Regis NU-713 Advanced Epidemiology and Biostatistics Quiz 5 (Epidemiology Chapters 11 & 12) Questions and 100% Correct Answers

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