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Grass Pollen Counts, Air Pollution Levels and Allergic Rhinitis Severity.
MedLine Citation:
PMID:  22487690     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background: Little is known about the relation between allergic rhinitis severity and airborne pollen in combination with air pollutants. Objective: To model the risk of suffering from severe seasonal allergic rhinitis (SAR) as a function of both pollen count and air pollution levels in a large nationwide sample of patients whose SAR was diagnosed by a physician and confirmed by skin prick test positivity or specific immunolglobulin E to common aeroallergens. Methods: The severity of SAR symptoms was estimated with the Symptomatic Global Score (SGS) among 36,397 patients suffering from an untreated and uncomplicated SAR between May and August 2004 in metropolitan France. Patients who had an SGS in the upper third quartile were classified as suffering from severe SAR. A multilevel model relating SAR severity, pollen and air pollution was used to take into account the hierarchical data structure. Results: 18.9% of the 17,567 urban patients retained for the analysis suffered from severe rhinitis. At the Lag0 (day of the visit), a rise of 60 grass pollen grains/m(3) increased the risk of suffering from a severe SAR form by 8% in the multileveled model after adjusting for potential confounders and air pollution levels. Results were also confirmed in the subsample of individuals with documented sensitization to grass pollen. Conclusion: Grass pollen count aggravated SAR in terms of symptoms in our nationwide sample. These findings confirm the need for proper treatment and preventive measures in SAR patients sensitized to grass pollen.
Authors:
Isabella Annesi-Maesano; Sarah Rouve; Hélène Desqueyroux; Roger Jankovski; Jean-Michel Klossek; Michel Thibaudon; Pascal Demoly; Alain Didier
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-04
Journal Detail:
Title:  International archives of allergy and immunology     Volume:  158     ISSN:  1423-0097     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9211652     Medline TA:  Int Arch Allergy Immunol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  397-404     Citation Subset:  -    
Copyright Information:
Copyright © 2012 S. Karger AG, Basel.
Affiliation:
INSERM, Paris, France.
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