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RESEARCH PRODUCT
Bronchial hyperresponsiveness in children with atopic rhinitis: a 7-year follow-up
S. La GruttaGiuseppina CuttittaFabio CibellaGiovanni Battista PajnoM. R. HoppsGiovanni BonsignoreGianni Passalacquasubject
MaleAllergymedicine.medical_specialtyAdolescentAtopic RhinitisImmunologyPopulationLongitudinal StudieFollow-Up StudieAtopychildrennonspecific bronchial hyperresponsivenessInternal medicinemedicineHypersensitivityHumansImmunology and AllergyLongitudinal StudiesHumans; Disease Progression; Asthma; Child; Rhinitis; Longitudinal Studies; Hypersensitivity; Pulmonary Ventilation; Bronchial Hyperreactivity; Follow-Up Studies; Adolescent; Female; MaleeducationChildRhinitiRhinitisAsthmaeducation.field_of_studyallergic rhinitis; asthma; children; methacholine test; nonspecific bronchial hyperresponsivenessallergic rhinitisbusiness.industryRespiratory diseasemethacholine testrespiratory systemasthmamedicine.diseaserespiratory tract diseasesBronchial hyperresponsivenessImmunologyDisease ProgressionMethacholineFemaleBronchial HyperreactivitybusinessPulmonary VentilationFollow-Up Studiesmedicine.drugHumandescription
Background: A high prevalence of bronchial hyperresponsiveness (BHR) was found in atopic subjects with rhinitis. Those subjects may be at higher risk for developing bronchial asthma. We evaluated, in a 7-year follow-up, BHR and atopy in a homogeneous population of nonasthmatic children with allergic rhinitis (AR), and their role in asthma development. Methods: Twenty-eight children (6–15 years) with AR were studied. At enrollment (T0), skin tests, total serum IgE assay, peak expiratory flow (PEF) monitoring and methacholine (Mch) bronchial challenge were performed. BHR was computed as the Mch dose causing a 20% forced expiratory volume (FEV)1 fall (PD20FEV1) and as dose–response slope (DRS). Subjects were reassessed after 7 years (T1) using the same criteria. Results: At T0, 13 children (46%), showing a PD20FEV1 <1526 μg of Mch, had BHR (Mch+), although PEF variability (PEFv) was within normal limits. None of the children with negative methacholine test developed bronchial asthma after 7 years. Of the 13 Mch+, only two reported asthma symptoms after 7 years. No significant change was seen in the other parameters of atopy considered. Conclusion: Children with allergic rhinitis present a high prevalence of BHR. Nevertheless, their PEFv is normal and the rate of asthma development low.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-10-01 |