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1 Institut und Poliklinik fuer Arbeits- und Umweltmedizin, LMU Munich, Germany. 2 Institut fuer Hygiene und Arbeitsphysiologie, ETH Zurich, Switzerland. 3 Aarhus Kommunehospital, Aarhus, Denmark. 4 Zentrum für Pneumologie und Thoraxchirurgie, Großhansdorf, Germany. 5 Hospital Germans Trial i Pujol, Badalona, Spain. 6 Zentrum fuer Arbeitsbedingte Erkankungen, Brunsbüttel, Germany. 7 Dept of Preventive Medicine and Environmental Health, College of Medicine, University of Iowa, Iowa City, USA
CORRESPONDENCE: K. Radon, Institute of Occupational and Environmental Medicine, Ludwig-Maximilians-University Munich, Ziemssenstr. 1, Munich, Germany, D-80336. Fax: 49 8951603957
Keywords: animal confinement houses, ECRHS, pig farmers, poultry farmers
Received: April 13, 2000
Accepted December 12, 2000
This study was supported by the European Union, Bundesministerium für Arbeit und Sozialordnung Germany, Schleswig-Holsteinische Landwirtschaft-liche BG, Swiss National Science Foundation, BBW Switzerland.
Farmers are known to be at high risk for the development of occupational airway disease. The aim of this European study was to determine which airway symptoms predominate in different types of animal farmers (cattle, pigs, poultry, sheep) and to compare the prevalence of symptoms to the general population.
A total of 6,156 randomly selected animal farmers in Denmark, Germany (Schleswig-Holstein, Niedersachsen), Switzerland, and Spain completed a questionnaire on respiratory symptoms and farming characteristics in 19951997. The prevalence of general respiratory symptoms was compared to the results of the European Community Respiratory Health Survey (ECRHS) obtained in the same regions.
Pig farmers were at highest risk for the development of work-related symptoms. A significant dose-response relationship between daily hours worked inside animal houses and symptoms was established for pig and poultry farmers. Additionally, self-reported nasal allergies (odds ratio (95% confidence interval): 3.92 (3.264.71)) and nasal irritation during work (3.98 (3.354.73)) were shown to be associated with the development of chronic phlegm. The prevalence of wheezing, shortness of breath, asthma and nasal allergies was signficantly lower among all farmers in the age group 2044 yrs than among the general population. However, the prevalence of usually bringing up phlegm in winter among farmers was significantly higher than in the general population (9.4 (8.310.5%) versus 7.5 (6.58.5%)).
Individual factors have been shown to be related to the prevalence of chronic phlegm among farmers. Additionally, this study could support the hypothesis that farming could be negatively related to allergic diseases.
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