ABBS (Asthma BMI Baseline Study) is a study being done because men and women who have asthma and a higher body mass index (BMI) do not respond well to usual asthma treatments. At the moment, there are no treatments specifically targeting asthma in patients with a higher BMI. The goal of ABBS is to help researchers plan for future studies that aim to find new treatments for patients who have asthma and higher BMIs. ABBS is sponsored by the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health (NIH) and the American Lung Association. ABBS is closed to enrollment.