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

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

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 OR: Odds ratio
² CI: Confidence interval
³ RFRS: Reduced form response surface transformation
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.

ISSN: 1476-069X