Epidemiology Chapter 9 Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: (A and C)
Answer:
Q: 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?
Answer:
Fewer persons are exposed to Factor Y than to Factor X
Q: Refer to the 2 by 2 table below
Answer:
Q: Assuming that the sample table is for a cohort study, define the risk difference or
attributable
Answer:
risk (A/A+B)-(C/C+D)
, Epidemiology Chapter 9 Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: The death rate per 100,000 for lung cancer is 7 among non-smokers and 71
among smokers.
Answer:
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%.
Q: On the basis of the relative risk and etiologic fractions associated with smoking
for lung cancer and coronary thrombosis, which of the following statements is
most likely to be correct?
Answer:
Smoking seems much more likely to be causally related to lung cancer than to
coronary thrombosis.
Solutions | Latest 2026 Update
Q: (A and C)
Answer:
Q: 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?
Answer:
Fewer persons are exposed to Factor Y than to Factor X
Q: Refer to the 2 by 2 table below
Answer:
Q: Assuming that the sample table is for a cohort study, define the risk difference or
attributable
Answer:
risk (A/A+B)-(C/C+D)
, Epidemiology Chapter 9 Questions and Answers with Verified
Solutions | Latest 2026 Update
Q: The death rate per 100,000 for lung cancer is 7 among non-smokers and 71
among smokers.
Answer:
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%.
Q: On the basis of the relative risk and etiologic fractions associated with smoking
for lung cancer and coronary thrombosis, which of the following statements is
most likely to be correct?
Answer:
Smoking seems much more likely to be causally related to lung cancer than to
coronary thrombosis.
