Geographic variations of childhood asthma hospitalization and outpatient visits and proximity to ambient pollution sources at a U.S.-Canada border crossing

Table 2 Spatial analysis of Case-Control Study Showing Odds Ratios

	Odds Ratios		95% Confidence Interval
Sites	0.5 vs 2 km	1 vs 2 km	0.5 vs 2 km	1 vs 2 km
Peace Bridge Complex	0.69*	0.87	0.48,0.99	0.69,1.09
Air release	0.77	0.87	0.58,1.03	0.70,1.09
Toxic release	1.91**	1.23	1.21,3.01	0.88,1.72
Multiple release	0.80*	0.93	0.70,0.92	0.83,1.05
Interstate 190	0.90	0.81*	0.74,1.08	0.69,0.95
Interstate198 and Route 33	0.96	0.95	0.85,1.09	0.85,1.07
Main St, Bailey Ave, Niagara St, and Seneca St	0.92	0.96	0.82,1.02	0.86,1.08
Delaware Ave	0.85	1.01	0.68,1.07	0.83,1.24

Note. Case patients and control patients derived from hospitalization and outpatient visits for asthma (ICD-9 code 493) and gastroenteritis (ICD-9 code 558) from Kaleida Database, 2000–2002
** Positive association between exposure and outcome at the 5% significance level
* Negative association between exposure and outcome at the 5% significance level

ISSN: 1476-072X