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: [which may or may not be in the standard table to calculate your answers – beware!].

	Number of individuals	Incidence of Lung cancer deaths
Smokers	24,500	15
Non-smokers	10,500	2

1.         Calculate the RR of smoking and lung cancer death. Interpret your results in a sentence.                           
2.         Calculate the population risk difference
3.         Interpret the population risk difference in a sentence.
4.         Calculate the population etiologic fraction for smoking and lung cancer based on      these data
5.        Interpret the results of the Population etiologic fraction in a sentence.

Answer 1

ANSWER:- Given data, No. of individuals Incidence of lung cancer deaths Smokers 24,500 15 Non-smoker's 10, 500 ③ we have to estimate disk ratio, Relative risk - Risk ratio = (topood 100000 7.5 Relative ai sk. 7.5 > @ Now we have to find risk differences colove AR = 1 Of Smokers- 104 non Smokers. a zeleniny - 10:00 -0.000619 -0.0001904 10.00042 fence we determined the values.