J. Sunyer et al., TOTAL SERUM IGE IS ASSOCIATED WITH ASTHMA INDEPENDENTLY OF SPECIFIC IGE LEVELS, The European respiratory journal, 9(9), 1996, pp. 1880-1884
In this study we aimed to assess whether the association between asthm
a (defined by symptoms and bronchial responsiveness) and total immunog
lobulin E (IgE) levels was independent of specific IgE level to common
aeroallergens. A general population-based sample, supplemented with s
ymptomatic individuals, comprising 1,916 young adults, aged 20-44 year
s, from five areas of Spain, performed a face-to-face respiratory ques
tionnaire, and spirometry, and had total and specific serum IgE levels
to mites, pets and moulds recorded. fn 1,626 of the subjects, a dose-
response methacholine challenge test was completed. Subjects reporting
current attacks of asthma showed an association with total IgE (odds
ratio (OR) for IgE > 100 kU . L(-1) 4.73, 95% confidence intervals (95
% CI) = 2.01-11.12, adjusted for specific IgE, sex, age, smoking, forc
ed expiratory volume in one second (FEV1), and area), which did not va
ry by bronchial responsiveness, The association between total IgE and
asthma also occurred among those with negative specific IgE antibodies
(OR 18.0; 95% 13.9-120). Individuals with current wheezing and bronch
ial responsiveness without attacks of asthma also showed an adjusted a
ssociation with total IgE (OR 4.96; 95% CI 2.32-10.6), which remained
for persons without specific IgE (QR 5.86; 95% CI 2.18-1.7). These fin
dings reinforce previous evidence that asthma is associated with incre
ased levels of fetal IgE, even in subjects negative for specific IgE t
o common aeroallergens.