Urticaria in Monozygotic and Dizygotic Twins

Table 1

Descriptive characteristics of a sample of 575 Danish twins, 20–51 years of age.

	N (%)
Demographic data
Age	35.9 (8.2)
Males	240 (41.7)
Females	335 (58.3)
MZ twins	191 (33.2)
DZ twins	384 (66.8)
BMI	25.3 (4.6)
Smoking ever	262 (45.6)
Clinical traits
Urticaria ever	151 (26.3)
Urticaria in the past 12 months	24 (4.2)
Urticaria currently	0 (0)
Asthma	337 (58.6)
Hay fever	309 (53.7)
Atopic dermatitis	137 (23.8)
Paraclinical traits
Positive skin prick test	318 (55.3)
Serum total IgE	54.4 (4.3)

MZ: monozygotic; DZ: dizygotic; BMI: body mass index.
All numbers are prevalence (%) except age (years, mean); BMI (kg/m², mean); and serum total IgE (KIU/L, geometric mean).