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 Number of Individuals Lung Cancer Deaths Smokers 24,500 15 Nonsmokers 10,500 2 Calculate the population risk difference per 100,000 per year Round to the tenth decimal Calculate the risk difference per 100,000 per year Round to the tenth decimal

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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

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:

	Number of Individuals	Lung Cancer Deaths
Smokers	24,500	15
Nonsmokers	10,500	2

Calculate thepopulation risk difference per 100,000 per year. Round to the tenth decimal.

Calculate the risk difference per 100,000 per year. Round to the tenth decimal.

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