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Geographic Modeling of Traffic and Asthma Rates

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


Study Type: Observational
Study Design: Observational Model: Defined Population
Observational Model: Natural History
Time Perspective: Cross-Sectional
Time Perspective: Retrospective

Further study details as provided by National Institute of Environmental Health Sciences (NIEHS):

Study Start Date: September 2000
Estimated Study Completion Date: August 2003
Detailed Description:
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.

Ages Eligible for Study:   Child, Adult, Senior
  Contacts and Locations
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No Contacts or Locations Provided
  More Information Identifier: NCT00041834     History of Changes
Other Study ID Numbers: 10100-CP-001
Study First Received: July 18, 2002
Last Updated: June 23, 2005

Keywords provided by National Institute of Environmental Health Sciences (NIEHS):
childhood asthma

Additional relevant MeSH terms:
Bronchial Diseases
Respiratory Tract Diseases
Lung Diseases, Obstructive
Lung Diseases
Respiratory Hypersensitivity
Hypersensitivity, Immediate
Immune System Diseases processed this record on August 22, 2017