Biostatistics Quiz 5 (Epidemiology
Chapters 11 & 12) Questions and 100%
Correct Answers 2024
The most likely explanation for the differences in rates of ASHD between the initial
examination and the yearly follow-up examinations in men is --------- Correct Answer
--------- The initial examination measures the prevalence of ASHD, whereas the
subsequent examinations primarily measure the incidence of ASHD
Several studies have found that approximately 85% of cases of lung cancer are due to
cigarette smoking. This measure is an example of: --------- Correct Answer --------- An
attributable risk
The results of a 10-year cohort study of smoking and coronary heart disease (CHD) are
shown below: The incidence of CHD in smokers that can be attributed to smoking is:
--------- Correct Answer --------- 27.5 per 1000
The results of a 10-year cohort study of smoking and coronary heart disease (CHD) are
shown below: The proportion of the total incidence of CHD in smokers that is
attributable to smoking is: --------- Correct Answer --------- 84.6%
In a cohort study of smoking and lung cancer, the incidence of lung cancer among
smokers was found to be 9/1,000 and the incidence among nonsmokers was 1/1,000.
From another source we know that 45% of the total populations were smokers. The
incidence of lung cancer attributable to smoking in the total population is: ---------
Correct Answer --------- 3.6 per 1000
In a cohort study of smoking and lung cancer, the incidence of lung cancer among
smokers was found to be 9/1,000 and the incidence among nonsmokers was 1/1,000.
From another source we know that 45% of the total populations were smokers. The
proportion of the risk in the total population that is attributable to smoking is: ---------
Correct Answer --------- 78.26%
Relative Risk --------- Correct Answer --------- "What is the ratio of the risk of disease in
exposed individuals to the risk of disease in non-exposed individuals?" It is not
expressed in negative numbers.
If Relative Risk = 1 --------- Correct Answer --------- no association
If Relative Risk > 1 --------- Correct Answer --------- positive association; possibly causal