Question 6 / 8: 

The following information is for Questions 6?-7

The 1 year risk (i.e. annual incidence) of lung cancer in smokers is 140 per 100,000.

The 1 year risk of lung cancer in non?-smokers of the general population is 10 per 100,000.

Smoking in bars was banned, in part, because of epidemiologic evidence of ill?-effects of second hand smoke on food service workers. non?-smoking food service workers have a 50% higher risk of lung cancer than non?-smokers of the general population.

What is the estimated annual incidence rate of lung cancer in non?-smoking food service workers?
Answer: 
If the incidence rate of lung cancer in non?-smokers is 10 per 100,000 at risk per

year, and food service workers have a 50% higher rate than this, then food service

workers have an annual rate of lung cancer of 15 per 100,000 at risk.

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Epidemiology & Biostatistics Cohort Studies

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Attribution:  Janet, E.A. Forrester, Kwan Ho Kenneth Chui, Steven Cohen, Michael D. Kneeland, Alice Tang, David Tybor. Epidemiology and Biostatistics 2010. (Tufts University OpenCourseWare), http://ocw.tufts.edu/Course/65/ (Accessed 3 May, 2014). License: Creative Commons BY-NC-SA
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