Association between IgE levels and asthma severity among African American, Mexican, and Puerto Rican patients with asthma

J Allergy Clin Immunol. 2007 Jul;120(1):137-43. doi: 10.1016/j.jaci.2007.02.045. Epub 2007 May 11.

Abstract

Background: High levels of IgE are associated with asthma. Whether higher levels of IgE are associated with more severe asthma is still unclear.

Objective: To determine whether IgE is associated with asthma severity among Latino and African American subjects with asthma.

Methods: We assessed lung function and asthma severity among African American, Mexican, and Puerto Rican patients with asthma with high IgE levels (> or =100 IU/mL; n = 492) and compared these values to those of patients with asthma with low IgE levels (<100 IU/mL; n = 247). We also examined IgE as a continuous variable among these groups.

Results: Patients with asthma with high IgE had a lower mean FEV(1) (87.6 +/- 17.1, percent of predicted) than patients with asthma with low IgE (91.5 +/- 17.0; P = .031). Regardless of race and ethnicity, baseline FEV(1), forced expiratory flow, and FEV(1)/forced vital capacity were lower among subjects with high IgE than among subjects with low IgE (P = .031, P < .0001, P = .0001, respectively). In addition, 54.7% of patients with asthma with high IgE had been previously hospitalized, compared with 44.1% of patients with asthma with low IgE (odds ratio, 1.33; 95% CI, 1.04-1.71).

Conclusion: Higher IgE is associated with lower baseline lung function and more severe asthma among these populations.

Clinical implications: Among patients with asthma from 3 ethnically distinct groups, total IgE levels are inversely correlated with baseline lung function and asthma severity.

Publication types

  • Comparative Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • African Americans
  • Asthma / diagnosis*
  • Asthma / ethnology*
  • Child
  • Humans
  • Immunoglobulin E / blood*
  • Mexico
  • Puerto Rico

Substances

  • Immunoglobulin E