Title: Asthma in the elderly: cockroach sensitization and severity of airway obstruction in elderly nonsmokers.
Authors: Rogers, Linda; Cassino, Cara; Berger, Kenneth I; Goldring, Roberta M; Norman, Robert G; Klugh, Thomas; Reibman, Joan
Published In Chest, (2002 Nov)
Abstract: To test the hypothesis that the presence of sensitization to indoor allergens is associated with increased severity of airway obstruction in elderly subjects with asthma.Cohort study of subjects enrolled in a public hospital asthma clinic.Asthma clinic in a municipal public hospital serving an indigent population in New York City.Subjects aged > or = 60 years with asthma who were enrolled in the Bellevue Hospital Asthma Clinic. Total serum IgE and allergen-specific IgE measurements were performed in a cohort of elderly never-smokers who had asthma (45 patients) who had undergone spirometry before and after bronchodilator (BD) therapy.The results of radioallergosorbent tests demonstrated that most subjects (ie, 60%) were sensitized to at least one allergen, with many sensitized to at least one indoor allergen. Cockroach (CR) was the most common allergen to which subjects were sensitized, with 47% displaying an elevated serum-specific IgE level. Fewer subjects were sensitized to dust mite, cat, dog, or ragweed. Subjects sensitized to CR (CR+) had greater reductions in airflow compared to subjects not sensitized to CR (CR-) [64 +/- 4.4% predicted vs 77.1 +/- 4.1% predicted FEV(1), respectively; p < 0.05]. Following BD administration, only 29% of CR+ subjects achieved a normal post-BD FEV(1) compared to 58% of CR- subjects. Lung volume measurements differed between CR+ and CR- subjects, with a greater elevation of functional residual capacity in CR+ subjects.In a population of elderly urban patients with asthma, the presence of CR-specific serum IgE is associated with more severe asthma, as reflected by an increase in airway obstruction and hyperinflation.
PubMed ID: 12426256
MeSH Terms: Aged; Aged, 80 and over; Airway Obstruction/immunology; Animals; Asthma/blood; Asthma/immunology*; Asthma/physiopathology; Cockroaches*; Female; Forced Expiratory Volume; Humans; Immunoglobulin E/blood; Male; Middle Aged; Severity of Illness Index