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Protection from childhood asthma and allergy in Alpine farm environments : the GABRIEL Advanced Studies

Illi, S. and Depner, M. and Genuneit, J. and Horak, E. and Loss, G. and Strunz-Lehner, C. and Buchele, G. and Boznanski, A. and Danielewicz, H. and Cullinan, P. and Heederik, D. and Braun-Fahrländer, C. and von Mutius, E.. (2012) Protection from childhood asthma and allergy in Alpine farm environments : the GABRIEL Advanced Studies. Journal of allergy and clinical immunology, 129 (6). pp. 1470-1477.

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Official URL: http://edoc.unibas.ch/dok/A6094325

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Abstract

BACKGROUND: Studies on the association of farm environments with asthma and atopy have repeatedly observed a protective effect of farming. However, no single specific farm-related exposure explaining this protective farm effect has consistently been identified. OBJECTIVE: We sought to determine distinct farm exposures that account for the protective effect of farming on asthma and atopy. METHODS: In rural regions of Austria, Germany, and Switzerland, 79,888 school-aged children answered a recruiting questionnaire (phase I). In phase II a stratified random subsample of 8,419 children answered a detailed questionnaire on farming environment. Blood samples and specific IgE levels were available for 7,682 of these children. A broad asthma definition was used, comprising symptoms, diagnosis, or treatment ever. RESULTS: Children living on a farm were at significantly reduced risk of asthma (adjusted odds ratio [aOR], 0.68; 95% CI, 0.59-0.78; P > .001), hay fever (aOR, 0.43; 95% CI, 0.36-0.52; P > .001), atopic dermatitis (aOR, 0.80; 95% CI, 0.69-0.93; P = .004), and atopic sensitization (aOR, 0.54; 95% CI, 0.48-0.61; P > .001) compared with nonfarm children. Whereas this overall farm effect could be explained by specific exposures to cows, straw, and farm milk for asthma and exposure to fodder storage rooms and manure for atopic dermatitis, the farm effect on hay fever and atopic sensitization could not be completely explained by the questionnaire items themselves or their diversity. CONCLUSION: A specific type of farm typical for traditional farming (ie, with cows and cultivation) was protective against asthma, hay fever, and atopy. However, whereas the farm effect on asthma could be explained by specific farm characteristics, there is a link still missing for hay fever and atopy
Faculties and Departments:09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Environmental Exposures and Health
UniBasel Contributors:Loss, Georg
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Mosby
ISSN:0091-6749
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:03 May 2018 10:09
Deposited On:19 Jul 2013 07:41

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