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Epidemiology Chapter 9 Questions and Correct Answers/ Latest Update / Already Graded

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The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among smokers. The death rate per 100,000 for coronary thrombosis is 422 among non-smokers and 599 among smokers. The prevalence of smoking in the population is 55%. The relative risk of dying for a smoker compared to a non-smoker is: [Refer to the chapter titled "Study Designs: Cohort Studies"] Ans: 10.1 for lung cancer and 1.4 for coronary thrombosis True or False? The term attributable risk is also known as the rate difference or risk difference. Ans: True The population etiologic fraction is a measure of the proportion of the disease rate in a population attributable to the exposure of interest. This measure of effect is influenced by Ans: The relative risk of the disease in exposed individuals versus unexposed individuals. The prevalence of the exposure in the population All rights reserved © 2025/ 2026 | Page | 2 (A and C) The population etiologic fraction for a particular disease from Factor X alone is five times greater than that from Factor Y alone. If the relative risk associated with Factor X is 2, and with Factor Y is 20, which of the following statements is true? Ans: Fewer persons are exposed to Factor Y than to Factor X Refer to the 2 by 2 table below

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Epidemiology Chapter 9 Questions and
Correct Answers/ Latest Update / Already
Graded
The death rate per 100,000 for lung cancer is 7 among non-smokers
and 71 among smokers. The death rate per 100,000 for coronary
thrombosis is 422 among non-smokers and 599 among smokers. The
prevalence of smoking in the population is 55%.



The relative risk of dying for a smoker compared to a non-smoker is:
[Refer to the chapter titled "Study Designs: Cohort Studies"]

Ans: 10.1 for lung cancer and 1.4 for coronary thrombosis


True or False? The term attributable risk is also known as the rate
difference or risk difference.

Ans: True


The population etiologic fraction is a measure of the proportion of the
disease rate in a population attributable to the exposure of interest.
This measure of effect is influenced by

Ans: The relative risk of the disease in exposed individuals
versus unexposed individuals.
The prevalence of the exposure in the population

All rights reserved © 2025/ 2026 |

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