Figure 3From: Asthma exacerbation and proximity of residence to major roads: a population-based matched case-control study among the pediatric Medicaid population in Detroit, Michigan Estimated natural spline terms of distance and RFRS transformed distance showing the distance-odds relationships. * RFRS: Reduced form response surface. Estimated natural spline terms of distance and RFRS transformed distance showing the distance-odds relationships for having an asthma claim, using binary response conditional logistic regression models. The solid lines show the point estimates; the dashed lines show the 95% confidence regions.Back to article page