a) STAN study: relationship between ASUI scores (higher levels indicate fewer symptoms) and 8-isoprostane levels, (Multivariate regression including BMI and race, N=102, Adj R2=0.12, p=0.09). b) STAN study: relationship between ACT scores (higher levels indicate better control) and 8-isoprostane, (Multivariate regression including BMI and race, N=102, Adj R2=0.12, p=0.08). c) EBAD study: relationship between 8-isoprostanes and ACQ scores (lower scores indicate better control) (Simple linear regression, N=15, r2=0.37, p=0.006).