Serum IgE levels in patients with allergic problems and healthy subjects.

Total serum IgE levels were estimated in 219 patients with various allergic disorders (119 with bronchial asthma, 68 with allergic rhinitis and 32 with urticaria) and 240 healthy age matched subjects. Serum IgE levels were significantly (P < 0.001) higher in healthy males (mean 181 IU/ml) than females (mean 99 IU/ml). Higher levels were found in the age group 15 to 24 years and lowest in over 55 years. Males had higher IgE levels than females at any given age. Mean IgE levels were significantly (p < 0.001) higher in all three groups of patients than in healthy subjects. Among all age groups, the difference in mean IgE levels between allergic subjects and controls was significant. Positive skin test reactivity (to pollen and dust allergens) was found in 60% patients with asthma, 51% with allergic rhinitis, 46% with urticaria and in 4.5% healthy subjects. Patients with positive skin test had higher mean IgE levels as compared to those with negative skin test, but the difference was insignificant.