Measurement Characteristics of Peak Expiratory Flow

Details

• Personal Author:
  Eisen EA ; Holcroft CA ; Sama SR ; Wegman, David H.
• Description:
  Study objectives: To evaluate features of the peak expiratory flow (PEF) test protocol, and to characterize patterns of reproducibility in multiple PEF measurements. Design: Cross-sectional study. Setting: University population. Participants: Two hundred twenty-three healthy adults. Interventions: Participants recorded five PEF measurements in each of five sessions per day for 1 week. Measurements and results: Patterns of within-session variability were characterized using a reproducibility criterion based on a large percentage difference between best trials and evidence of a maneuver-induced bronchospasm (MIB) indicated by successive drops of PEF values in a session. Although the maximum PEF value in a session occurred on the fourth or fifth trial 32% of the time, the change in PEF values was small. Supervision was associated with small improvements in level and reproducibility. Using a cutoff of 5% for defining reproducibility, 15% of all sessions were not reproducible. When averaged over each subject, 9% of the cohort had a mean difference > 5%. Overall, MIB was unusual and observed in 8% of all test sessions; however, MIB was more common among asthmatics and subjects with wheeze, atopy, or allergies than subjects without. By contrast, poor reproducibility was more common among smokers and subjects with cough and phlegm. Conclusions: These results illustrate that it may be unnecessary to supervise all sessions or collect more than three efforts. Results also suggest that reproducibility reflects smoking-related abnormalities, whereas MIB may reflect airways hyperresponsiveness. [Description provided by NIOSH]
• Subjects:
  Asthma Epidemiology Hypersensitivity Manufacturing And Industrial Facilities Men Mortality Occupational Health Respiratory Hypersensitivity Respiratory System Respiratory Tract Diseases Safety Smokers Women

  More +
• Keywords:
  Author Keywords: Asthma Bronchial Asthma Bronchial Spasm Epidemiologic Methods Humans Industrial Environment Mortality Rates Office Environments Peak Expiratory Flow Physiological Effects Reproducibility Of Results Respiratory Health Respiratory Hypersensitivity Respiratory System Disorders Smoking Statistical Analysis

  More +
• ISSN:
  0012-3692
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Massachusetts ; OSHA Region 1
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  124
• Issue:
  2
• NIOSHTIC Number:
  nn:20056892
• Citation:
  Chest 2003 Aug; 124(2):501-510
• Contact Point Address:
  Christina Holcroft, ScD, Work Environment Department, UMass Lowell, One University Ave, Lowell, MA, 01854
• Email:
  Christina_Holcroft@uml.edu
• Federal Fiscal Year:
  2003
• Performing Organization:
  Harvard School of Public Health
• Peer Reviewed:
  True
• Start Date:
  20030701
• Source Full Name:
  Chest
• End Date:
  20050630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:265c5e1e8b37fa8de107d148a5769a8454d0703caf6fe2d33c8747c0eb401f4c03c7de77ac6ecb367895f1fbb464cb33f7a2d06dd654711c4290dbcd56030b60
• Download URL:
  https://stacks.cdc.gov/view/cdc/214388/cdc_214388_DS1.pdf
• File Type:
  [PDF - 134.85 KB ]