Effect of Air Pollution on Long-Term Asthma Severity and Lung Function in Children (FACES)

The recruitment status of this study is unknown because the information has not been verified recently.
Verified February 2009 by National Heart, Lung, and Blood Institute (NHLBI).
Recruitment status was  Active, not recruiting
Mickey Leland National Urban Air Toxics Research Center
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
First received: June 9, 2006
Last updated: February 11, 2009
Last verified: February 2009
Asthma can be caused by many factors, including mold, pollen, and other airborne pollutants. The purpose of this study is to evaluate the effect that air pollution has on the long-term severity of asthma symptoms and lung function in children.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Fresno Asthmatic Children's Environment Study

Resource links provided by NLM:

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Primary Outcome Measures:
  • Effect that air pollution has on the long-term severity of asthma symptoms and lung function in children [ Time Frame: Measured during participants' study visits ] [ Designated as safety issue: No ]

Biospecimen Retention:   Samples With DNA
Password-protected database and storage facility that is part of the UCB SPH biorepository

Enrollment: 315
Study Start Date: November 2000
Estimated Study Completion Date: September 2010
Detailed Description:

Asthma prevalence has steadily increased in the United States since the early 1980's; currently more than 20 million people are diagnosed with asthma, including 9 million children. Asthma can be caused by many factors, including pollen, dust, tobacco smoke, and other allergens. Research has shown that even short-term increases in daily levels of air pollution can trigger an increase in asthma symptoms in some individuals. More research is needed to determine how short-term increases in air pollution affect the severity of asthma later in life. The Environmental Protection Agency (EPA) has constructed research monitoring stations, known as Supersites, to advance the understanding of the effect of airborne pollutants on the health of individuals. Data collected from the Supersites provide important information regarding air pollution and air quality levels. This study will use air pollution measurements obtained from the Fresno, California Supersite to monitor participants' exposure to air pollution. The purpose of the study is to determine if children who experience a worsening of asthma symptoms due to an increase in air pollution have greater long-term asthma severity and decreased lung function compared to children who do not experience a worsening of symptoms when exposed to air pollution.

This study will enroll children with asthma who live within 20 kilometers of the EPA Supersite in Fresno, California. Participants will have study visits twice a year for up to 2 ½ years. At study entry, participants will undergo a skin prick allergy test and complete a dietary questionnaire. At each study visit, a respiratory illness questionnaire will be completed, and participants will undergo spirometry tests to measure lung function. In addition to the twice yearly visits, participants will take part in three 14-day sessions each year, during which daily diaries will be completed and spirometry will be performed twice a day. Study staff will gather detailed air pollution information from the Supersite, mobile monitoring trailers, and inside and outside the participants' homes.

Beginning in May 2006, participants will take part in only one study visit and two 14-day sessions each year. Air pollution measurements will be obtained from only the Supersite. To estimate daily exposure to air pollution, all participants will wear a global positioning system (GPS) device and complete daily activity diaries for 5 days during the school year. Fifty participants who have demonstrated compliance with study procedures will be selected to also wear the GPS devices for 5 days during the summer months.


Ages Eligible for Study:   6 Years to 11 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Convenience sample of children ages 6-11 at intake with proven asthma. All live within a radius of 20 km from the EPA Super Site in Fresno, CA

Inclusion Criteria:

  • Asthma, as diagnosed by study criteria, which includes experiencing asthma symptoms and/or use of specific asthma medications in the 12 months prior to study entry
  • Resides within 20 kilometers of the EPA Supersite in Fresno, California
  • Is not planning to move within 3 months of study entry

Exclusion Criteria:

  • Current medical condition that would not allow individual to safely participate in the study
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00336050

Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
Mickey Leland National Urban Air Toxics Research Center
Principal Investigator: Ira B. Tager, MD, MPH School of Public Health, UC Berkeley
  More Information

Responsible Party: Ira B. Tager, MD, MPH, School of Public Health, University of California, Berkeley
ClinicalTrials.gov Identifier: NCT00336050     History of Changes
Other Study ID Numbers: 1341  R01HL081521-01A1 
Study First Received: June 9, 2006
Last Updated: February 11, 2009
Health Authority: United States: Federal Government

Keywords provided by National Heart, Lung, and Blood Institute (NHLBI):
Air Pollution
Pulmonary Function

ClinicalTrials.gov processed this record on May 26, 2016