Figure 2.

Estimated odds ratios with 95% confidence intervals of asthma for distance thresholds from primary roads. Estimated odds ratios with 95% confidence intervals of asthma for different distance thresholds from primary road, as well as the number of subjects lying in the two level indicator of distance from primary road by the case-control status. Each estimate is based on conditional logistic regression results using distance as a dichotomous factor indicating residence location inside or outside the corresponding buffer, for the population-based matched case-control data set of asthma from the pediatric Medicaid population in Detroit, MI, 2004-2006.