 4 points)
# of individuals lung cancer deaths smokers 24,500 15 non-smokers 10,500 2Explanation / Answer
4) Calculate the proper measure of association of smoking and lung cancer death
P = 15 / 35017 = 0.0004
5)
Population risk difference = 24500 -10500 / 35017 = 0.3998
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