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Epidemiology of urticaria in Spain.

Author information

1
Allergy Unit, Hospital Universitari Joan XXIII, Universitat Rovira i Virgili, Tarragona, Spain.

Abstract

BACKGROUND:

In spite of the frequency of chronic urticaria there are very few epidemiological studies of its prevalence and distribution.

OBJECTIVE:

We wanted to approach the real prevalence of chronic urticaria in a population-based study and to depict demographic distribution and personal perception of the disease. We also wanted to describe the frequency of acute urticaria episodes in the population studied.

METHODS:

We conducted a population-based study among adults in Spain. We questioned 5003 individuals after calculating a sample size for a maximum variability (conservative approach p=q=0.5).

RESULTS:

We found a 0.6% (95% CI: 0.4-0.8) prevalence of chronic urticaria. The prevalence is significantly higher in women than in men with a OR=3.82 (95%CI 1.56-9.37). Chronic urticaria is a self-limited disease, yet in 8.7% of cases chronic urticaria lasts from one to 5 years and in 11.3%, for more than 5 years. The average age of onset is 40 years.

CONCLUSIONS:

We offer large epidemiology study data on the prevalence of chronic urticaria. The prevalence of chronic urticaria has not yet been defined in an adult population-based study. With this work we offer such data to describe the prevalence and features of this disease.

PMID:
15552715
[Indexed for MEDLINE]

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