Traffic-related exposures, airway function, inflammation, and respiratory symptoms in children.

Rationale: Traffic-related emissions have been associated with respiratory symptoms in some studies. However, there is limited information on how traffic-related emissions relate to lung function and airway inflammation.

Objectives: To determine the differential association of traffic-related exposures with exhaled nitric oxide (NO) and lung volumes and symptoms in children with and without asthma.

Air pollution and heart rate variability among the elderly in Mexico City.

Background: Suspended particles and ozone have been associated with varying degrees of cardiac autonomic dysfunction.

Methods: In Mexico City, residents from a nursing home underwent heart rate variability analysis every other day for 3 months. Indoor and outdoor PM2.