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Atopy, smoking, and chronic bronchitis.

E O Terho1, K Husman, I Vohlonen

  • 1Department of Pulmonary Diseases, Kuopio University Central Hospital, Finland.

Journal of Epidemiology and Community Health
|December 1, 1987
PubMed
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Atopy and smoking independently increase chronic bronchitis risk in farmers. Both factors combined significantly elevate the likelihood of developing this respiratory condition, highlighting occupational and allergic influences.

Area of Science:

  • Occupational Medicine
  • Pulmonary Medicine
  • Allergology

Background:

  • Chronic bronchitis is a significant respiratory illness, particularly prevalent in occupational settings.
  • The interplay between genetic predisposition (atopy) and environmental factors (smoking, occupational exposures) in chronic bronchitis pathogenesis requires further elucidation.

Purpose of the Study:

  • To investigate the hypothesis that atopy exacerbates the occurrence of chronic bronchitis.
  • To analyze the independent and combined effects of atopy and smoking on chronic bronchitis development in a farming population.

Main Methods:

  • A longitudinal study involving 9017 farmers, with a subset of 6899 followed for three years.
  • Data collected via postal surveys and skin prick testing with 36 allergens on 150 farmers.

Related Experiment Videos

  • Logistic regression analysis used to calculate relative risks, adjusting for age, sex, smoking, and atopy.

    • Main Results:

    • Prevalence and incidence rates of chronic bronchitis were significantly higher in both atopic and smoking farmers compared to non-atopic non-smokers.
    • Atopy showed a relative risk of 2.2 (95% CI 1.8-2.7) and smoking a relative risk of 2.3 (95% CI 1.8-2.9) for chronic bronchitis.
    • Atopy and smoking demonstrated independent and additive effects on chronic bronchitis occurrence in this farming cohort.

    Conclusions:

    • Atopy is an independent risk factor for chronic bronchitis, particularly in individuals exposed to dusty occupational environments like farming.
    • Combined exposure to atopy and smoking significantly increases the risk of chronic bronchitis.
    • Findings underscore the importance of managing both allergic predispositions and smoking cessation in preventing chronic bronchitis in agricultural workers.