Table 1. Characteristics of study participants.

Total number of serum samples	150
Demographic characteristics
Male/female ratio	99/51
Age, median (yr)	31.5
Age, range (yr)	3–73
Clinical symptoms and signs
Allergic rhinitis (%)	100.0
Nasal obstruction (%)	70.0
Asthma (%)	0.7
Atopic dermatitis (%)	6.0
Urticaria (%)	1.3