Sources of Variability in Peak Expiratory Flow

This study has been completed.
Sponsor:
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier:
NCT00005382
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: November 2001

May 25, 2000
June 23, 2005
July 1995
Not Provided
Not Provided
Not Provided
Complete list of historical versions of study NCT00005382 on ClinicalTrials.gov Archive Site
Not Provided
Not Provided
Not Provided
Not Provided
 
Sources of Variability in Peak Expiratory Flow
Not Provided

To provide information necessary for the development of standards for peak expiratory flow (PEF) test performance in populations studies.

BACKGROUND:

While PEF has routinely been applied in the diagnosis and management of asthma, scientists were finding new applications for PEF as both a clinical and epidemiologic tool for following individuals with pulmonary diseases, studying the natural history of chronic obstructive pulmonary disease, and evaluating the impact of environmental exposures on lung function. Yet the standardization of the PEF measurement lagged behind its application.

The little attention paid to the performance characteristics of the PEF maneuver contrasted sharply with the efforts to standardize measurement procedures for FEV1 and FVC. The American Thoracic Society devoted a great deal of attention to studying these measures and published guidelines for the standardization of their measurement. These guidelines included detailed protocols for calibrating equipment, administering the tests, determining reproducibility, and interpreting results.

The research provided data on the optimal number of trials per test session, the difference between a PEF performed during a full forced expiratory effort and that resulting from a short blast, the impact of test supervision on test performance, and the reproducibility of the PEF measurement.

DESIGN NARRATIVE:

A baseline survey of ventilatory function was performed using spirometry. PEF was measured daily with a mini-Wright Peak Flow Meter over a period of several weeks in a study of 201 normals (staff, faculty and graduate students at the University of Massachusetts Lowell). Serial PEF data were collected on a group of mild asthmatics identified in a local occupational medicine clinic. Finally, performance characteristics were examined in serial PEF data from two existing occupational cohort studies.

Observational
Observational Model: Natural History
Not Provided
Not Provided
Not Provided
Not Provided
  • Asthma
  • Lung Diseases, Obstructive
  • Chronic Obstructive Pulmonary Disease
Not Provided
Not Provided
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
Not Provided
May 1998
Not Provided

No eligibility criteria

Male
Not Provided
No
Contact information is only displayed when the study is recruiting subjects
Not Provided
 
NCT00005382
4287
Not Provided
Not Provided
National Heart, Lung, and Blood Institute (NHLBI)
Not Provided
Not Provided
National Heart, Lung, and Blood Institute (NHLBI)
November 2001

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