NCT00043992

Outdoor Allergen Exposure, Sensitivity, and Acute Asthma

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 1,000 (planned)
• Sponsor: National Institute of Environmental Health Sciences (NIEHS) · NIH
• Sex: All
• Age: 15 Years – 50 Years
• Healthy volunteers: Not accepted

Summary

To examine the role of outdoor pollen grains and fungal spores in the exacerbation of asthma and to produce forecasting models to predict days of high concentration.

Detailed description

Asthma is a growing problem, and outdoor allergens play a role in exacerbation of many cases. A clearer understanding of this role and its magnitude, and a means of controlling the effects of outdoor allergen exposures is needed. We propose Poisson time-series and conditional panel studies to test these hypotheses: 1) The incidence of acute asthma attacks, as measured by urgent care inhalation treatments and hospitalizations for asthma, has a dose-dependent relationship with exposure to specific outdoor allergens; 2) Specific sensitization to outdoor allergens is a risk factor for having an acute attack; and 3) Exposure conditions that lead to acute asthma attacks can be forecast, creating an opportunity to reduce asthma morbidity and mortality ny targeting pretreatment and/or exposure controls.

Conditions

• Asthma

Timeline

• Start date: 2001-07-01
• First posted: 2002-08-19
• Last updated: 2006-09-04

Locations

1 site across 1 country: United States