1. Exposure to traffic: Lung function and health status in adults with asthma 
John R. Balmes, MD, Gillian Earnest, MS, Patricia P. Katz, PhD, Edward H. Yelin, PhD, Mark D. Eisner, MD, MPH, Hubert Chen, MD, Laura Trupin, MPH, Fred Lurmann, MS, Paul D. Blanc, MD 
Journal of Allergy and Clinical Immunology 
Volume 123, Issue 3, Pages (March 2009)
DOI: /j.jaci
Copyright © 2009 American Academy of Allergy, Asthma & Immunology Terms and Conditions

2. Fig 1 Scheme of subject eligibility for this substudy.
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2009 American Academy of Allergy, Asthma & Immunology Terms and Conditions

3. Fig 2
Distribution of distance in meters to nearest of each of 4 different types of roadway for the 176 study participants. The 4 roadway types are interstate/freeway (blue), highway (yellow), arterial/major collector (red), and local/minor collector (green).
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2009 American Academy of Allergy, Asthma & Immunology Terms and Conditions

4. Fig 3
Mean FEV1 % predicted (pred.) values for quartiles of distance from nearest roadway in meters for the subjects with asthma (n = 144). The quartile means differ significantly (F = 5.75; P < .02).
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2009 American Academy of Allergy, Asthma & Immunology Terms and Conditions