Association and Errors in Epidemiology



Asthma is a chronic lung disease caused by inflammation of the lower airways and episodes of airflow obstruction. Asthma episodes or attacks can vary from mild to life-threatening. In 2007, about
7% percent of the U.S. population was diagnosed with asthma and there have been a growing number of new cases since that time. There are several known risk factors identified as triggers of asthma
symptoms and episodes, including inhalation of allergens or pollutants, infection, cold air, vigorous exercise, and emotional upsets. There is also growing evidence relating body-mass index to
asthma in both children and adults. Design a study to investigate whether there is such an association.Choose a study design and justify the reasons you chose the design over others.Select a statistical measure you would use to describe the association (if there is one) between body mass index and asthma.In addition, address:1. Subject selection2. Issues relating to the measurement of both the exposure and the outcome3. Potential biases that the study might be prone to, and how they might be handled4. Possible confounding factors and effect modifiers and how to overcome their effectPresent the information in a 750-1000-word report, using section headings where each requirement is described and justified under each of the following headings: Study Design, Statistical Measures,