In a hypothetical study, the investigator wants to look at the association between exposure to pesticides in the workplace and the development of asthma. The investigator selects a large group of individuals who work on PLTW farms across the country and follow them over ten years to determine who develops asthma. Of the 318 individuals exposed to pesticides, 69 develop asthma. 990 individuals worked in areas that were free of exposure to pesticides. 903 are asthma-free after ten years. a. Is the hypothetical study a prospective or retrospective cohort study? Explain your answer.
b. Create the corresponding data table to show the results of this study.
c. Calculate the appropriate measure of association for this data. Show your work.
d. Interpret your results. What does this measure of association tell you about the development of disease?