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Table 2 Estimated odds ratios for asthma claims using binary response conditional logistic regression models.

From: Asthma exacerbation and proximity of residence to major roads: a population-based matched case-control study among the pediatric Medicaid population in Detroit, Michigan

Model Covariate Term OR1 95% CI2 P-value
1 Primary Road Primary 0.971 0.944 0.999 0.04
2 Secondary Road Secondary 0.995 0.966 1.025 0.74
3 Primary Road + Secondary Road Primary 0.970 0.944 0.998 0.04
   Secondary 0.992 0.963 1.022 0.59
4 RFRS3(Primary Road) Primary 1.059 0.736 1.525 0.75
5 RFRS(Secondary Road) Secondary 0.983 0.739 1.309 0.90
6 RFRS(Primary Road) +RFRS(Secondary Road) Primary 1.060 0.736 1.526 0.76
   Secondary 0.983 0.738 1.308 0.90
  1. 1 OR: Odds ratio
  2. 2 CI: Confidence interval
  3. 3 RFRS: Reduced form response surface transformation
  4. Estimated odds ratios for experiencing an asthma claim with a 1,000 m increase in distance from main roads or with a 1-unit increase of RFRS transformed distance, using binary response (cases versus controls with cases defined by any asthma claims recorded in 2004-2006) conditional logistic regression models.