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Lung function and bronchial reactivity in farmers.

M Iversen1, R Dahl, E J Jensen

  • 1Department of Respiratory Diseases, University Hospital, Aarhus, Denmark.

Thorax
|August 1, 1989
PubMed
Summary
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Danish farmers with respiratory symptoms often have lung function disorders like airway obstruction. Even symptomless farmers can exhibit bronchial hyperreactivity, indicating potential underlying respiratory issues.

Area of Science:

  • Occupational Health
  • Pulmonary Medicine
  • Epidemiology

Background:

  • Agricultural work, such as farming, is associated with various respiratory risks.
  • Understanding the prevalence and nature of lung function disorders in farmers is crucial for targeted health interventions.

Purpose of the Study:

  • To investigate the prevalence and characteristics of lung function abnormalities in Danish farmers.
  • To assess the relationship between respiratory symptoms, lung function parameters, and bronchial hyperreactivity in this occupational group.

Main Methods:

  • A cross-sectional study involving three groups of Danish farmers: those with asthma, those with other respiratory symptoms, and a symptomless control group.
  • Lung function tests including FEV1 and residual volume measurements were performed.

Related Experiment Videos

  • Bronchial hyperreactivity to histamine was assessed using standardized protocols.

    • Main Results:

    • Farmers reporting asthma or other respiratory symptoms (wheezing, shortness of breath, dry cough) demonstrated significantly reduced FEV1 and increased residual volume, indicative of airway obstruction.
    • A substantial proportion of farmers in symptomatic groups exhibited FEV1 below predicted values (43% in asthmatics, 23% in others).
    • High prevalence of bronchial hyperreactivity was observed across all groups, including 59% of symptomless farmers, with strong associations in symptomatic farmers with low FEV1 and pig farming exposure.

    Conclusions:

    • Danish farmers, particularly those with respiratory symptoms, frequently experience lung function disorders, including airway obstruction.
    • Bronchial hyperreactivity is common in farmers, even those without current symptoms, suggesting a need for proactive respiratory health surveillance in this population.
    • Factors like asthma diagnosis, reduced lung function, and specific farming activities (e.g., pig farming) are linked to lung function impairment and bronchial hyperreactivity.