Determinants of Respiratory Health in Young Adults

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005361
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: June 2000
  Purpose

To measure lung function and respiratory symptom status in a large cohort of healthy, non-smoking 18-22 year old subjects, and relate these measurements to past histories of passive smoke and air pollution exposures.


Condition
Lung Diseases

Study Type: Observational

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

Study Start Date: April 1993
Estimated Study Completion Date: March 1998
Detailed Description:

BACKGROUND:

While the natural history of human lung function growth and decline has been studied intensively over the past 30 years, relatively few data have been collected during the period in which peak volumetric function is achieved, i.e., around the age of 20. As a result, very little is known about the factors, both demographic and environmental, which influence maximal attained lung function.

DESIGN NARRATIVE:

The longitudinal study collected information on the history of respiratory illness, residential history, parental smoking, socio-economic status and home characteristics via an initial questionnaire administered to cadets enrolling at West Point. A sequence of four annual measurements of lung function (by spirometry), and prior-year respiratory health status and activity patterns was obtained in the spring of each year. Pollution exposures were estimated by matching residential histories with historical pollution data stored at the Environmental Protection Agency. Data on meteorological variables (temperature, relative humidity, wind speed) and altitude were obtained for each residential location. The four annual lung function measurements provided precise estimates of individual mean levels of FVC, FEV1, FEF25-75, PEFR, and flow rates at 50 percent and 75 percent of expired FVC. Subject-specific lung function level was analyzed in relation to history of parental smoking and prior exposure to air pollution using analysis of variance methods, controlling for potential confounding variables. In addition to testing these hypotheses regarding the respiratory effects of passive smoking and air pollution exposure, the study also explored the effects of these exposures on the change in lung function between the ages of 18 and 22 and on respiratory illness and symptom experience while at West Point. Finally, the study established a cohort which could be followed in future years.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

No eligibility criteria

  Contacts and Locations
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No Contacts or Locations Provided
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00005361     History of Changes
Other Study ID Numbers: 4248
Study First Received: May 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Lung Diseases
Respiratory Tract Diseases

ClinicalTrials.gov processed this record on October 23, 2014