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Using reference values in pulmonary ventilation studies

M Bugiani1, P Piccioni, A Carosso

  • 1CPA, USSL, Torino, Italy.

La Medicina Del Lavoro
|September 1, 1993
PubMed
Summary
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This study evaluated reference values for pulmonary ventilation (FVC and FEV1) in occupational health. Significant differences were found, highlighting the need for critical use of reference values during screening tests for dust-exposed workers.

Area of Science:

  • Occupational Health
  • Pulmonary Medicine
  • Biostatistics

Background:

  • Pulmonary ventilation assessments, including Forced Vital Capacity (FVC) and Forced Expiratory Volume in 1 second (FEV1), are crucial in occupational health surveys.
  • The interpretation of these lung function parameters relies on established reference values, which can vary.
  • The selection of appropriate reference values is critical for accurately identifying occupational lung diseases.

Purpose of the Study:

  • To assess the discriminating power of six different reference values for pulmonary ventilation (FVC and FEV1).
  • To evaluate the effectiveness of these reference values in distinguishing between workers exposed to occupational dusts and non-exposed workers, considering smoking status.
  • To identify potential discrepancies in interpreting lung function data based on varying reference standards.

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Main Methods:

  • A comparative analysis of six distinct reference values for FVC and FEV1 was conducted.
  • The study involved a sample of 400 Italian males, comprising 200 foundry workers (dust-exposed) and 200 non-exposed workers.
  • Fifty percent of each group were smokers, allowing for analysis stratified by exposure and smoking habits.

Main Results:

  • Significant variations were observed among the six reference values in their ability to discriminate between exposed and non-exposed worker groups.
  • Differences in reference values may stem from distinct subject selection criteria and population characteristics in the studies from which they were derived.
  • The capacity of reference values to differentiate workers based on dust exposure and smoking status varied considerably.

Conclusions:

  • A critical approach is necessary when utilizing reference values for pulmonary ventilation in occupational health screening.
  • The choice of reference values can significantly impact the interpretation of lung function tests and the identification of occupational health risks.
  • Further research may be warranted to establish standardized and validated reference values for specific occupational populations.