Geographic Modeling of Traffic and Asthma Rates

This study has been completed.
Sponsor:
Information provided by:
National Institute of Environmental Health Sciences (NIEHS)
ClinicalTrials.gov Identifier:
NCT00041834
First received: July 18, 2002
Last updated: June 23, 2005
Last verified: July 2002

July 18, 2002
June 23, 2005
September 2000
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Complete list of historical versions of study NCT00041834 on ClinicalTrials.gov Archive Site
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Geographic Modeling of Traffic and Asthma Rates
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This study surveys the parents/guardians about symptoms and diagnosis of asthma in kindergarten and first-grade students in 13 schools around the city of Anchorage, Alaska. Traffic information is also measured and entered in geographical information mapping system with student's home and school locations. The study will assess whether students living in high traffic areas have greater risk of diagnosis of asthma.

Survey was distributed through the schools. Parents/guardians were asked about indoor exposures such as environmental tobacco smoke, insects, mold, woodstoves, as well as demographic information about the child and housing type, income,also biologic information about parental asthma. Questions included symptoms of respiratory illness as well as wheezing and medication use. Civil engineering department measured traffic on local roadways and gathered traffic information from state and municipal sources regarding traffic on arterioles and major traffic arteries. All information was entered into geographical information system (GIS) including the closest cross-streets to the child's home and the school location. Traffic exposure variables are being developed for each child and will be added to the database on indoor exposures. A regression model will be used to determine the significance of traffic exposure in receiving a diagnosis of asthma for children five to seven years of age.

Observational
Observational Model: Defined Population
Time Perspective: Cross-Sectional
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Asthma
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*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
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August 2003
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Contact information is only displayed when the study is recruiting subjects
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NCT00041834
10100-CP-001
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National Institute of Environmental Health Sciences (NIEHS)
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National Institute of Environmental Health Sciences (NIEHS)
July 2002

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP