A sample of Cleveland residents was taken to examine the relationship between smoking and COPD (chronic obstructive pulmonary disease). The study found that the prevalence ratio of COPD in non-smokers who live with smokers compared to in non-smokers who do not live with smokers was 2.0. The 95% confidence interval for this prevalence ratio was 1.8 to 2.2. 7. What is the exposure variable (i.e., independent variable)? COPD Smoking Cleveland 8. What is the prevalence ratio of COPD in non-smokers who live with smokers compared to non-smokers who do not live with smokers shown above called (since it comes from a sample of the population in Cleveland)? Parameter Median Interval estimate Point estimate 9. What would the same measure (prevalence ratio of COPD in non-smokers who live with smokers compared to non-smokers who do not live with smokers) be called if it was from the entire population in Cleveland? Parameter Median Interval estimate Point estimate
Added by Mark F.
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Step 1: The exposure variable in the study is smoking, as it is the independent variable being tested. Show more…
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