Document Detail

Changes in forced expiratory volume in one second and peak expiratory flow rate across a work shift among unexposed blue collar workers.
MedLine Citation:
PMID:  2048805     Owner:  NLM     Status:  MEDLINE    
Pre- and postshift spirometry was obtained on 1,113 blue collar workers employed at 35 work sites judged to have no hazardous occupational respiratory exposures on the basis of inspection visits and environmental sampling. In addition to spirometry, a standardized questionnaire was administered by trained personnel. A study population of 944 remained after exclusion of workers for incomplete demographic data and/or spirometry with poor within-session reproducibility, i.e., greater than or equal to 10% variability in the two largest values of either FVC and/or FEV1. Overall mean values of changes across the work shift in FEV1 and peak expiratory flow rate (PEFR) were -0.8% (-0.04 L) and +2.1% (+0.13 L/s), respectively. Standard deviations for these across-shift changes were 5.8% (0.19 L) and 13.2% (1.19 L/s) for FEV1 and PEFR, respectively. In univariate analyses, mean values of across-shift changes were not statistically related to age, race, sex, smoking status, work shift, or FEV1/FVC ratio. However, variability (i.e., standard deviation) of across-shift changes were significantly related to some of these factors. These observations provide a basis for interpreting results of occupational respiratory morbidity surveys involving measurement of changes in FEV1 and/or PEFR across a work shift.
A J Ghio; R M Castellan; K B Kinsley; J L Hankinson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The American review of respiratory disease     Volume:  143     ISSN:  0003-0805     ISO Abbreviation:  Am. Rev. Respir. Dis.     Publication Date:  1991 Jun 
Date Detail:
Created Date:  1991-07-12     Completed Date:  1991-07-12     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370523     Medline TA:  Am Rev Respir Dis     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1231-4     Citation Subset:  AIM; IM    
Clinical Investigations Branch, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505.
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MeSH Terms
Environmental Exposure*
Forced Expiratory Volume*
Middle Aged
Occupational Medicine*
Peak Expiratory Flow Rate*
Reference Values
Time Factors
Vital Capacity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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